worker.js

// used in Attr to signal changes
const CHANGED = Symbol('changed');

// used in Element to setup once classList
const CLASS_LIST = Symbol('classList');

// used in Document to attach once customElements
const CUSTOM_ELEMENTS = Symbol('CustomElements');

// used in HTMLTemplateElement
const CONTENT = Symbol('content');

// used in Element for data attributes
const DATASET = Symbol('dataset');

// used in Document to attach the DocType
const DOCTYPE = Symbol('doctype');

// used in parser and Document to attach once a DOMParser
const DOM_PARSER = Symbol('DOMParser');

// used to reference an end node
const END = Symbol('end');

// used in Document to make the globalThis an event target
const EVENT_TARGET = Symbol('EventTarget');

// used to augment a created document defaultView
const GLOBALS = Symbol('globals');

// used in both Canvas and Document to provide images
const IMAGE = Symbol('image');

// used to define Document mime type
const MIME = Symbol('mime');

// used in Document to attach once MutationObserver
const MUTATION_OBSERVER = Symbol('MutationObserver');

// used to define next node reference
const NEXT = Symbol('next');

// used to define Attr owner elements
const OWNER_ELEMENT = Symbol('ownerElement');

// used to define previous node reference
const PREV = Symbol('prev');

// used to define various "private" properties
const PRIVATE = Symbol('private');

// used to define the CSSStyleSheet.sheet
const SHEET = Symbol('sheet');

// used to define start node reference
const START = Symbol('start');

// used to define special CSS style attribute
const STYLE = Symbol('style');

// used to upgrade Custom Elements
const UPGRADE = Symbol('upgrade');

// used to define generic values
const VALUE = Symbol('value');

// Generated using scripts/write-decode-map.ts
var htmlDecodeTree = new Uint16Array(
// prettier-ignore
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    .split("")
    .map((c) => c.charCodeAt(0)));

// Generated using scripts/write-decode-map.ts
var xmlDecodeTree = new Uint16Array(
// prettier-ignore
"\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022"
    .split("")
    .map((c) => c.charCodeAt(0)));

// Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134
var _a;
const decodeMap = new Map([
    [0, 65533],
    // C1 Unicode control character reference replacements
    [128, 8364],
    [130, 8218],
    [131, 402],
    [132, 8222],
    [133, 8230],
    [134, 8224],
    [135, 8225],
    [136, 710],
    [137, 8240],
    [138, 352],
    [139, 8249],
    [140, 338],
    [142, 381],
    [145, 8216],
    [146, 8217],
    [147, 8220],
    [148, 8221],
    [149, 8226],
    [150, 8211],
    [151, 8212],
    [152, 732],
    [153, 8482],
    [154, 353],
    [155, 8250],
    [156, 339],
    [158, 382],
    [159, 376],
]);
/**
 * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point.
 */
const fromCodePoint = 
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition, node/no-unsupported-features/es-builtins
(_a = String.fromCodePoint) !== null && _a !== void 0 ? _a : function (codePoint) {
    let output = "";
    if (codePoint > 0xffff) {
        codePoint -= 0x10000;
        output += String.fromCharCode(((codePoint >>> 10) & 0x3ff) | 0xd800);
        codePoint = 0xdc00 | (codePoint & 0x3ff);
    }
    output += String.fromCharCode(codePoint);
    return output;
};
/**
 * Replace the given code point with a replacement character if it is a
 * surrogate or is outside the valid range. Otherwise return the code
 * point unchanged.
 */
function replaceCodePoint(codePoint) {
    var _a;
    if ((codePoint >= 0xd800 && codePoint <= 0xdfff) || codePoint > 0x10ffff) {
        return 0xfffd;
    }
    return (_a = decodeMap.get(codePoint)) !== null && _a !== void 0 ? _a : codePoint;
}

var CharCodes$1;
(function (CharCodes) {
    CharCodes[CharCodes["NUM"] = 35] = "NUM";
    CharCodes[CharCodes["SEMI"] = 59] = "SEMI";
    CharCodes[CharCodes["EQUALS"] = 61] = "EQUALS";
    CharCodes[CharCodes["ZERO"] = 48] = "ZERO";
    CharCodes[CharCodes["NINE"] = 57] = "NINE";
    CharCodes[CharCodes["LOWER_A"] = 97] = "LOWER_A";
    CharCodes[CharCodes["LOWER_F"] = 102] = "LOWER_F";
    CharCodes[CharCodes["LOWER_X"] = 120] = "LOWER_X";
    CharCodes[CharCodes["LOWER_Z"] = 122] = "LOWER_Z";
    CharCodes[CharCodes["UPPER_A"] = 65] = "UPPER_A";
    CharCodes[CharCodes["UPPER_F"] = 70] = "UPPER_F";
    CharCodes[CharCodes["UPPER_Z"] = 90] = "UPPER_Z";
})(CharCodes$1 || (CharCodes$1 = {}));
/** Bit that needs to be set to convert an upper case ASCII character to lower case */
const TO_LOWER_BIT = 0b100000;
var BinTrieFlags;
(function (BinTrieFlags) {
    BinTrieFlags[BinTrieFlags["VALUE_LENGTH"] = 49152] = "VALUE_LENGTH";
    BinTrieFlags[BinTrieFlags["BRANCH_LENGTH"] = 16256] = "BRANCH_LENGTH";
    BinTrieFlags[BinTrieFlags["JUMP_TABLE"] = 127] = "JUMP_TABLE";
})(BinTrieFlags || (BinTrieFlags = {}));
function isNumber(code) {
    return code >= CharCodes$1.ZERO && code <= CharCodes$1.NINE;
}
function isHexadecimalCharacter(code) {
    return ((code >= CharCodes$1.UPPER_A && code <= CharCodes$1.UPPER_F) ||
        (code >= CharCodes$1.LOWER_A && code <= CharCodes$1.LOWER_F));
}
function isAsciiAlphaNumeric(code) {
    return ((code >= CharCodes$1.UPPER_A && code <= CharCodes$1.UPPER_Z) ||
        (code >= CharCodes$1.LOWER_A && code <= CharCodes$1.LOWER_Z) ||
        isNumber(code));
}
/**
 * Checks if the given character is a valid end character for an entity in an attribute.
 *
 * Attribute values that aren't terminated properly aren't parsed, and shouldn't lead to a parser error.
 * See the example in https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state
 */
function isEntityInAttributeInvalidEnd(code) {
    return code === CharCodes$1.EQUALS || isAsciiAlphaNumeric(code);
}
var EntityDecoderState;
(function (EntityDecoderState) {
    EntityDecoderState[EntityDecoderState["EntityStart"] = 0] = "EntityStart";
    EntityDecoderState[EntityDecoderState["NumericStart"] = 1] = "NumericStart";
    EntityDecoderState[EntityDecoderState["NumericDecimal"] = 2] = "NumericDecimal";
    EntityDecoderState[EntityDecoderState["NumericHex"] = 3] = "NumericHex";
    EntityDecoderState[EntityDecoderState["NamedEntity"] = 4] = "NamedEntity";
})(EntityDecoderState || (EntityDecoderState = {}));
var DecodingMode;
(function (DecodingMode) {
    /** Entities in text nodes that can end with any character. */
    DecodingMode[DecodingMode["Legacy"] = 0] = "Legacy";
    /** Only allow entities terminated with a semicolon. */
    DecodingMode[DecodingMode["Strict"] = 1] = "Strict";
    /** Entities in attributes have limitations on ending characters. */
    DecodingMode[DecodingMode["Attribute"] = 2] = "Attribute";
})(DecodingMode || (DecodingMode = {}));
/**
 * Token decoder with support of writing partial entities.
 */
class EntityDecoder {
    constructor(
    /** The tree used to decode entities. */
    decodeTree, 
    /**
     * The function that is called when a codepoint is decoded.
     *
     * For multi-byte named entities, this will be called multiple times,
     * with the second codepoint, and the same `consumed` value.
     *
     * @param codepoint The decoded codepoint.
     * @param consumed The number of bytes consumed by the decoder.
     */
    emitCodePoint, 
    /** An object that is used to produce errors. */
    errors) {
        this.decodeTree = decodeTree;
        this.emitCodePoint = emitCodePoint;
        this.errors = errors;
        /** The current state of the decoder. */
        this.state = EntityDecoderState.EntityStart;
        /** Characters that were consumed while parsing an entity. */
        this.consumed = 1;
        /**
         * The result of the entity.
         *
         * Either the result index of a numeric entity, or the codepoint of a
         * numeric entity.
         */
        this.result = 0;
        /** The current index in the decode tree. */
        this.treeIndex = 0;
        /** The number of characters that were consumed in excess. */
        this.excess = 1;
        /** The mode in which the decoder is operating. */
        this.decodeMode = DecodingMode.Strict;
    }
    /** Resets the instance to make it reusable. */
    startEntity(decodeMode) {
        this.decodeMode = decodeMode;
        this.state = EntityDecoderState.EntityStart;
        this.result = 0;
        this.treeIndex = 0;
        this.excess = 1;
        this.consumed = 1;
    }
    /**
     * Write an entity to the decoder. This can be called multiple times with partial entities.
     * If the entity is incomplete, the decoder will return -1.
     *
     * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the
     * entity is incomplete, and resume when the next string is written.
     *
     * @param string The string containing the entity (or a continuation of the entity).
     * @param offset The offset at which the entity begins. Should be 0 if this is not the first call.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    write(str, offset) {
        switch (this.state) {
            case EntityDecoderState.EntityStart: {
                if (str.charCodeAt(offset) === CharCodes$1.NUM) {
                    this.state = EntityDecoderState.NumericStart;
                    this.consumed += 1;
                    return this.stateNumericStart(str, offset + 1);
                }
                this.state = EntityDecoderState.NamedEntity;
                return this.stateNamedEntity(str, offset);
            }
            case EntityDecoderState.NumericStart: {
                return this.stateNumericStart(str, offset);
            }
            case EntityDecoderState.NumericDecimal: {
                return this.stateNumericDecimal(str, offset);
            }
            case EntityDecoderState.NumericHex: {
                return this.stateNumericHex(str, offset);
            }
            case EntityDecoderState.NamedEntity: {
                return this.stateNamedEntity(str, offset);
            }
        }
    }
    /**
     * Switches between the numeric decimal and hexadecimal states.
     *
     * Equivalent to the `Numeric character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNumericStart(str, offset) {
        if (offset >= str.length) {
            return -1;
        }
        if ((str.charCodeAt(offset) | TO_LOWER_BIT) === CharCodes$1.LOWER_X) {
            this.state = EntityDecoderState.NumericHex;
            this.consumed += 1;
            return this.stateNumericHex(str, offset + 1);
        }
        this.state = EntityDecoderState.NumericDecimal;
        return this.stateNumericDecimal(str, offset);
    }
    addToNumericResult(str, start, end, base) {
        if (start !== end) {
            const digitCount = end - start;
            this.result =
                this.result * Math.pow(base, digitCount) +
                    parseInt(str.substr(start, digitCount), base);
            this.consumed += digitCount;
        }
    }
    /**
     * Parses a hexadecimal numeric entity.
     *
     * Equivalent to the `Hexademical character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNumericHex(str, offset) {
        const startIdx = offset;
        while (offset < str.length) {
            const char = str.charCodeAt(offset);
            if (isNumber(char) || isHexadecimalCharacter(char)) {
                offset += 1;
            }
            else {
                this.addToNumericResult(str, startIdx, offset, 16);
                return this.emitNumericEntity(char, 3);
            }
        }
        this.addToNumericResult(str, startIdx, offset, 16);
        return -1;
    }
    /**
     * Parses a decimal numeric entity.
     *
     * Equivalent to the `Decimal character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNumericDecimal(str, offset) {
        const startIdx = offset;
        while (offset < str.length) {
            const char = str.charCodeAt(offset);
            if (isNumber(char)) {
                offset += 1;
            }
            else {
                this.addToNumericResult(str, startIdx, offset, 10);
                return this.emitNumericEntity(char, 2);
            }
        }
        this.addToNumericResult(str, startIdx, offset, 10);
        return -1;
    }
    /**
     * Validate and emit a numeric entity.
     *
     * Implements the logic from the `Hexademical character reference start
     * state` and `Numeric character reference end state` in the HTML spec.
     *
     * @param lastCp The last code point of the entity. Used to see if the
     *               entity was terminated with a semicolon.
     * @param expectedLength The minimum number of characters that should be
     *                       consumed. Used to validate that at least one digit
     *                       was consumed.
     * @returns The number of characters that were consumed.
     */
    emitNumericEntity(lastCp, expectedLength) {
        var _a;
        // Ensure we consumed at least one digit.
        if (this.consumed <= expectedLength) {
            (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed);
            return 0;
        }
        // Figure out if this is a legit end of the entity
        if (lastCp === CharCodes$1.SEMI) {
            this.consumed += 1;
        }
        else if (this.decodeMode === DecodingMode.Strict) {
            return 0;
        }
        this.emitCodePoint(replaceCodePoint(this.result), this.consumed);
        if (this.errors) {
            if (lastCp !== CharCodes$1.SEMI) {
                this.errors.missingSemicolonAfterCharacterReference();
            }
            this.errors.validateNumericCharacterReference(this.result);
        }
        return this.consumed;
    }
    /**
     * Parses a named entity.
     *
     * Equivalent to the `Named character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */
    stateNamedEntity(str, offset) {
        const { decodeTree } = this;
        let current = decodeTree[this.treeIndex];
        // The mask is the number of bytes of the value, including the current byte.
        let valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14;
        for (; offset < str.length; offset++, this.excess++) {
            const char = str.charCodeAt(offset);
            this.treeIndex = determineBranch(decodeTree, current, this.treeIndex + Math.max(1, valueLength), char);
            if (this.treeIndex < 0) {
                return this.result === 0 ||
                    // If we are parsing an attribute
                    (this.decodeMode === DecodingMode.Attribute &&
                        // We shouldn't have consumed any characters after the entity,
                        (valueLength === 0 ||
                            // And there should be no invalid characters.
                            isEntityInAttributeInvalidEnd(char)))
                    ? 0
                    : this.emitNotTerminatedNamedEntity();
            }
            current = decodeTree[this.treeIndex];
            valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14;
            // If the branch is a value, store it and continue
            if (valueLength !== 0) {
                // If the entity is terminated by a semicolon, we are done.
                if (char === CharCodes$1.SEMI) {
                    return this.emitNamedEntityData(this.treeIndex, valueLength, this.consumed + this.excess);
                }
                // If we encounter a non-terminated (legacy) entity while parsing strictly, then ignore it.
                if (this.decodeMode !== DecodingMode.Strict) {
                    this.result = this.treeIndex;
                    this.consumed += this.excess;
                    this.excess = 0;
                }
            }
        }
        return -1;
    }
    /**
     * Emit a named entity that was not terminated with a semicolon.
     *
     * @returns The number of characters consumed.
     */
    emitNotTerminatedNamedEntity() {
        var _a;
        const { result, decodeTree } = this;
        const valueLength = (decodeTree[result] & BinTrieFlags.VALUE_LENGTH) >> 14;
        this.emitNamedEntityData(result, valueLength, this.consumed);
        (_a = this.errors) === null || _a === void 0 ? void 0 : _a.missingSemicolonAfterCharacterReference();
        return this.consumed;
    }
    /**
     * Emit a named entity.
     *
     * @param result The index of the entity in the decode tree.
     * @param valueLength The number of bytes in the entity.
     * @param consumed The number of characters consumed.
     *
     * @returns The number of characters consumed.
     */
    emitNamedEntityData(result, valueLength, consumed) {
        const { decodeTree } = this;
        this.emitCodePoint(valueLength === 1
            ? decodeTree[result] & ~BinTrieFlags.VALUE_LENGTH
            : decodeTree[result + 1], consumed);
        if (valueLength === 3) {
            // For multi-byte values, we need to emit the second byte.
            this.emitCodePoint(decodeTree[result + 2], consumed);
        }
        return consumed;
    }
    /**
     * Signal to the parser that the end of the input was reached.
     *
     * Remaining data will be emitted and relevant errors will be produced.
     *
     * @returns The number of characters consumed.
     */
    end() {
        var _a;
        switch (this.state) {
            case EntityDecoderState.NamedEntity: {
                // Emit a named entity if we have one.
                return this.result !== 0 &&
                    (this.decodeMode !== DecodingMode.Attribute ||
                        this.result === this.treeIndex)
                    ? this.emitNotTerminatedNamedEntity()
                    : 0;
            }
            // Otherwise, emit a numeric entity if we have one.
            case EntityDecoderState.NumericDecimal: {
                return this.emitNumericEntity(0, 2);
            }
            case EntityDecoderState.NumericHex: {
                return this.emitNumericEntity(0, 3);
            }
            case EntityDecoderState.NumericStart: {
                (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed);
                return 0;
            }
            case EntityDecoderState.EntityStart: {
                // Return 0 if we have no entity.
                return 0;
            }
        }
    }
}
/**
 * Creates a function that decodes entities in a string.
 *
 * @param decodeTree The decode tree.
 * @returns A function that decodes entities in a string.
 */
function getDecoder(decodeTree) {
    let ret = "";
    const decoder = new EntityDecoder(decodeTree, (str) => (ret += fromCodePoint(str)));
    return function decodeWithTrie(str, decodeMode) {
        let lastIndex = 0;
        let offset = 0;
        while ((offset = str.indexOf("&", offset)) >= 0) {
            ret += str.slice(lastIndex, offset);
            decoder.startEntity(decodeMode);
            const len = decoder.write(str, 
            // Skip the "&"
            offset + 1);
            if (len < 0) {
                lastIndex = offset + decoder.end();
                break;
            }
            lastIndex = offset + len;
            // If `len` is 0, skip the current `&` and continue.
            offset = len === 0 ? lastIndex + 1 : lastIndex;
        }
        const result = ret + str.slice(lastIndex);
        // Make sure we don't keep a reference to the final string.
        ret = "";
        return result;
    };
}
/**
 * Determines the branch of the current node that is taken given the current
 * character. This function is used to traverse the trie.
 *
 * @param decodeTree The trie.
 * @param current The current node.
 * @param nodeIdx The index right after the current node and its value.
 * @param char The current character.
 * @returns The index of the next node, or -1 if no branch is taken.
 */
function determineBranch(decodeTree, current, nodeIdx, char) {
    const branchCount = (current & BinTrieFlags.BRANCH_LENGTH) >> 7;
    const jumpOffset = current & BinTrieFlags.JUMP_TABLE;
    // Case 1: Single branch encoded in jump offset
    if (branchCount === 0) {
        return jumpOffset !== 0 && char === jumpOffset ? nodeIdx : -1;
    }
    // Case 2: Multiple branches encoded in jump table
    if (jumpOffset) {
        const value = char - jumpOffset;
        return value < 0 || value >= branchCount
            ? -1
            : decodeTree[nodeIdx + value] - 1;
    }
    // Case 3: Multiple branches encoded in dictionary
    // Binary search for the character.
    let lo = nodeIdx;
    let hi = lo + branchCount - 1;
    while (lo <= hi) {
        const mid = (lo + hi) >>> 1;
        const midVal = decodeTree[mid];
        if (midVal < char) {
            lo = mid + 1;
        }
        else if (midVal > char) {
            hi = mid - 1;
        }
        else {
            return decodeTree[mid + branchCount];
        }
    }
    return -1;
}
getDecoder(htmlDecodeTree);
getDecoder(xmlDecodeTree);

var CharCodes;
(function (CharCodes) {
    CharCodes[CharCodes["Tab"] = 9] = "Tab";
    CharCodes[CharCodes["NewLine"] = 10] = "NewLine";
    CharCodes[CharCodes["FormFeed"] = 12] = "FormFeed";
    CharCodes[CharCodes["CarriageReturn"] = 13] = "CarriageReturn";
    CharCodes[CharCodes["Space"] = 32] = "Space";
    CharCodes[CharCodes["ExclamationMark"] = 33] = "ExclamationMark";
    CharCodes[CharCodes["Number"] = 35] = "Number";
    CharCodes[CharCodes["Amp"] = 38] = "Amp";
    CharCodes[CharCodes["SingleQuote"] = 39] = "SingleQuote";
    CharCodes[CharCodes["DoubleQuote"] = 34] = "DoubleQuote";
    CharCodes[CharCodes["Dash"] = 45] = "Dash";
    CharCodes[CharCodes["Slash"] = 47] = "Slash";
    CharCodes[CharCodes["Zero"] = 48] = "Zero";
    CharCodes[CharCodes["Nine"] = 57] = "Nine";
    CharCodes[CharCodes["Semi"] = 59] = "Semi";
    CharCodes[CharCodes["Lt"] = 60] = "Lt";
    CharCodes[CharCodes["Eq"] = 61] = "Eq";
    CharCodes[CharCodes["Gt"] = 62] = "Gt";
    CharCodes[CharCodes["Questionmark"] = 63] = "Questionmark";
    CharCodes[CharCodes["UpperA"] = 65] = "UpperA";
    CharCodes[CharCodes["LowerA"] = 97] = "LowerA";
    CharCodes[CharCodes["UpperF"] = 70] = "UpperF";
    CharCodes[CharCodes["LowerF"] = 102] = "LowerF";
    CharCodes[CharCodes["UpperZ"] = 90] = "UpperZ";
    CharCodes[CharCodes["LowerZ"] = 122] = "LowerZ";
    CharCodes[CharCodes["LowerX"] = 120] = "LowerX";
    CharCodes[CharCodes["OpeningSquareBracket"] = 91] = "OpeningSquareBracket";
})(CharCodes || (CharCodes = {}));
/** All the states the tokenizer can be in. */
var State;
(function (State) {
    State[State["Text"] = 1] = "Text";
    State[State["BeforeTagName"] = 2] = "BeforeTagName";
    State[State["InTagName"] = 3] = "InTagName";
    State[State["InSelfClosingTag"] = 4] = "InSelfClosingTag";
    State[State["BeforeClosingTagName"] = 5] = "BeforeClosingTagName";
    State[State["InClosingTagName"] = 6] = "InClosingTagName";
    State[State["AfterClosingTagName"] = 7] = "AfterClosingTagName";
    // Attributes
    State[State["BeforeAttributeName"] = 8] = "BeforeAttributeName";
    State[State["InAttributeName"] = 9] = "InAttributeName";
    State[State["AfterAttributeName"] = 10] = "AfterAttributeName";
    State[State["BeforeAttributeValue"] = 11] = "BeforeAttributeValue";
    State[State["InAttributeValueDq"] = 12] = "InAttributeValueDq";
    State[State["InAttributeValueSq"] = 13] = "InAttributeValueSq";
    State[State["InAttributeValueNq"] = 14] = "InAttributeValueNq";
    // Declarations
    State[State["BeforeDeclaration"] = 15] = "BeforeDeclaration";
    State[State["InDeclaration"] = 16] = "InDeclaration";
    // Processing instructions
    State[State["InProcessingInstruction"] = 17] = "InProcessingInstruction";
    // Comments & CDATA
    State[State["BeforeComment"] = 18] = "BeforeComment";
    State[State["CDATASequence"] = 19] = "CDATASequence";
    State[State["InSpecialComment"] = 20] = "InSpecialComment";
    State[State["InCommentLike"] = 21] = "InCommentLike";
    // Special tags
    State[State["BeforeSpecialS"] = 22] = "BeforeSpecialS";
    State[State["BeforeSpecialT"] = 23] = "BeforeSpecialT";
    State[State["SpecialStartSequence"] = 24] = "SpecialStartSequence";
    State[State["InSpecialTag"] = 25] = "InSpecialTag";
    State[State["InEntity"] = 26] = "InEntity";
})(State || (State = {}));
function isWhitespace$1(c) {
    return (c === CharCodes.Space ||
        c === CharCodes.NewLine ||
        c === CharCodes.Tab ||
        c === CharCodes.FormFeed ||
        c === CharCodes.CarriageReturn);
}
function isEndOfTagSection(c) {
    return c === CharCodes.Slash || c === CharCodes.Gt || isWhitespace$1(c);
}
function isASCIIAlpha(c) {
    return ((c >= CharCodes.LowerA && c <= CharCodes.LowerZ) ||
        (c >= CharCodes.UpperA && c <= CharCodes.UpperZ));
}
var QuoteType;
(function (QuoteType) {
    QuoteType[QuoteType["NoValue"] = 0] = "NoValue";
    QuoteType[QuoteType["Unquoted"] = 1] = "Unquoted";
    QuoteType[QuoteType["Single"] = 2] = "Single";
    QuoteType[QuoteType["Double"] = 3] = "Double";
})(QuoteType || (QuoteType = {}));
/**
 * Sequences used to match longer strings.
 *
 * We don't have `Script`, `Style`, or `Title` here. Instead, we re-use the *End
 * sequences with an increased offset.
 */
const Sequences = {
    Cdata: new Uint8Array([0x43, 0x44, 0x41, 0x54, 0x41, 0x5b]), // CDATA[
    CdataEnd: new Uint8Array([0x5d, 0x5d, 0x3e]), // ]]>
    CommentEnd: new Uint8Array([0x2d, 0x2d, 0x3e]), // `-->`
    ScriptEnd: new Uint8Array([0x3c, 0x2f, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74]), // `</script`
    StyleEnd: new Uint8Array([0x3c, 0x2f, 0x73, 0x74, 0x79, 0x6c, 0x65]), // `</style`
    TitleEnd: new Uint8Array([0x3c, 0x2f, 0x74, 0x69, 0x74, 0x6c, 0x65]), // `</title`
    TextareaEnd: new Uint8Array([
        0x3c, 0x2f, 0x74, 0x65, 0x78, 0x74, 0x61, 0x72, 0x65, 0x61,
    ]), // `</textarea`
};
class Tokenizer {
    constructor({ xmlMode = false, decodeEntities = true, }, cbs) {
        this.cbs = cbs;
        /** The current state the tokenizer is in. */
        this.state = State.Text;
        /** The read buffer. */
        this.buffer = "";
        /** The beginning of the section that is currently being read. */
        this.sectionStart = 0;
        /** The index within the buffer that we are currently looking at. */
        this.index = 0;
        /** The start of the last entity. */
        this.entityStart = 0;
        /** Some behavior, eg. when decoding entities, is done while we are in another state. This keeps track of the other state type. */
        this.baseState = State.Text;
        /** For special parsing behavior inside of script and style tags. */
        this.isSpecial = false;
        /** Indicates whether the tokenizer has been paused. */
        this.running = true;
        /** The offset of the current buffer. */
        this.offset = 0;
        this.currentSequence = undefined;
        this.sequenceIndex = 0;
        this.xmlMode = xmlMode;
        this.decodeEntities = decodeEntities;
        this.entityDecoder = new EntityDecoder(xmlMode ? xmlDecodeTree : htmlDecodeTree, (cp, consumed) => this.emitCodePoint(cp, consumed));
    }
    reset() {
        this.state = State.Text;
        this.buffer = "";
        this.sectionStart = 0;
        this.index = 0;
        this.baseState = State.Text;
        this.currentSequence = undefined;
        this.running = true;
        this.offset = 0;
    }
    write(chunk) {
        this.offset += this.buffer.length;
        this.buffer = chunk;
        this.parse();
    }
    end() {
        if (this.running)
            this.finish();
    }
    pause() {
        this.running = false;
    }
    resume() {
        this.running = true;
        if (this.index < this.buffer.length + this.offset) {
            this.parse();
        }
    }
    stateText(c) {
        if (c === CharCodes.Lt ||
            (!this.decodeEntities && this.fastForwardTo(CharCodes.Lt))) {
            if (this.index > this.sectionStart) {
                this.cbs.ontext(this.sectionStart, this.index);
            }
            this.state = State.BeforeTagName;
            this.sectionStart = this.index;
        }
        else if (this.decodeEntities && c === CharCodes.Amp) {
            this.startEntity();
        }
    }
    stateSpecialStartSequence(c) {
        const isEnd = this.sequenceIndex === this.currentSequence.length;
        const isMatch = isEnd
            ? // If we are at the end of the sequence, make sure the tag name has ended
                isEndOfTagSection(c)
            : // Otherwise, do a case-insensitive comparison
                (c | 0x20) === this.currentSequence[this.sequenceIndex];
        if (!isMatch) {
            this.isSpecial = false;
        }
        else if (!isEnd) {
            this.sequenceIndex++;
            return;
        }
        this.sequenceIndex = 0;
        this.state = State.InTagName;
        this.stateInTagName(c);
    }
    /** Look for an end tag. For <title> tags, also decode entities. */
    stateInSpecialTag(c) {
        if (this.sequenceIndex === this.currentSequence.length) {
            if (c === CharCodes.Gt || isWhitespace$1(c)) {
                const endOfText = this.index - this.currentSequence.length;
                if (this.sectionStart < endOfText) {
                    // Spoof the index so that reported locations match up.
                    const actualIndex = this.index;
                    this.index = endOfText;
                    this.cbs.ontext(this.sectionStart, endOfText);
                    this.index = actualIndex;
                }
                this.isSpecial = false;
                this.sectionStart = endOfText + 2; // Skip over the `</`
                this.stateInClosingTagName(c);
                return; // We are done; skip the rest of the function.
            }
            this.sequenceIndex = 0;
        }
        if ((c | 0x20) === this.currentSequence[this.sequenceIndex]) {
            this.sequenceIndex += 1;
        }
        else if (this.sequenceIndex === 0) {
            if (this.currentSequence === Sequences.TitleEnd) {
                // We have to parse entities in <title> tags.
                if (this.decodeEntities && c === CharCodes.Amp) {
                    this.startEntity();
                }
            }
            else if (this.fastForwardTo(CharCodes.Lt)) {
                // Outside of <title> tags, we can fast-forward.
                this.sequenceIndex = 1;
            }
        }
        else {
            // If we see a `<`, set the sequence index to 1; useful for eg. `<</script>`.
            this.sequenceIndex = Number(c === CharCodes.Lt);
        }
    }
    stateCDATASequence(c) {
        if (c === Sequences.Cdata[this.sequenceIndex]) {
            if (++this.sequenceIndex === Sequences.Cdata.length) {
                this.state = State.InCommentLike;
                this.currentSequence = Sequences.CdataEnd;
                this.sequenceIndex = 0;
                this.sectionStart = this.index + 1;
            }
        }
        else {
            this.sequenceIndex = 0;
            this.state = State.InDeclaration;
            this.stateInDeclaration(c); // Reconsume the character
        }
    }
    /**
     * When we wait for one specific character, we can speed things up
     * by skipping through the buffer until we find it.
     *
     * @returns Whether the character was found.
     */
    fastForwardTo(c) {
        while (++this.index < this.buffer.length + this.offset) {
            if (this.buffer.charCodeAt(this.index - this.offset) === c) {
                return true;
            }
        }
        /*
         * We increment the index at the end of the `parse` loop,
         * so set it to `buffer.length - 1` here.
         *
         * TODO: Refactor `parse` to increment index before calling states.
         */
        this.index = this.buffer.length + this.offset - 1;
        return false;
    }
    /**
     * Comments and CDATA end with `-->` and `]]>`.
     *
     * Their common qualities are:
     * - Their end sequences have a distinct character they start with.
     * - That character is then repeated, so we have to check multiple repeats.
     * - All characters but the start character of the sequence can be skipped.
     */
    stateInCommentLike(c) {
        if (c === this.currentSequence[this.sequenceIndex]) {
            if (++this.sequenceIndex === this.currentSequence.length) {
                if (this.currentSequence === Sequences.CdataEnd) {
                    this.cbs.oncdata(this.sectionStart, this.index, 2);
                }
                else {
                    this.cbs.oncomment(this.sectionStart, this.index, 2);
                }
                this.sequenceIndex = 0;
                this.sectionStart = this.index + 1;
                this.state = State.Text;
            }
        }
        else if (this.sequenceIndex === 0) {
            // Fast-forward to the first character of the sequence
            if (this.fastForwardTo(this.currentSequence[0])) {
                this.sequenceIndex = 1;
            }
        }
        else if (c !== this.currentSequence[this.sequenceIndex - 1]) {
            // Allow long sequences, eg. --->, ]]]>
            this.sequenceIndex = 0;
        }
    }
    /**
     * HTML only allows ASCII alpha characters (a-z and A-Z) at the beginning of a tag name.
     *
     * XML allows a lot more characters here (@see https://www.w3.org/TR/REC-xml/#NT-NameStartChar).
     * We allow anything that wouldn't end the tag.
     */
    isTagStartChar(c) {
        return this.xmlMode ? !isEndOfTagSection(c) : isASCIIAlpha(c);
    }
    startSpecial(sequence, offset) {
        this.isSpecial = true;
        this.currentSequence = sequence;
        this.sequenceIndex = offset;
        this.state = State.SpecialStartSequence;
    }
    stateBeforeTagName(c) {
        if (c === CharCodes.ExclamationMark) {
            this.state = State.BeforeDeclaration;
            this.sectionStart = this.index + 1;
        }
        else if (c === CharCodes.Questionmark) {
            this.state = State.InProcessingInstruction;
            this.sectionStart = this.index + 1;
        }
        else if (this.isTagStartChar(c)) {
            const lower = c | 0x20;
            this.sectionStart = this.index;
            if (this.xmlMode) {
                this.state = State.InTagName;
            }
            else if (lower === Sequences.ScriptEnd[2]) {
                this.state = State.BeforeSpecialS;
            }
            else if (lower === Sequences.TitleEnd[2]) {
                this.state = State.BeforeSpecialT;
            }
            else {
                this.state = State.InTagName;
            }
        }
        else if (c === CharCodes.Slash) {
            this.state = State.BeforeClosingTagName;
        }
        else {
            this.state = State.Text;
            this.stateText(c);
        }
    }
    stateInTagName(c) {
        if (isEndOfTagSection(c)) {
            this.cbs.onopentagname(this.sectionStart, this.index);
            this.sectionStart = -1;
            this.state = State.BeforeAttributeName;
            this.stateBeforeAttributeName(c);
        }
    }
    stateBeforeClosingTagName(c) {
        if (isWhitespace$1(c)) ;
        else if (c === CharCodes.Gt) {
            this.state = State.Text;
        }
        else {
            this.state = this.isTagStartChar(c)
                ? State.InClosingTagName
                : State.InSpecialComment;
            this.sectionStart = this.index;
        }
    }
    stateInClosingTagName(c) {
        if (c === CharCodes.Gt || isWhitespace$1(c)) {
            this.cbs.onclosetag(this.sectionStart, this.index);
            this.sectionStart = -1;
            this.state = State.AfterClosingTagName;
            this.stateAfterClosingTagName(c);
        }
    }
    stateAfterClosingTagName(c) {
        // Skip everything until ">"
        if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
            this.state = State.Text;
            this.sectionStart = this.index + 1;
        }
    }
    stateBeforeAttributeName(c) {
        if (c === CharCodes.Gt) {
            this.cbs.onopentagend(this.index);
            if (this.isSpecial) {
                this.state = State.InSpecialTag;
                this.sequenceIndex = 0;
            }
            else {
                this.state = State.Text;
            }
            this.sectionStart = this.index + 1;
        }
        else if (c === CharCodes.Slash) {
            this.state = State.InSelfClosingTag;
        }
        else if (!isWhitespace$1(c)) {
            this.state = State.InAttributeName;
            this.sectionStart = this.index;
        }
    }
    stateInSelfClosingTag(c) {
        if (c === CharCodes.Gt) {
            this.cbs.onselfclosingtag(this.index);
            this.state = State.Text;
            this.sectionStart = this.index + 1;
            this.isSpecial = false; // Reset special state, in case of self-closing special tags
        }
        else if (!isWhitespace$1(c)) {
            this.state = State.BeforeAttributeName;
            this.stateBeforeAttributeName(c);
        }
    }
    stateInAttributeName(c) {
        if (c === CharCodes.Eq || isEndOfTagSection(c)) {
            this.cbs.onattribname(this.sectionStart, this.index);
            this.sectionStart = this.index;
            this.state = State.AfterAttributeName;
            this.stateAfterAttributeName(c);
        }
    }
    stateAfterAttributeName(c) {
        if (c === CharCodes.Eq) {
            this.state = State.BeforeAttributeValue;
        }
        else if (c === CharCodes.Slash || c === CharCodes.Gt) {
            this.cbs.onattribend(QuoteType.NoValue, this.sectionStart);
            this.sectionStart = -1;
            this.state = State.BeforeAttributeName;
            this.stateBeforeAttributeName(c);
        }
        else if (!isWhitespace$1(c)) {
            this.cbs.onattribend(QuoteType.NoValue, this.sectionStart);
            this.state = State.InAttributeName;
            this.sectionStart = this.index;
        }
    }
    stateBeforeAttributeValue(c) {
        if (c === CharCodes.DoubleQuote) {
            this.state = State.InAttributeValueDq;
            this.sectionStart = this.index + 1;
        }
        else if (c === CharCodes.SingleQuote) {
            this.state = State.InAttributeValueSq;
            this.sectionStart = this.index + 1;
        }
        else if (!isWhitespace$1(c)) {
            this.sectionStart = this.index;
            this.state = State.InAttributeValueNq;
            this.stateInAttributeValueNoQuotes(c); // Reconsume token
        }
    }
    handleInAttributeValue(c, quote) {
        if (c === quote ||
            (!this.decodeEntities && this.fastForwardTo(quote))) {
            this.cbs.onattribdata(this.sectionStart, this.index);
            this.sectionStart = -1;
            this.cbs.onattribend(quote === CharCodes.DoubleQuote
                ? QuoteType.Double
                : QuoteType.Single, this.index + 1);
            this.state = State.BeforeAttributeName;
        }
        else if (this.decodeEntities && c === CharCodes.Amp) {
            this.startEntity();
        }
    }
    stateInAttributeValueDoubleQuotes(c) {
        this.handleInAttributeValue(c, CharCodes.DoubleQuote);
    }
    stateInAttributeValueSingleQuotes(c) {
        this.handleInAttributeValue(c, CharCodes.SingleQuote);
    }
    stateInAttributeValueNoQuotes(c) {
        if (isWhitespace$1(c) || c === CharCodes.Gt) {
            this.cbs.onattribdata(this.sectionStart, this.index);
            this.sectionStart = -1;
            this.cbs.onattribend(QuoteType.Unquoted, this.index);
            this.state = State.BeforeAttributeName;
            this.stateBeforeAttributeName(c);
        }
        else if (this.decodeEntities && c === CharCodes.Amp) {
            this.startEntity();
        }
    }
    stateBeforeDeclaration(c) {
        if (c === CharCodes.OpeningSquareBracket) {
            this.state = State.CDATASequence;
            this.sequenceIndex = 0;
        }
        else {
            this.state =
                c === CharCodes.Dash
                    ? State.BeforeComment
                    : State.InDeclaration;
        }
    }
    stateInDeclaration(c) {
        if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
            this.cbs.ondeclaration(this.sectionStart, this.index);
            this.state = State.Text;
            this.sectionStart = this.index + 1;
        }
    }
    stateInProcessingInstruction(c) {
        if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
            this.cbs.onprocessinginstruction(this.sectionStart, this.index);
            this.state = State.Text;
            this.sectionStart = this.index + 1;
        }
    }
    stateBeforeComment(c) {
        if (c === CharCodes.Dash) {
            this.state = State.InCommentLike;
            this.currentSequence = Sequences.CommentEnd;
            // Allow short comments (eg. <!-->)
            this.sequenceIndex = 2;
            this.sectionStart = this.index + 1;
        }
        else {
            this.state = State.InDeclaration;
        }
    }
    stateInSpecialComment(c) {
        if (c === CharCodes.Gt || this.fastForwardTo(CharCodes.Gt)) {
            this.cbs.oncomment(this.sectionStart, this.index, 0);
            this.state = State.Text;
            this.sectionStart = this.index + 1;
        }
    }
    stateBeforeSpecialS(c) {
        const lower = c | 0x20;
        if (lower === Sequences.ScriptEnd[3]) {
            this.startSpecial(Sequences.ScriptEnd, 4);
        }
        else if (lower === Sequences.StyleEnd[3]) {
            this.startSpecial(Sequences.StyleEnd, 4);
        }
        else {
            this.state = State.InTagName;
            this.stateInTagName(c); // Consume the token again
        }
    }
    stateBeforeSpecialT(c) {
        const lower = c | 0x20;
        if (lower === Sequences.TitleEnd[3]) {
            this.startSpecial(Sequences.TitleEnd, 4);
        }
        else if (lower === Sequences.TextareaEnd[3]) {
            this.startSpecial(Sequences.TextareaEnd, 4);
        }
        else {
            this.state = State.InTagName;
            this.stateInTagName(c); // Consume the token again
        }
    }
    startEntity() {
        this.baseState = this.state;
        this.state = State.InEntity;
        this.entityStart = this.index;
        this.entityDecoder.startEntity(this.xmlMode
            ? DecodingMode.Strict
            : this.baseState === State.Text ||
                this.baseState === State.InSpecialTag
                ? DecodingMode.Legacy
                : DecodingMode.Attribute);
    }
    stateInEntity() {
        const length = this.entityDecoder.write(this.buffer, this.index - this.offset);
        // If `length` is positive, we are done with the entity.
        if (length >= 0) {
            this.state = this.baseState;
            if (length === 0) {
                this.index = this.entityStart;
            }
        }
        else {
            // Mark buffer as consumed.
            this.index = this.offset + this.buffer.length - 1;
        }
    }
    /**
     * Remove data that has already been consumed from the buffer.
     */
    cleanup() {
        // If we are inside of text or attributes, emit what we already have.
        if (this.running && this.sectionStart !== this.index) {
            if (this.state === State.Text ||
                (this.state === State.InSpecialTag && this.sequenceIndex === 0)) {
                this.cbs.ontext(this.sectionStart, this.index);
                this.sectionStart = this.index;
            }
            else if (this.state === State.InAttributeValueDq ||
                this.state === State.InAttributeValueSq ||
                this.state === State.InAttributeValueNq) {
                this.cbs.onattribdata(this.sectionStart, this.index);
                this.sectionStart = this.index;
            }
        }
    }
    shouldContinue() {
        return this.index < this.buffer.length + this.offset && this.running;
    }
    /**
     * Iterates through the buffer, calling the function corresponding to the current state.
     *
     * States that are more likely to be hit are higher up, as a performance improvement.
     */
    parse() {
        while (this.shouldContinue()) {
            const c = this.buffer.charCodeAt(this.index - this.offset);
            switch (this.state) {
                case State.Text: {
                    this.stateText(c);
                    break;
                }
                case State.SpecialStartSequence: {
                    this.stateSpecialStartSequence(c);
                    break;
                }
                case State.InSpecialTag: {
                    this.stateInSpecialTag(c);
                    break;
                }
                case State.CDATASequence: {
                    this.stateCDATASequence(c);
                    break;
                }
                case State.InAttributeValueDq: {
                    this.stateInAttributeValueDoubleQuotes(c);
                    break;
                }
                case State.InAttributeName: {
                    this.stateInAttributeName(c);
                    break;
                }
                case State.InCommentLike: {
                    this.stateInCommentLike(c);
                    break;
                }
                case State.InSpecialComment: {
                    this.stateInSpecialComment(c);
                    break;
                }
                case State.BeforeAttributeName: {
                    this.stateBeforeAttributeName(c);
                    break;
                }
                case State.InTagName: {
                    this.stateInTagName(c);
                    break;
                }
                case State.InClosingTagName: {
                    this.stateInClosingTagName(c);
                    break;
                }
                case State.BeforeTagName: {
                    this.stateBeforeTagName(c);
                    break;
                }
                case State.AfterAttributeName: {
                    this.stateAfterAttributeName(c);
                    break;
                }
                case State.InAttributeValueSq: {
                    this.stateInAttributeValueSingleQuotes(c);
                    break;
                }
                case State.BeforeAttributeValue: {
                    this.stateBeforeAttributeValue(c);
                    break;
                }
                case State.BeforeClosingTagName: {
                    this.stateBeforeClosingTagName(c);
                    break;
                }
                case State.AfterClosingTagName: {
                    this.stateAfterClosingTagName(c);
                    break;
                }
                case State.BeforeSpecialS: {
                    this.stateBeforeSpecialS(c);
                    break;
                }
                case State.BeforeSpecialT: {
                    this.stateBeforeSpecialT(c);
                    break;
                }
                case State.InAttributeValueNq: {
                    this.stateInAttributeValueNoQuotes(c);
                    break;
                }
                case State.InSelfClosingTag: {
                    this.stateInSelfClosingTag(c);
                    break;
                }
                case State.InDeclaration: {
                    this.stateInDeclaration(c);
                    break;
                }
                case State.BeforeDeclaration: {
                    this.stateBeforeDeclaration(c);
                    break;
                }
                case State.BeforeComment: {
                    this.stateBeforeComment(c);
                    break;
                }
                case State.InProcessingInstruction: {
                    this.stateInProcessingInstruction(c);
                    break;
                }
                case State.InEntity: {
                    this.stateInEntity();
                    break;
                }
            }
            this.index++;
        }
        this.cleanup();
    }
    finish() {
        if (this.state === State.InEntity) {
            this.entityDecoder.end();
            this.state = this.baseState;
        }
        this.handleTrailingData();
        this.cbs.onend();
    }
    /** Handle any trailing data. */
    handleTrailingData() {
        const endIndex = this.buffer.length + this.offset;
        // If there is no remaining data, we are done.
        if (this.sectionStart >= endIndex) {
            return;
        }
        if (this.state === State.InCommentLike) {
            if (this.currentSequence === Sequences.CdataEnd) {
                this.cbs.oncdata(this.sectionStart, endIndex, 0);
            }
            else {
                this.cbs.oncomment(this.sectionStart, endIndex, 0);
            }
        }
        else if (this.state === State.InTagName ||
            this.state === State.BeforeAttributeName ||
            this.state === State.BeforeAttributeValue ||
            this.state === State.AfterAttributeName ||
            this.state === State.InAttributeName ||
            this.state === State.InAttributeValueSq ||
            this.state === State.InAttributeValueDq ||
            this.state === State.InAttributeValueNq ||
            this.state === State.InClosingTagName) ;
        else {
            this.cbs.ontext(this.sectionStart, endIndex);
        }
    }
    emitCodePoint(cp, consumed) {
        if (this.baseState !== State.Text &&
            this.baseState !== State.InSpecialTag) {
            if (this.sectionStart < this.entityStart) {
                this.cbs.onattribdata(this.sectionStart, this.entityStart);
            }
            this.sectionStart = this.entityStart + consumed;
            this.index = this.sectionStart - 1;
            this.cbs.onattribentity(cp);
        }
        else {
            if (this.sectionStart < this.entityStart) {
                this.cbs.ontext(this.sectionStart, this.entityStart);
            }
            this.sectionStart = this.entityStart + consumed;
            this.index = this.sectionStart - 1;
            this.cbs.ontextentity(cp, this.sectionStart);
        }
    }
}

const formTags = new Set([
    "input",
    "option",
    "optgroup",
    "select",
    "button",
    "datalist",
    "textarea",
]);
const pTag = new Set(["p"]);
const tableSectionTags = new Set(["thead", "tbody"]);
const ddtTags = new Set(["dd", "dt"]);
const rtpTags = new Set(["rt", "rp"]);
const openImpliesClose = new Map([
    ["tr", new Set(["tr", "th", "td"])],
    ["th", new Set(["th"])],
    ["td", new Set(["thead", "th", "td"])],
    ["body", new Set(["head", "link", "script"])],
    ["li", new Set(["li"])],
    ["p", pTag],
    ["h1", pTag],
    ["h2", pTag],
    ["h3", pTag],
    ["h4", pTag],
    ["h5", pTag],
    ["h6", pTag],
    ["select", formTags],
    ["input", formTags],
    ["output", formTags],
    ["button", formTags],
    ["datalist", formTags],
    ["textarea", formTags],
    ["option", new Set(["option"])],
    ["optgroup", new Set(["optgroup", "option"])],
    ["dd", ddtTags],
    ["dt", ddtTags],
    ["address", pTag],
    ["article", pTag],
    ["aside", pTag],
    ["blockquote", pTag],
    ["details", pTag],
    ["div", pTag],
    ["dl", pTag],
    ["fieldset", pTag],
    ["figcaption", pTag],
    ["figure", pTag],
    ["footer", pTag],
    ["form", pTag],
    ["header", pTag],
    ["hr", pTag],
    ["main", pTag],
    ["nav", pTag],
    ["ol", pTag],
    ["pre", pTag],
    ["section", pTag],
    ["table", pTag],
    ["ul", pTag],
    ["rt", rtpTags],
    ["rp", rtpTags],
    ["tbody", tableSectionTags],
    ["tfoot", tableSectionTags],
]);
const voidElements$1 = new Set([
    "area",
    "base",
    "basefont",
    "br",
    "col",
    "command",
    "embed",
    "frame",
    "hr",
    "img",
    "input",
    "isindex",
    "keygen",
    "link",
    "meta",
    "param",
    "source",
    "track",
    "wbr",
]);
const foreignContextElements = new Set(["math", "svg"]);
const htmlIntegrationElements = new Set([
    "mi",
    "mo",
    "mn",
    "ms",
    "mtext",
    "annotation-xml",
    "foreignobject",
    "desc",
    "title",
]);
const reNameEnd = /\s|\//;
let Parser$1 = class Parser {
    constructor(cbs, options = {}) {
        var _a, _b, _c, _d, _e, _f;
        this.options = options;
        /** The start index of the last event. */
        this.startIndex = 0;
        /** The end index of the last event. */
        this.endIndex = 0;
        /**
         * Store the start index of the current open tag,
         * so we can update the start index for attributes.
         */
        this.openTagStart = 0;
        this.tagname = "";
        this.attribname = "";
        this.attribvalue = "";
        this.attribs = null;
        this.stack = [];
        this.buffers = [];
        this.bufferOffset = 0;
        /** The index of the last written buffer. Used when resuming after a `pause()`. */
        this.writeIndex = 0;
        /** Indicates whether the parser has finished running / `.end` has been called. */
        this.ended = false;
        this.cbs = cbs !== null && cbs !== void 0 ? cbs : {};
        this.htmlMode = !this.options.xmlMode;
        this.lowerCaseTagNames = (_a = options.lowerCaseTags) !== null && _a !== void 0 ? _a : this.htmlMode;
        this.lowerCaseAttributeNames =
            (_b = options.lowerCaseAttributeNames) !== null && _b !== void 0 ? _b : this.htmlMode;
        this.recognizeSelfClosing =
            (_c = options.recognizeSelfClosing) !== null && _c !== void 0 ? _c : !this.htmlMode;
        this.tokenizer = new ((_d = options.Tokenizer) !== null && _d !== void 0 ? _d : Tokenizer)(this.options, this);
        this.foreignContext = [!this.htmlMode];
        (_f = (_e = this.cbs).onparserinit) === null || _f === void 0 ? void 0 : _f.call(_e, this);
    }
    // Tokenizer event handlers
    /** @internal */
    ontext(start, endIndex) {
        var _a, _b;
        const data = this.getSlice(start, endIndex);
        this.endIndex = endIndex - 1;
        (_b = (_a = this.cbs).ontext) === null || _b === void 0 ? void 0 : _b.call(_a, data);
        this.startIndex = endIndex;
    }
    /** @internal */
    ontextentity(cp, endIndex) {
        var _a, _b;
        this.endIndex = endIndex - 1;
        (_b = (_a = this.cbs).ontext) === null || _b === void 0 ? void 0 : _b.call(_a, fromCodePoint(cp));
        this.startIndex = endIndex;
    }
    /**
     * Checks if the current tag is a void element. Override this if you want
     * to specify your own additional void elements.
     */
    isVoidElement(name) {
        return this.htmlMode && voidElements$1.has(name);
    }
    /** @internal */
    onopentagname(start, endIndex) {
        this.endIndex = endIndex;
        let name = this.getSlice(start, endIndex);
        if (this.lowerCaseTagNames) {
            name = name.toLowerCase();
        }
        this.emitOpenTag(name);
    }
    emitOpenTag(name) {
        var _a, _b, _c, _d;
        this.openTagStart = this.startIndex;
        this.tagname = name;
        const impliesClose = this.htmlMode && openImpliesClose.get(name);
        if (impliesClose) {
            while (this.stack.length > 0 && impliesClose.has(this.stack[0])) {
                const element = this.stack.shift();
                (_b = (_a = this.cbs).onclosetag) === null || _b === void 0 ? void 0 : _b.call(_a, element, true);
            }
        }
        if (!this.isVoidElement(name)) {
            this.stack.unshift(name);
            if (this.htmlMode) {
                if (foreignContextElements.has(name)) {
                    this.foreignContext.unshift(true);
                }
                else if (htmlIntegrationElements.has(name)) {
                    this.foreignContext.unshift(false);
                }
            }
        }
        (_d = (_c = this.cbs).onopentagname) === null || _d === void 0 ? void 0 : _d.call(_c, name);
        if (this.cbs.onopentag)
            this.attribs = {};
    }
    endOpenTag(isImplied) {
        var _a, _b;
        this.startIndex = this.openTagStart;
        if (this.attribs) {
            (_b = (_a = this.cbs).onopentag) === null || _b === void 0 ? void 0 : _b.call(_a, this.tagname, this.attribs, isImplied);
            this.attribs = null;
        }
        if (this.cbs.onclosetag && this.isVoidElement(this.tagname)) {
            this.cbs.onclosetag(this.tagname, true);
        }
        this.tagname = "";
    }
    /** @internal */
    onopentagend(endIndex) {
        this.endIndex = endIndex;
        this.endOpenTag(false);
        // Set `startIndex` for next node
        this.startIndex = endIndex + 1;
    }
    /** @internal */
    onclosetag(start, endIndex) {
        var _a, _b, _c, _d, _e, _f, _g, _h;
        this.endIndex = endIndex;
        let name = this.getSlice(start, endIndex);
        if (this.lowerCaseTagNames) {
            name = name.toLowerCase();
        }
        if (this.htmlMode &&
            (foreignContextElements.has(name) ||
                htmlIntegrationElements.has(name))) {
            this.foreignContext.shift();
        }
        if (!this.isVoidElement(name)) {
            const pos = this.stack.indexOf(name);
            if (pos !== -1) {
                for (let index = 0; index <= pos; index++) {
                    const element = this.stack.shift();
                    // We know the stack has sufficient elements.
                    (_b = (_a = this.cbs).onclosetag) === null || _b === void 0 ? void 0 : _b.call(_a, element, index !== pos);
                }
            }
            else if (this.htmlMode && name === "p") {
                // Implicit open before close
                this.emitOpenTag("p");
                this.closeCurrentTag(true);
            }
        }
        else if (this.htmlMode && name === "br") {
            // We can't use `emitOpenTag` for implicit open, as `br` would be implicitly closed.
            (_d = (_c = this.cbs).onopentagname) === null || _d === void 0 ? void 0 : _d.call(_c, "br");
            (_f = (_e = this.cbs).onopentag) === null || _f === void 0 ? void 0 : _f.call(_e, "br", {}, true);
            (_h = (_g = this.cbs).onclosetag) === null || _h === void 0 ? void 0 : _h.call(_g, "br", false);
        }
        // Set `startIndex` for next node
        this.startIndex = endIndex + 1;
    }
    /** @internal */
    onselfclosingtag(endIndex) {
        this.endIndex = endIndex;
        if (this.recognizeSelfClosing || this.foreignContext[0]) {
            this.closeCurrentTag(false);
            // Set `startIndex` for next node
            this.startIndex = endIndex + 1;
        }
        else {
            // Ignore the fact that the tag is self-closing.
            this.onopentagend(endIndex);
        }
    }
    closeCurrentTag(isOpenImplied) {
        var _a, _b;
        const name = this.tagname;
        this.endOpenTag(isOpenImplied);
        // Self-closing tags will be on the top of the stack
        if (this.stack[0] === name) {
            // If the opening tag isn't implied, the closing tag has to be implied.
            (_b = (_a = this.cbs).onclosetag) === null || _b === void 0 ? void 0 : _b.call(_a, name, !isOpenImplied);
            this.stack.shift();
        }
    }
    /** @internal */
    onattribname(start, endIndex) {
        this.startIndex = start;
        const name = this.getSlice(start, endIndex);
        this.attribname = this.lowerCaseAttributeNames
            ? name.toLowerCase()
            : name;
    }
    /** @internal */
    onattribdata(start, endIndex) {
        this.attribvalue += this.getSlice(start, endIndex);
    }
    /** @internal */
    onattribentity(cp) {
        this.attribvalue += fromCodePoint(cp);
    }
    /** @internal */
    onattribend(quote, endIndex) {
        var _a, _b;
        this.endIndex = endIndex;
        (_b = (_a = this.cbs).onattribute) === null || _b === void 0 ? void 0 : _b.call(_a, this.attribname, this.attribvalue, quote === QuoteType.Double
            ? '"'
            : quote === QuoteType.Single
                ? "'"
                : quote === QuoteType.NoValue
                    ? undefined
                    : null);
        if (this.attribs &&
            !Object.prototype.hasOwnProperty.call(this.attribs, this.attribname)) {
            this.attribs[this.attribname] = this.attribvalue;
        }
        this.attribvalue = "";
    }
    getInstructionName(value) {
        const index = value.search(reNameEnd);
        let name = index < 0 ? value : value.substr(0, index);
        if (this.lowerCaseTagNames) {
            name = name.toLowerCase();
        }
        return name;
    }
    /** @internal */
    ondeclaration(start, endIndex) {
        this.endIndex = endIndex;
        const value = this.getSlice(start, endIndex);
        if (this.cbs.onprocessinginstruction) {
            const name = this.getInstructionName(value);
            this.cbs.onprocessinginstruction(`!${name}`, `!${value}`);
        }
        // Set `startIndex` for next node
        this.startIndex = endIndex + 1;
    }
    /** @internal */
    onprocessinginstruction(start, endIndex) {
        this.endIndex = endIndex;
        const value = this.getSlice(start, endIndex);
        if (this.cbs.onprocessinginstruction) {
            const name = this.getInstructionName(value);
            this.cbs.onprocessinginstruction(`?${name}`, `?${value}`);
        }
        // Set `startIndex` for next node
        this.startIndex = endIndex + 1;
    }
    /** @internal */
    oncomment(start, endIndex, offset) {
        var _a, _b, _c, _d;
        this.endIndex = endIndex;
        (_b = (_a = this.cbs).oncomment) === null || _b === void 0 ? void 0 : _b.call(_a, this.getSlice(start, endIndex - offset));
        (_d = (_c = this.cbs).oncommentend) === null || _d === void 0 ? void 0 : _d.call(_c);
        // Set `startIndex` for next node
        this.startIndex = endIndex + 1;
    }
    /** @internal */
    oncdata(start, endIndex, offset) {
        var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k;
        this.endIndex = endIndex;
        const value = this.getSlice(start, endIndex - offset);
        if (!this.htmlMode || this.options.recognizeCDATA) {
            (_b = (_a = this.cbs).oncdatastart) === null || _b === void 0 ? void 0 : _b.call(_a);
            (_d = (_c = this.cbs).ontext) === null || _d === void 0 ? void 0 : _d.call(_c, value);
            (_f = (_e = this.cbs).oncdataend) === null || _f === void 0 ? void 0 : _f.call(_e);
        }
        else {
            (_h = (_g = this.cbs).oncomment) === null || _h === void 0 ? void 0 : _h.call(_g, `[CDATA[${value}]]`);
            (_k = (_j = this.cbs).oncommentend) === null || _k === void 0 ? void 0 : _k.call(_j);
        }
        // Set `startIndex` for next node
        this.startIndex = endIndex + 1;
    }
    /** @internal */
    onend() {
        var _a, _b;
        if (this.cbs.onclosetag) {
            // Set the end index for all remaining tags
            this.endIndex = this.startIndex;
            for (let index = 0; index < this.stack.length; index++) {
                this.cbs.onclosetag(this.stack[index], true);
            }
        }
        (_b = (_a = this.cbs).onend) === null || _b === void 0 ? void 0 : _b.call(_a);
    }
    /**
     * Resets the parser to a blank state, ready to parse a new HTML document
     */
    reset() {
        var _a, _b, _c, _d;
        (_b = (_a = this.cbs).onreset) === null || _b === void 0 ? void 0 : _b.call(_a);
        this.tokenizer.reset();
        this.tagname = "";
        this.attribname = "";
        this.attribs = null;
        this.stack.length = 0;
        this.startIndex = 0;
        this.endIndex = 0;
        (_d = (_c = this.cbs).onparserinit) === null || _d === void 0 ? void 0 : _d.call(_c, this);
        this.buffers.length = 0;
        this.foreignContext.length = 0;
        this.foreignContext.unshift(!this.htmlMode);
        this.bufferOffset = 0;
        this.writeIndex = 0;
        this.ended = false;
    }
    /**
     * Resets the parser, then parses a complete document and
     * pushes it to the handler.
     *
     * @param data Document to parse.
     */
    parseComplete(data) {
        this.reset();
        this.end(data);
    }
    getSlice(start, end) {
        while (start - this.bufferOffset >= this.buffers[0].length) {
            this.shiftBuffer();
        }
        let slice = this.buffers[0].slice(start - this.bufferOffset, end - this.bufferOffset);
        while (end - this.bufferOffset > this.buffers[0].length) {
            this.shiftBuffer();
            slice += this.buffers[0].slice(0, end - this.bufferOffset);
        }
        return slice;
    }
    shiftBuffer() {
        this.bufferOffset += this.buffers[0].length;
        this.writeIndex--;
        this.buffers.shift();
    }
    /**
     * Parses a chunk of data and calls the corresponding callbacks.
     *
     * @param chunk Chunk to parse.
     */
    write(chunk) {
        var _a, _b;
        if (this.ended) {
            (_b = (_a = this.cbs).onerror) === null || _b === void 0 ? void 0 : _b.call(_a, new Error(".write() after done!"));
            return;
        }
        this.buffers.push(chunk);
        if (this.tokenizer.running) {
            this.tokenizer.write(chunk);
            this.writeIndex++;
        }
    }
    /**
     * Parses the end of the buffer and clears the stack, calls onend.
     *
     * @param chunk Optional final chunk to parse.
     */
    end(chunk) {
        var _a, _b;
        if (this.ended) {
            (_b = (_a = this.cbs).onerror) === null || _b === void 0 ? void 0 : _b.call(_a, new Error(".end() after done!"));
            return;
        }
        if (chunk)
            this.write(chunk);
        this.ended = true;
        this.tokenizer.end();
    }
    /**
     * Pauses parsing. The parser won't emit events until `resume` is called.
     */
    pause() {
        this.tokenizer.pause();
    }
    /**
     * Resumes parsing after `pause` was called.
     */
    resume() {
        this.tokenizer.resume();
        while (this.tokenizer.running &&
            this.writeIndex < this.buffers.length) {
            this.tokenizer.write(this.buffers[this.writeIndex++]);
        }
        if (this.ended)
            this.tokenizer.end();
    }
    /**
     * Alias of `write`, for backwards compatibility.
     *
     * @param chunk Chunk to parse.
     * @deprecated
     */
    parseChunk(chunk) {
        this.write(chunk);
    }
    /**
     * Alias of `end`, for backwards compatibility.
     *
     * @param chunk Optional final chunk to parse.
     * @deprecated
     */
    done(chunk) {
        this.end(chunk);
    }
};

/** Types of elements found in htmlparser2's DOM */
var ElementType;
(function (ElementType) {
    /** Type for the root element of a document */
    ElementType["Root"] = "root";
    /** Type for Text */
    ElementType["Text"] = "text";
    /** Type for <? ... ?> */
    ElementType["Directive"] = "directive";
    /** Type for <!-- ... --> */
    ElementType["Comment"] = "comment";
    /** Type for <script> tags */
    ElementType["Script"] = "script";
    /** Type for <style> tags */
    ElementType["Style"] = "style";
    /** Type for Any tag */
    ElementType["Tag"] = "tag";
    /** Type for <![CDATA[ ... ]]> */
    ElementType["CDATA"] = "cdata";
    /** Type for <!doctype ...> */
    ElementType["Doctype"] = "doctype";
})(ElementType || (ElementType = {}));
/**
 * Tests whether an element is a tag or not.
 *
 * @param elem Element to test
 */
function isTag$2(elem) {
    return (elem.type === ElementType.Tag ||
        elem.type === ElementType.Script ||
        elem.type === ElementType.Style);
}
// Exports for backwards compatibility
/** Type for the root element of a document */
const Root = ElementType.Root;
/** Type for Text */
const Text$3 = ElementType.Text;
/** Type for <? ... ?> */
const Directive = ElementType.Directive;
/** Type for <!-- ... --> */
const Comment$3 = ElementType.Comment;
/** Type for <script> tags */
const Script = ElementType.Script;
/** Type for <style> tags */
const Style = ElementType.Style;
/** Type for Any tag */
const Tag = ElementType.Tag;
/** Type for <![CDATA[ ... ]]> */
const CDATA$1 = ElementType.CDATA;
/** Type for <!doctype ...> */
const Doctype = ElementType.Doctype;

var index = /*#__PURE__*/Object.freeze({
    __proto__: null,
    CDATA: CDATA$1,
    Comment: Comment$3,
    Directive: Directive,
    Doctype: Doctype,
    get ElementType () { return ElementType; },
    Root: Root,
    Script: Script,
    Style: Style,
    Tag: Tag,
    Text: Text$3,
    isTag: isTag$2
});

/**
 * This object will be used as the prototype for Nodes when creating a
 * DOM-Level-1-compliant structure.
 */
let Node$2 = class Node {
    constructor() {
        /** Parent of the node */
        this.parent = null;
        /** Previous sibling */
        this.prev = null;
        /** Next sibling */
        this.next = null;
        /** The start index of the node. Requires `withStartIndices` on the handler to be `true. */
        this.startIndex = null;
        /** The end index of the node. Requires `withEndIndices` on the handler to be `true. */
        this.endIndex = null;
    }
    // Read-write aliases for properties
    /**
     * Same as {@link parent}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get parentNode() {
        return this.parent;
    }
    set parentNode(parent) {
        this.parent = parent;
    }
    /**
     * Same as {@link prev}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get previousSibling() {
        return this.prev;
    }
    set previousSibling(prev) {
        this.prev = prev;
    }
    /**
     * Same as {@link next}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get nextSibling() {
        return this.next;
    }
    set nextSibling(next) {
        this.next = next;
    }
    /**
     * Clone this node, and optionally its children.
     *
     * @param recursive Clone child nodes as well.
     * @returns A clone of the node.
     */
    cloneNode(recursive = false) {
        return cloneNode(this, recursive);
    }
};
/**
 * A node that contains some data.
 */
class DataNode extends Node$2 {
    /**
     * @param data The content of the data node
     */
    constructor(data) {
        super();
        this.data = data;
    }
    /**
     * Same as {@link data}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get nodeValue() {
        return this.data;
    }
    set nodeValue(data) {
        this.data = data;
    }
}
/**
 * Text within the document.
 */
let Text$2 = class Text extends DataNode {
    constructor() {
        super(...arguments);
        this.type = ElementType.Text;
    }
    get nodeType() {
        return 3;
    }
};
/**
 * Comments within the document.
 */
let Comment$2 = class Comment extends DataNode {
    constructor() {
        super(...arguments);
        this.type = ElementType.Comment;
    }
    get nodeType() {
        return 8;
    }
};
/**
 * Processing instructions, including doc types.
 */
class ProcessingInstruction extends DataNode {
    constructor(name, data) {
        super(data);
        this.name = name;
        this.type = ElementType.Directive;
    }
    get nodeType() {
        return 1;
    }
}
/**
 * A `Node` that can have children.
 */
class NodeWithChildren extends Node$2 {
    /**
     * @param children Children of the node. Only certain node types can have children.
     */
    constructor(children) {
        super();
        this.children = children;
    }
    // Aliases
    /** First child of the node. */
    get firstChild() {
        var _a;
        return (_a = this.children[0]) !== null && _a !== void 0 ? _a : null;
    }
    /** Last child of the node. */
    get lastChild() {
        return this.children.length > 0
            ? this.children[this.children.length - 1]
            : null;
    }
    /**
     * Same as {@link children}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get childNodes() {
        return this.children;
    }
    set childNodes(children) {
        this.children = children;
    }
}
class CDATA extends NodeWithChildren {
    constructor() {
        super(...arguments);
        this.type = ElementType.CDATA;
    }
    get nodeType() {
        return 4;
    }
}
/**
 * The root node of the document.
 */
let Document$2 = class Document extends NodeWithChildren {
    constructor() {
        super(...arguments);
        this.type = ElementType.Root;
    }
    get nodeType() {
        return 9;
    }
};
/**
 * An element within the DOM.
 */
let Element$2 = class Element extends NodeWithChildren {
    /**
     * @param name Name of the tag, eg. `div`, `span`.
     * @param attribs Object mapping attribute names to attribute values.
     * @param children Children of the node.
     */
    constructor(name, attribs, children = [], type = name === "script"
        ? ElementType.Script
        : name === "style"
            ? ElementType.Style
            : ElementType.Tag) {
        super(children);
        this.name = name;
        this.attribs = attribs;
        this.type = type;
    }
    get nodeType() {
        return 1;
    }
    // DOM Level 1 aliases
    /**
     * Same as {@link name}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get tagName() {
        return this.name;
    }
    set tagName(name) {
        this.name = name;
    }
    get attributes() {
        return Object.keys(this.attribs).map((name) => {
            var _a, _b;
            return ({
                name,
                value: this.attribs[name],
                namespace: (_a = this["x-attribsNamespace"]) === null || _a === void 0 ? void 0 : _a[name],
                prefix: (_b = this["x-attribsPrefix"]) === null || _b === void 0 ? void 0 : _b[name],
            });
        });
    }
};
/**
 * @param node Node to check.
 * @returns `true` if the node is a `Element`, `false` otherwise.
 */
function isTag$1(node) {
    return isTag$2(node);
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `CDATA`, `false` otherwise.
 */
function isCDATA(node) {
    return node.type === ElementType.CDATA;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `Text`, `false` otherwise.
 */
function isText(node) {
    return node.type === ElementType.Text;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `Comment`, `false` otherwise.
 */
function isComment(node) {
    return node.type === ElementType.Comment;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `ProcessingInstruction`, `false` otherwise.
 */
function isDirective(node) {
    return node.type === ElementType.Directive;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `ProcessingInstruction`, `false` otherwise.
 */
function isDocument(node) {
    return node.type === ElementType.Root;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has children, `false` otherwise.
 */
function hasChildren(node) {
    return Object.prototype.hasOwnProperty.call(node, "children");
}
/**
 * Clone a node, and optionally its children.
 *
 * @param recursive Clone child nodes as well.
 * @returns A clone of the node.
 */
function cloneNode(node, recursive = false) {
    let result;
    if (isText(node)) {
        result = new Text$2(node.data);
    }
    else if (isComment(node)) {
        result = new Comment$2(node.data);
    }
    else if (isTag$1(node)) {
        const children = recursive ? cloneChildren(node.children) : [];
        const clone = new Element$2(node.name, { ...node.attribs }, children);
        children.forEach((child) => (child.parent = clone));
        if (node.namespace != null) {
            clone.namespace = node.namespace;
        }
        if (node["x-attribsNamespace"]) {
            clone["x-attribsNamespace"] = { ...node["x-attribsNamespace"] };
        }
        if (node["x-attribsPrefix"]) {
            clone["x-attribsPrefix"] = { ...node["x-attribsPrefix"] };
        }
        result = clone;
    }
    else if (isCDATA(node)) {
        const children = recursive ? cloneChildren(node.children) : [];
        const clone = new CDATA(children);
        children.forEach((child) => (child.parent = clone));
        result = clone;
    }
    else if (isDocument(node)) {
        const children = recursive ? cloneChildren(node.children) : [];
        const clone = new Document$2(children);
        children.forEach((child) => (child.parent = clone));
        if (node["x-mode"]) {
            clone["x-mode"] = node["x-mode"];
        }
        result = clone;
    }
    else if (isDirective(node)) {
        const instruction = new ProcessingInstruction(node.name, node.data);
        if (node["x-name"] != null) {
            instruction["x-name"] = node["x-name"];
            instruction["x-publicId"] = node["x-publicId"];
            instruction["x-systemId"] = node["x-systemId"];
        }
        result = instruction;
    }
    else {
        throw new Error(`Not implemented yet: ${node.type}`);
    }
    result.startIndex = node.startIndex;
    result.endIndex = node.endIndex;
    if (node.sourceCodeLocation != null) {
        result.sourceCodeLocation = node.sourceCodeLocation;
    }
    return result;
}
function cloneChildren(childs) {
    const children = childs.map((child) => cloneNode(child, true));
    for (let i = 1; i < children.length; i++) {
        children[i].prev = children[i - 1];
        children[i - 1].next = children[i];
    }
    return children;
}

// Default options
const defaultOpts = {
    withStartIndices: false,
    withEndIndices: false,
    xmlMode: false,
};
class DomHandler {
    /**
     * @param callback Called once parsing has completed.
     * @param options Settings for the handler.
     * @param elementCB Callback whenever a tag is closed.
     */
    constructor(callback, options, elementCB) {
        /** The elements of the DOM */
        this.dom = [];
        /** The root element for the DOM */
        this.root = new Document$2(this.dom);
        /** Indicated whether parsing has been completed. */
        this.done = false;
        /** Stack of open tags. */
        this.tagStack = [this.root];
        /** A data node that is still being written to. */
        this.lastNode = null;
        /** Reference to the parser instance. Used for location information. */
        this.parser = null;
        // Make it possible to skip arguments, for backwards-compatibility
        if (typeof options === "function") {
            elementCB = options;
            options = defaultOpts;
        }
        if (typeof callback === "object") {
            options = callback;
            callback = undefined;
        }
        this.callback = callback !== null && callback !== void 0 ? callback : null;
        this.options = options !== null && options !== void 0 ? options : defaultOpts;
        this.elementCB = elementCB !== null && elementCB !== void 0 ? elementCB : null;
    }
    onparserinit(parser) {
        this.parser = parser;
    }
    // Resets the handler back to starting state
    onreset() {
        this.dom = [];
        this.root = new Document$2(this.dom);
        this.done = false;
        this.tagStack = [this.root];
        this.lastNode = null;
        this.parser = null;
    }
    // Signals the handler that parsing is done
    onend() {
        if (this.done)
            return;
        this.done = true;
        this.parser = null;
        this.handleCallback(null);
    }
    onerror(error) {
        this.handleCallback(error);
    }
    onclosetag() {
        this.lastNode = null;
        const elem = this.tagStack.pop();
        if (this.options.withEndIndices) {
            elem.endIndex = this.parser.endIndex;
        }
        if (this.elementCB)
            this.elementCB(elem);
    }
    onopentag(name, attribs) {
        const type = this.options.xmlMode ? ElementType.Tag : undefined;
        const element = new Element$2(name, attribs, undefined, type);
        this.addNode(element);
        this.tagStack.push(element);
    }
    ontext(data) {
        const { lastNode } = this;
        if (lastNode && lastNode.type === ElementType.Text) {
            lastNode.data += data;
            if (this.options.withEndIndices) {
                lastNode.endIndex = this.parser.endIndex;
            }
        }
        else {
            const node = new Text$2(data);
            this.addNode(node);
            this.lastNode = node;
        }
    }
    oncomment(data) {
        if (this.lastNode && this.lastNode.type === ElementType.Comment) {
            this.lastNode.data += data;
            return;
        }
        const node = new Comment$2(data);
        this.addNode(node);
        this.lastNode = node;
    }
    oncommentend() {
        this.lastNode = null;
    }
    oncdatastart() {
        const text = new Text$2("");
        const node = new CDATA([text]);
        this.addNode(node);
        text.parent = node;
        this.lastNode = text;
    }
    oncdataend() {
        this.lastNode = null;
    }
    onprocessinginstruction(name, data) {
        const node = new ProcessingInstruction(name, data);
        this.addNode(node);
    }
    handleCallback(error) {
        if (typeof this.callback === "function") {
            this.callback(error, this.dom);
        }
        else if (error) {
            throw error;
        }
    }
    addNode(node) {
        const parent = this.tagStack[this.tagStack.length - 1];
        const previousSibling = parent.children[parent.children.length - 1];
        if (this.options.withStartIndices) {
            node.startIndex = this.parser.startIndex;
        }
        if (this.options.withEndIndices) {
            node.endIndex = this.parser.endIndex;
        }
        parent.children.push(node);
        if (previousSibling) {
            node.prev = previousSibling;
            previousSibling.next = node;
        }
        node.parent = parent;
        this.lastNode = null;
    }
}

const xmlReplacer = /["&'<>$\x80-\uFFFF]/g;
const xmlCodeMap = new Map([
    [34, "&quot;"],
    [38, "&amp;"],
    [39, "&apos;"],
    [60, "&lt;"],
    [62, "&gt;"],
]);
// For compatibility with node < 4, we wrap `codePointAt`
const getCodePoint = 
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
String.prototype.codePointAt != null
    ? (str, index) => str.codePointAt(index)
    : // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
        (c, index) => (c.charCodeAt(index) & 0xfc00) === 0xd800
            ? (c.charCodeAt(index) - 0xd800) * 0x400 +
                c.charCodeAt(index + 1) -
                0xdc00 +
                0x10000
            : c.charCodeAt(index);
/**
 * Encodes all non-ASCII characters, as well as characters not valid in XML
 * documents using XML entities.
 *
 * If a character has no equivalent entity, a
 * numeric hexadecimal reference (eg. `&#xfc;`) will be used.
 */
function encodeXML(str) {
    let ret = "";
    let lastIdx = 0;
    let match;
    while ((match = xmlReplacer.exec(str)) !== null) {
        const i = match.index;
        const char = str.charCodeAt(i);
        const next = xmlCodeMap.get(char);
        if (next !== undefined) {
            ret += str.substring(lastIdx, i) + next;
            lastIdx = i + 1;
        }
        else {
            ret += `${str.substring(lastIdx, i)}&#x${getCodePoint(str, i).toString(16)};`;
            // Increase by 1 if we have a surrogate pair
            lastIdx = xmlReplacer.lastIndex += Number((char & 0xfc00) === 0xd800);
        }
    }
    return ret + str.substr(lastIdx);
}
/**
 * Creates a function that escapes all characters matched by the given regular
 * expression using the given map of characters to escape to their entities.
 *
 * @param regex Regular expression to match characters to escape.
 * @param map Map of characters to escape to their entities.
 *
 * @returns Function that escapes all characters matched by the given regular
 * expression using the given map of characters to escape to their entities.
 */
function getEscaper(regex, map) {
    return function escape(data) {
        let match;
        let lastIdx = 0;
        let result = "";
        while ((match = regex.exec(data))) {
            if (lastIdx !== match.index) {
                result += data.substring(lastIdx, match.index);
            }
            // We know that this character will be in the map.
            result += map.get(match[0].charCodeAt(0));
            // Every match will be of length 1
            lastIdx = match.index + 1;
        }
        return result + data.substring(lastIdx);
    };
}
/**
 * Encodes all characters that have to be escaped in HTML attributes,
 * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}.
 *
 * @param data String to escape.
 */
const escapeAttribute = getEscaper(/["&\u00A0]/g, new Map([
    [34, "&quot;"],
    [38, "&amp;"],
    [160, "&nbsp;"],
]));
/**
 * Encodes all characters that have to be escaped in HTML text,
 * following {@link https://html.spec.whatwg.org/multipage/parsing.html#escapingString}.
 *
 * @param data String to escape.
 */
const escapeText = getEscaper(/[&<>\u00A0]/g, new Map([
    [38, "&amp;"],
    [60, "&lt;"],
    [62, "&gt;"],
    [160, "&nbsp;"],
]));

const elementNames = new Map([
    "altGlyph",
    "altGlyphDef",
    "altGlyphItem",
    "animateColor",
    "animateMotion",
    "animateTransform",
    "clipPath",
    "feBlend",
    "feColorMatrix",
    "feComponentTransfer",
    "feComposite",
    "feConvolveMatrix",
    "feDiffuseLighting",
    "feDisplacementMap",
    "feDistantLight",
    "feDropShadow",
    "feFlood",
    "feFuncA",
    "feFuncB",
    "feFuncG",
    "feFuncR",
    "feGaussianBlur",
    "feImage",
    "feMerge",
    "feMergeNode",
    "feMorphology",
    "feOffset",
    "fePointLight",
    "feSpecularLighting",
    "feSpotLight",
    "feTile",
    "feTurbulence",
    "foreignObject",
    "glyphRef",
    "linearGradient",
    "radialGradient",
    "textPath",
].map((val) => [val.toLowerCase(), val]));
const attributeNames = new Map([
    "definitionURL",
    "attributeName",
    "attributeType",
    "baseFrequency",
    "baseProfile",
    "calcMode",
    "clipPathUnits",
    "diffuseConstant",
    "edgeMode",
    "filterUnits",
    "glyphRef",
    "gradientTransform",
    "gradientUnits",
    "kernelMatrix",
    "kernelUnitLength",
    "keyPoints",
    "keySplines",
    "keyTimes",
    "lengthAdjust",
    "limitingConeAngle",
    "markerHeight",
    "markerUnits",
    "markerWidth",
    "maskContentUnits",
    "maskUnits",
    "numOctaves",
    "pathLength",
    "patternContentUnits",
    "patternTransform",
    "patternUnits",
    "pointsAtX",
    "pointsAtY",
    "pointsAtZ",
    "preserveAlpha",
    "preserveAspectRatio",
    "primitiveUnits",
    "refX",
    "refY",
    "repeatCount",
    "repeatDur",
    "requiredExtensions",
    "requiredFeatures",
    "specularConstant",
    "specularExponent",
    "spreadMethod",
    "startOffset",
    "stdDeviation",
    "stitchTiles",
    "surfaceScale",
    "systemLanguage",
    "tableValues",
    "targetX",
    "targetY",
    "textLength",
    "viewBox",
    "viewTarget",
    "xChannelSelector",
    "yChannelSelector",
    "zoomAndPan",
].map((val) => [val.toLowerCase(), val]));

/*
 * Module dependencies
 */
const unencodedElements = new Set([
    "style",
    "script",
    "xmp",
    "iframe",
    "noembed",
    "noframes",
    "plaintext",
    "noscript",
]);
function replaceQuotes(value) {
    return value.replace(/"/g, "&quot;");
}
/**
 * Format attributes
 */
function formatAttributes(attributes, opts) {
    var _a;
    if (!attributes)
        return;
    const encode = ((_a = opts.encodeEntities) !== null && _a !== void 0 ? _a : opts.decodeEntities) === false
        ? replaceQuotes
        : opts.xmlMode || opts.encodeEntities !== "utf8"
            ? encodeXML
            : escapeAttribute;
    return Object.keys(attributes)
        .map((key) => {
        var _a, _b;
        const value = (_a = attributes[key]) !== null && _a !== void 0 ? _a : "";
        if (opts.xmlMode === "foreign") {
            /* Fix up mixed-case attribute names */
            key = (_b = attributeNames.get(key)) !== null && _b !== void 0 ? _b : key;
        }
        if (!opts.emptyAttrs && !opts.xmlMode && value === "") {
            return key;
        }
        return `${key}="${encode(value)}"`;
    })
        .join(" ");
}
/**
 * Self-enclosing tags
 */
const singleTag = new Set([
    "area",
    "base",
    "basefont",
    "br",
    "col",
    "command",
    "embed",
    "frame",
    "hr",
    "img",
    "input",
    "isindex",
    "keygen",
    "link",
    "meta",
    "param",
    "source",
    "track",
    "wbr",
]);
/**
 * Renders a DOM node or an array of DOM nodes to a string.
 *
 * Can be thought of as the equivalent of the `outerHTML` of the passed node(s).
 *
 * @param node Node to be rendered.
 * @param options Changes serialization behavior
 */
function render(node, options = {}) {
    const nodes = "length" in node ? node : [node];
    let output = "";
    for (let i = 0; i < nodes.length; i++) {
        output += renderNode(nodes[i], options);
    }
    return output;
}
function renderNode(node, options) {
    switch (node.type) {
        case Root:
            return render(node.children, options);
        // @ts-expect-error We don't use `Doctype` yet
        case Doctype:
        case Directive:
            return renderDirective(node);
        case Comment$3:
            return renderComment(node);
        case CDATA$1:
            return renderCdata(node);
        case Script:
        case Style:
        case Tag:
            return renderTag(node, options);
        case Text$3:
            return renderText(node, options);
    }
}
const foreignModeIntegrationPoints = new Set([
    "mi",
    "mo",
    "mn",
    "ms",
    "mtext",
    "annotation-xml",
    "foreignObject",
    "desc",
    "title",
]);
const foreignElements = new Set(["svg", "math"]);
function renderTag(elem, opts) {
    var _a;
    // Handle SVG / MathML in HTML
    if (opts.xmlMode === "foreign") {
        /* Fix up mixed-case element names */
        elem.name = (_a = elementNames.get(elem.name)) !== null && _a !== void 0 ? _a : elem.name;
        /* Exit foreign mode at integration points */
        if (elem.parent &&
            foreignModeIntegrationPoints.has(elem.parent.name)) {
            opts = { ...opts, xmlMode: false };
        }
    }
    if (!opts.xmlMode && foreignElements.has(elem.name)) {
        opts = { ...opts, xmlMode: "foreign" };
    }
    let tag = `<${elem.name}`;
    const attribs = formatAttributes(elem.attribs, opts);
    if (attribs) {
        tag += ` ${attribs}`;
    }
    if (elem.children.length === 0 &&
        (opts.xmlMode
            ? // In XML mode or foreign mode, and user hasn't explicitly turned off self-closing tags
                opts.selfClosingTags !== false
            : // User explicitly asked for self-closing tags, even in HTML mode
                opts.selfClosingTags && singleTag.has(elem.name))) {
        if (!opts.xmlMode)
            tag += " ";
        tag += "/>";
    }
    else {
        tag += ">";
        if (elem.children.length > 0) {
            tag += render(elem.children, opts);
        }
        if (opts.xmlMode || !singleTag.has(elem.name)) {
            tag += `</${elem.name}>`;
        }
    }
    return tag;
}
function renderDirective(elem) {
    return `<${elem.data}>`;
}
function renderText(elem, opts) {
    var _a;
    let data = elem.data || "";
    // If entities weren't decoded, no need to encode them back
    if (((_a = opts.encodeEntities) !== null && _a !== void 0 ? _a : opts.decodeEntities) !== false &&
        !(!opts.xmlMode &&
            elem.parent &&
            unencodedElements.has(elem.parent.name))) {
        data =
            opts.xmlMode || opts.encodeEntities !== "utf8"
                ? encodeXML(data)
                : escapeText(data);
    }
    return data;
}
function renderCdata(elem) {
    return `<![CDATA[${elem.children[0].data}]]>`;
}
function renderComment(elem) {
    return `<!--${elem.data}-->`;
}

/**
 * @category Stringify
 * @deprecated Use the `dom-serializer` module directly.
 * @param node Node to get the outer HTML of.
 * @param options Options for serialization.
 * @returns `node`'s outer HTML.
 */
function getOuterHTML(node, options) {
    return render(node, options);
}
/**
 * @category Stringify
 * @deprecated Use the `dom-serializer` module directly.
 * @param node Node to get the inner HTML of.
 * @param options Options for serialization.
 * @returns `node`'s inner HTML.
 */
function getInnerHTML(node, options) {
    return hasChildren(node)
        ? node.children.map((node) => getOuterHTML(node, options)).join("")
        : "";
}
/**
 * Get a node's inner text. Same as `textContent`, but inserts newlines for `<br>` tags. Ignores comments.
 *
 * @category Stringify
 * @deprecated Use `textContent` instead.
 * @param node Node to get the inner text of.
 * @returns `node`'s inner text.
 */
function getText$1(node) {
    if (Array.isArray(node))
        return node.map(getText$1).join("");
    if (isTag$1(node))
        return node.name === "br" ? "\n" : getText$1(node.children);
    if (isCDATA(node))
        return getText$1(node.children);
    if (isText(node))
        return node.data;
    return "";
}
/**
 * Get a node's text content. Ignores comments.
 *
 * @category Stringify
 * @param node Node to get the text content of.
 * @returns `node`'s text content.
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent}
 */
function textContent(node) {
    if (Array.isArray(node))
        return node.map(textContent).join("");
    if (hasChildren(node) && !isComment(node)) {
        return textContent(node.children);
    }
    if (isText(node))
        return node.data;
    return "";
}
/**
 * Get a node's inner text, ignoring `<script>` and `<style>` tags. Ignores comments.
 *
 * @category Stringify
 * @param node Node to get the inner text of.
 * @returns `node`'s inner text.
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Node/innerText}
 */
function innerText(node) {
    if (Array.isArray(node))
        return node.map(innerText).join("");
    if (hasChildren(node) && (node.type === ElementType.Tag || isCDATA(node))) {
        return innerText(node.children);
    }
    if (isText(node))
        return node.data;
    return "";
}

/**
 * Get a node's children.
 *
 * @category Traversal
 * @param elem Node to get the children of.
 * @returns `elem`'s children, or an empty array.
 */
function getChildren$1(elem) {
    return hasChildren(elem) ? elem.children : [];
}
/**
 * Get a node's parent.
 *
 * @category Traversal
 * @param elem Node to get the parent of.
 * @returns `elem`'s parent node, or `null` if `elem` is a root node.
 */
function getParent$1(elem) {
    return elem.parent || null;
}
/**
 * Gets an elements siblings, including the element itself.
 *
 * Attempts to get the children through the element's parent first. If we don't
 * have a parent (the element is a root node), we walk the element's `prev` &
 * `next` to get all remaining nodes.
 *
 * @category Traversal
 * @param elem Element to get the siblings of.
 * @returns `elem`'s siblings, including `elem`.
 */
function getSiblings$1(elem) {
    const parent = getParent$1(elem);
    if (parent != null)
        return getChildren$1(parent);
    const siblings = [elem];
    let { prev, next } = elem;
    while (prev != null) {
        siblings.unshift(prev);
        ({ prev } = prev);
    }
    while (next != null) {
        siblings.push(next);
        ({ next } = next);
    }
    return siblings;
}
/**
 * Gets an attribute from an element.
 *
 * @category Traversal
 * @param elem Element to check.
 * @param name Attribute name to retrieve.
 * @returns The element's attribute value, or `undefined`.
 */
function getAttributeValue$1(elem, name) {
    var _a;
    return (_a = elem.attribs) === null || _a === void 0 ? void 0 : _a[name];
}
/**
 * Checks whether an element has an attribute.
 *
 * @category Traversal
 * @param elem Element to check.
 * @param name Attribute name to look for.
 * @returns Returns whether `elem` has the attribute `name`.
 */
function hasAttrib$1(elem, name) {
    return (elem.attribs != null &&
        Object.prototype.hasOwnProperty.call(elem.attribs, name) &&
        elem.attribs[name] != null);
}
/**
 * Get the tag name of an element.
 *
 * @category Traversal
 * @param elem The element to get the name for.
 * @returns The tag name of `elem`.
 */
function getName$1(elem) {
    return elem.name;
}
/**
 * Returns the next element sibling of a node.
 *
 * @category Traversal
 * @param elem The element to get the next sibling of.
 * @returns `elem`'s next sibling that is a tag, or `null` if there is no next
 * sibling.
 */
function nextElementSibling$1(elem) {
    let { next } = elem;
    while (next !== null && !isTag$1(next))
        ({ next } = next);
    return next;
}
/**
 * Returns the previous element sibling of a node.
 *
 * @category Traversal
 * @param elem The element to get the previous sibling of.
 * @returns `elem`'s previous sibling that is a tag, or `null` if there is no
 * previous sibling.
 */
function prevElementSibling(elem) {
    let { prev } = elem;
    while (prev !== null && !isTag$1(prev))
        ({ prev } = prev);
    return prev;
}

/**
 * Remove an element from the dom
 *
 * @category Manipulation
 * @param elem The element to be removed
 */
function removeElement(elem) {
    if (elem.prev)
        elem.prev.next = elem.next;
    if (elem.next)
        elem.next.prev = elem.prev;
    if (elem.parent) {
        const childs = elem.parent.children;
        const childsIndex = childs.lastIndexOf(elem);
        if (childsIndex >= 0) {
            childs.splice(childsIndex, 1);
        }
    }
    elem.next = null;
    elem.prev = null;
    elem.parent = null;
}
/**
 * Replace an element in the dom
 *
 * @category Manipulation
 * @param elem The element to be replaced
 * @param replacement The element to be added
 */
function replaceElement(elem, replacement) {
    const prev = (replacement.prev = elem.prev);
    if (prev) {
        prev.next = replacement;
    }
    const next = (replacement.next = elem.next);
    if (next) {
        next.prev = replacement;
    }
    const parent = (replacement.parent = elem.parent);
    if (parent) {
        const childs = parent.children;
        childs[childs.lastIndexOf(elem)] = replacement;
        elem.parent = null;
    }
}
/**
 * Append a child to an element.
 *
 * @category Manipulation
 * @param parent The element to append to.
 * @param child The element to be added as a child.
 */
function appendChild(parent, child) {
    removeElement(child);
    child.next = null;
    child.parent = parent;
    if (parent.children.push(child) > 1) {
        const sibling = parent.children[parent.children.length - 2];
        sibling.next = child;
        child.prev = sibling;
    }
    else {
        child.prev = null;
    }
}
/**
 * Append an element after another.
 *
 * @category Manipulation
 * @param elem The element to append after.
 * @param next The element be added.
 */
function append$2(elem, next) {
    removeElement(next);
    const { parent } = elem;
    const currNext = elem.next;
    next.next = currNext;
    next.prev = elem;
    elem.next = next;
    next.parent = parent;
    if (currNext) {
        currNext.prev = next;
        if (parent) {
            const childs = parent.children;
            childs.splice(childs.lastIndexOf(currNext), 0, next);
        }
    }
    else if (parent) {
        parent.children.push(next);
    }
}
/**
 * Prepend a child to an element.
 *
 * @category Manipulation
 * @param parent The element to prepend before.
 * @param child The element to be added as a child.
 */
function prependChild(parent, child) {
    removeElement(child);
    child.parent = parent;
    child.prev = null;
    if (parent.children.unshift(child) !== 1) {
        const sibling = parent.children[1];
        sibling.prev = child;
        child.next = sibling;
    }
    else {
        child.next = null;
    }
}
/**
 * Prepend an element before another.
 *
 * @category Manipulation
 * @param elem The element to prepend before.
 * @param prev The element be added.
 */
function prepend(elem, prev) {
    removeElement(prev);
    const { parent } = elem;
    if (parent) {
        const childs = parent.children;
        childs.splice(childs.indexOf(elem), 0, prev);
    }
    if (elem.prev) {
        elem.prev.next = prev;
    }
    prev.parent = parent;
    prev.prev = elem.prev;
    prev.next = elem;
    elem.prev = prev;
}

/**
 * Search a node and its children for nodes passing a test function. If `node` is not an array, it will be wrapped in one.
 *
 * @category Querying
 * @param test Function to test nodes on.
 * @param node Node to search. Will be included in the result set if it matches.
 * @param recurse Also consider child nodes.
 * @param limit Maximum number of nodes to return.
 * @returns All nodes passing `test`.
 */
function filter(test, node, recurse = true, limit = Infinity) {
    return find(test, Array.isArray(node) ? node : [node], recurse, limit);
}
/**
 * Search an array of nodes and their children for nodes passing a test function.
 *
 * @category Querying
 * @param test Function to test nodes on.
 * @param nodes Array of nodes to search.
 * @param recurse Also consider child nodes.
 * @param limit Maximum number of nodes to return.
 * @returns All nodes passing `test`.
 */
function find(test, nodes, recurse, limit) {
    const result = [];
    /** Stack of the arrays we are looking at. */
    const nodeStack = [nodes];
    /** Stack of the indices within the arrays. */
    const indexStack = [0];
    for (;;) {
        // First, check if the current array has any more elements to look at.
        if (indexStack[0] >= nodeStack[0].length) {
            // If we have no more arrays to look at, we are done.
            if (indexStack.length === 1) {
                return result;
            }
            // Otherwise, remove the current array from the stack.
            nodeStack.shift();
            indexStack.shift();
            // Loop back to the start to continue with the next array.
            continue;
        }
        const elem = nodeStack[0][indexStack[0]++];
        if (test(elem)) {
            result.push(elem);
            if (--limit <= 0)
                return result;
        }
        if (recurse && hasChildren(elem) && elem.children.length > 0) {
            /*
             * Add the children to the stack. We are depth-first, so this is
             * the next array we look at.
             */
            indexStack.unshift(0);
            nodeStack.unshift(elem.children);
        }
    }
}
/**
 * Finds the first element inside of an array that matches a test function. This is an alias for `Array.prototype.find`.
 *
 * @category Querying
 * @param test Function to test nodes on.
 * @param nodes Array of nodes to search.
 * @returns The first node in the array that passes `test`.
 * @deprecated Use `Array.prototype.find` directly.
 */
function findOneChild(test, nodes) {
    return nodes.find(test);
}
/**
 * Finds one element in a tree that passes a test.
 *
 * @category Querying
 * @param test Function to test nodes on.
 * @param nodes Node or array of nodes to search.
 * @param recurse Also consider child nodes.
 * @returns The first node that passes `test`.
 */
function findOne$1(test, nodes, recurse = true) {
    let elem = null;
    for (let i = 0; i < nodes.length && !elem; i++) {
        const node = nodes[i];
        if (!isTag$1(node)) {
            continue;
        }
        else if (test(node)) {
            elem = node;
        }
        else if (recurse && node.children.length > 0) {
            elem = findOne$1(test, node.children, true);
        }
    }
    return elem;
}
/**
 * Checks if a tree of nodes contains at least one node passing a test.
 *
 * @category Querying
 * @param test Function to test nodes on.
 * @param nodes Array of nodes to search.
 * @returns Whether a tree of nodes contains at least one node passing the test.
 */
function existsOne$1(test, nodes) {
    return nodes.some((checked) => isTag$1(checked) &&
        (test(checked) || existsOne$1(test, checked.children)));
}
/**
 * Search an array of nodes and their children for elements passing a test function.
 *
 * Same as `find`, but limited to elements and with less options, leading to reduced complexity.
 *
 * @category Querying
 * @param test Function to test nodes on.
 * @param nodes Array of nodes to search.
 * @returns All nodes passing `test`.
 */
function findAll$1(test, nodes) {
    const result = [];
    const nodeStack = [nodes];
    const indexStack = [0];
    for (;;) {
        if (indexStack[0] >= nodeStack[0].length) {
            if (nodeStack.length === 1) {
                return result;
            }
            // Otherwise, remove the current array from the stack.
            nodeStack.shift();
            indexStack.shift();
            // Loop back to the start to continue with the next array.
            continue;
        }
        const elem = nodeStack[0][indexStack[0]++];
        if (!isTag$1(elem))
            continue;
        if (test(elem))
            result.push(elem);
        if (elem.children.length > 0) {
            indexStack.unshift(0);
            nodeStack.unshift(elem.children);
        }
    }
}

/**
 * A map of functions to check nodes against.
 */
const Checks = {
    tag_name(name) {
        if (typeof name === "function") {
            return (elem) => isTag$1(elem) && name(elem.name);
        }
        else if (name === "*") {
            return isTag$1;
        }
        return (elem) => isTag$1(elem) && elem.name === name;
    },
    tag_type(type) {
        if (typeof type === "function") {
            return (elem) => type(elem.type);
        }
        return (elem) => elem.type === type;
    },
    tag_contains(data) {
        if (typeof data === "function") {
            return (elem) => isText(elem) && data(elem.data);
        }
        return (elem) => isText(elem) && elem.data === data;
    },
};
/**
 * Returns a function to check whether a node has an attribute with a particular
 * value.
 *
 * @param attrib Attribute to check.
 * @param value Attribute value to look for.
 * @returns A function to check whether the a node has an attribute with a
 *   particular value.
 */
function getAttribCheck(attrib, value) {
    if (typeof value === "function") {
        return (elem) => isTag$1(elem) && value(elem.attribs[attrib]);
    }
    return (elem) => isTag$1(elem) && elem.attribs[attrib] === value;
}
/**
 * Returns a function that returns `true` if either of the input functions
 * returns `true` for a node.
 *
 * @param a First function to combine.
 * @param b Second function to combine.
 * @returns A function taking a node and returning `true` if either of the input
 *   functions returns `true` for the node.
 */
function combineFuncs(a, b) {
    return (elem) => a(elem) || b(elem);
}
/**
 * Returns a function that executes all checks in `options` and returns `true`
 * if any of them match a node.
 *
 * @param options An object describing nodes to look for.
 * @returns A function that executes all checks in `options` and returns `true`
 *   if any of them match a node.
 */
function compileTest(options) {
    const funcs = Object.keys(options).map((key) => {
        const value = options[key];
        return Object.prototype.hasOwnProperty.call(Checks, key)
            ? Checks[key](value)
            : getAttribCheck(key, value);
    });
    return funcs.length === 0 ? null : funcs.reduce(combineFuncs);
}
/**
 * Checks whether a node matches the description in `options`.
 *
 * @category Legacy Query Functions
 * @param options An object describing nodes to look for.
 * @param node The element to test.
 * @returns Whether the element matches the description in `options`.
 */
function testElement(options, node) {
    const test = compileTest(options);
    return test ? test(node) : true;
}
/**
 * Returns all nodes that match `options`.
 *
 * @category Legacy Query Functions
 * @param options An object describing nodes to look for.
 * @param nodes Nodes to search through.
 * @param recurse Also consider child nodes.
 * @param limit Maximum number of nodes to return.
 * @returns All nodes that match `options`.
 */
function getElements(options, nodes, recurse, limit = Infinity) {
    const test = compileTest(options);
    return test ? filter(test, nodes, recurse, limit) : [];
}
/**
 * Returns the node with the supplied ID.
 *
 * @category Legacy Query Functions
 * @param id The unique ID attribute value to look for.
 * @param nodes Nodes to search through.
 * @param recurse Also consider child nodes.
 * @returns The node with the supplied ID.
 */
function getElementById(id, nodes, recurse = true) {
    if (!Array.isArray(nodes))
        nodes = [nodes];
    return findOne$1(getAttribCheck("id", id), nodes, recurse);
}
/**
 * Returns all nodes with the supplied `tagName`.
 *
 * @category Legacy Query Functions
 * @param tagName Tag name to search for.
 * @param nodes Nodes to search through.
 * @param recurse Also consider child nodes.
 * @param limit Maximum number of nodes to return.
 * @returns All nodes with the supplied `tagName`.
 */
function getElementsByTagName(tagName, nodes, recurse = true, limit = Infinity) {
    return filter(Checks["tag_name"](tagName), nodes, recurse, limit);
}
/**
 * Returns all nodes with the supplied `type`.
 *
 * @category Legacy Query Functions
 * @param type Element type to look for.
 * @param nodes Nodes to search through.
 * @param recurse Also consider child nodes.
 * @param limit Maximum number of nodes to return.
 * @returns All nodes with the supplied `type`.
 */
function getElementsByTagType(type, nodes, recurse = true, limit = Infinity) {
    return filter(Checks["tag_type"](type), nodes, recurse, limit);
}

/**
 * Given an array of nodes, remove any member that is contained by another
 * member.
 *
 * @category Helpers
 * @param nodes Nodes to filter.
 * @returns Remaining nodes that aren't contained by other nodes.
 */
function removeSubsets$1(nodes) {
    let idx = nodes.length;
    /*
     * Check if each node (or one of its ancestors) is already contained in the
     * array.
     */
    while (--idx >= 0) {
        const node = nodes[idx];
        /*
         * Remove the node if it is not unique.
         * We are going through the array from the end, so we only
         * have to check nodes that preceed the node under consideration in the array.
         */
        if (idx > 0 && nodes.lastIndexOf(node, idx - 1) >= 0) {
            nodes.splice(idx, 1);
            continue;
        }
        for (let ancestor = node.parent; ancestor; ancestor = ancestor.parent) {
            if (nodes.includes(ancestor)) {
                nodes.splice(idx, 1);
                break;
            }
        }
    }
    return nodes;
}
/**
 * @category Helpers
 * @see {@link http://dom.spec.whatwg.org/#dom-node-comparedocumentposition}
 */
var DocumentPosition;
(function (DocumentPosition) {
    DocumentPosition[DocumentPosition["DISCONNECTED"] = 1] = "DISCONNECTED";
    DocumentPosition[DocumentPosition["PRECEDING"] = 2] = "PRECEDING";
    DocumentPosition[DocumentPosition["FOLLOWING"] = 4] = "FOLLOWING";
    DocumentPosition[DocumentPosition["CONTAINS"] = 8] = "CONTAINS";
    DocumentPosition[DocumentPosition["CONTAINED_BY"] = 16] = "CONTAINED_BY";
})(DocumentPosition || (DocumentPosition = {}));
/**
 * Compare the position of one node against another node in any other document,
 * returning a bitmask with the values from {@link DocumentPosition}.
 *
 * Document order:
 * > There is an ordering, document order, defined on all the nodes in the
 * > document corresponding to the order in which the first character of the
 * > XML representation of each node occurs in the XML representation of the
 * > document after expansion of general entities. Thus, the document element
 * > node will be the first node. Element nodes occur before their children.
 * > Thus, document order orders element nodes in order of the occurrence of
 * > their start-tag in the XML (after expansion of entities). The attribute
 * > nodes of an element occur after the element and before its children. The
 * > relative order of attribute nodes is implementation-dependent.
 *
 * Source:
 * http://www.w3.org/TR/DOM-Level-3-Core/glossary.html#dt-document-order
 *
 * @category Helpers
 * @param nodeA The first node to use in the comparison
 * @param nodeB The second node to use in the comparison
 * @returns A bitmask describing the input nodes' relative position.
 *
 * See http://dom.spec.whatwg.org/#dom-node-comparedocumentposition for
 * a description of these values.
 */
function compareDocumentPosition(nodeA, nodeB) {
    const aParents = [];
    const bParents = [];
    if (nodeA === nodeB) {
        return 0;
    }
    let current = hasChildren(nodeA) ? nodeA : nodeA.parent;
    while (current) {
        aParents.unshift(current);
        current = current.parent;
    }
    current = hasChildren(nodeB) ? nodeB : nodeB.parent;
    while (current) {
        bParents.unshift(current);
        current = current.parent;
    }
    const maxIdx = Math.min(aParents.length, bParents.length);
    let idx = 0;
    while (idx < maxIdx && aParents[idx] === bParents[idx]) {
        idx++;
    }
    if (idx === 0) {
        return DocumentPosition.DISCONNECTED;
    }
    const sharedParent = aParents[idx - 1];
    const siblings = sharedParent.children;
    const aSibling = aParents[idx];
    const bSibling = bParents[idx];
    if (siblings.indexOf(aSibling) > siblings.indexOf(bSibling)) {
        if (sharedParent === nodeB) {
            return DocumentPosition.FOLLOWING | DocumentPosition.CONTAINED_BY;
        }
        return DocumentPosition.FOLLOWING;
    }
    if (sharedParent === nodeA) {
        return DocumentPosition.PRECEDING | DocumentPosition.CONTAINS;
    }
    return DocumentPosition.PRECEDING;
}
/**
 * Sort an array of nodes based on their relative position in the document,
 * removing any duplicate nodes. If the array contains nodes that do not belong
 * to the same document, sort order is unspecified.
 *
 * @category Helpers
 * @param nodes Array of DOM nodes.
 * @returns Collection of unique nodes, sorted in document order.
 */
function uniqueSort(nodes) {
    nodes = nodes.filter((node, i, arr) => !arr.includes(node, i + 1));
    nodes.sort((a, b) => {
        const relative = compareDocumentPosition(a, b);
        if (relative & DocumentPosition.PRECEDING) {
            return -1;
        }
        else if (relative & DocumentPosition.FOLLOWING) {
            return 1;
        }
        return 0;
    });
    return nodes;
}

/**
 * Get the feed object from the root of a DOM tree.
 *
 * @category Feeds
 * @param doc - The DOM to to extract the feed from.
 * @returns The feed.
 */
function getFeed(doc) {
    const feedRoot = getOneElement(isValidFeed, doc);
    return !feedRoot
        ? null
        : feedRoot.name === "feed"
            ? getAtomFeed(feedRoot)
            : getRssFeed(feedRoot);
}
/**
 * Parse an Atom feed.
 *
 * @param feedRoot The root of the feed.
 * @returns The parsed feed.
 */
function getAtomFeed(feedRoot) {
    var _a;
    const childs = feedRoot.children;
    const feed = {
        type: "atom",
        items: getElementsByTagName("entry", childs).map((item) => {
            var _a;
            const { children } = item;
            const entry = { media: getMediaElements(children) };
            addConditionally(entry, "id", "id", children);
            addConditionally(entry, "title", "title", children);
            const href = (_a = getOneElement("link", children)) === null || _a === void 0 ? void 0 : _a.attribs["href"];
            if (href) {
                entry.link = href;
            }
            const description = fetch("summary", children) || fetch("content", children);
            if (description) {
                entry.description = description;
            }
            const pubDate = fetch("updated", children);
            if (pubDate) {
                entry.pubDate = new Date(pubDate);
            }
            return entry;
        }),
    };
    addConditionally(feed, "id", "id", childs);
    addConditionally(feed, "title", "title", childs);
    const href = (_a = getOneElement("link", childs)) === null || _a === void 0 ? void 0 : _a.attribs["href"];
    if (href) {
        feed.link = href;
    }
    addConditionally(feed, "description", "subtitle", childs);
    const updated = fetch("updated", childs);
    if (updated) {
        feed.updated = new Date(updated);
    }
    addConditionally(feed, "author", "email", childs, true);
    return feed;
}
/**
 * Parse a RSS feed.
 *
 * @param feedRoot The root of the feed.
 * @returns The parsed feed.
 */
function getRssFeed(feedRoot) {
    var _a, _b;
    const childs = (_b = (_a = getOneElement("channel", feedRoot.children)) === null || _a === void 0 ? void 0 : _a.children) !== null && _b !== void 0 ? _b : [];
    const feed = {
        type: feedRoot.name.substr(0, 3),
        id: "",
        items: getElementsByTagName("item", feedRoot.children).map((item) => {
            const { children } = item;
            const entry = { media: getMediaElements(children) };
            addConditionally(entry, "id", "guid", children);
            addConditionally(entry, "title", "title", children);
            addConditionally(entry, "link", "link", children);
            addConditionally(entry, "description", "description", children);
            const pubDate = fetch("pubDate", children) || fetch("dc:date", children);
            if (pubDate)
                entry.pubDate = new Date(pubDate);
            return entry;
        }),
    };
    addConditionally(feed, "title", "title", childs);
    addConditionally(feed, "link", "link", childs);
    addConditionally(feed, "description", "description", childs);
    const updated = fetch("lastBuildDate", childs);
    if (updated) {
        feed.updated = new Date(updated);
    }
    addConditionally(feed, "author", "managingEditor", childs, true);
    return feed;
}
const MEDIA_KEYS_STRING = ["url", "type", "lang"];
const MEDIA_KEYS_INT = [
    "fileSize",
    "bitrate",
    "framerate",
    "samplingrate",
    "channels",
    "duration",
    "height",
    "width",
];
/**
 * Get all media elements of a feed item.
 *
 * @param where Nodes to search in.
 * @returns Media elements.
 */
function getMediaElements(where) {
    return getElementsByTagName("media:content", where).map((elem) => {
        const { attribs } = elem;
        const media = {
            medium: attribs["medium"],
            isDefault: !!attribs["isDefault"],
        };
        for (const attrib of MEDIA_KEYS_STRING) {
            if (attribs[attrib]) {
                media[attrib] = attribs[attrib];
            }
        }
        for (const attrib of MEDIA_KEYS_INT) {
            if (attribs[attrib]) {
                media[attrib] = parseInt(attribs[attrib], 10);
            }
        }
        if (attribs["expression"]) {
            media.expression = attribs["expression"];
        }
        return media;
    });
}
/**
 * Get one element by tag name.
 *
 * @param tagName Tag name to look for
 * @param node Node to search in
 * @returns The element or null
 */
function getOneElement(tagName, node) {
    return getElementsByTagName(tagName, node, true, 1)[0];
}
/**
 * Get the text content of an element with a certain tag name.
 *
 * @param tagName Tag name to look for.
 * @param where Node to search in.
 * @param recurse Whether to recurse into child nodes.
 * @returns The text content of the element.
 */
function fetch(tagName, where, recurse = false) {
    return textContent(getElementsByTagName(tagName, where, recurse, 1)).trim();
}
/**
 * Adds a property to an object if it has a value.
 *
 * @param obj Object to be extended
 * @param prop Property name
 * @param tagName Tag name that contains the conditionally added property
 * @param where Element to search for the property
 * @param recurse Whether to recurse into child nodes.
 */
function addConditionally(obj, prop, tagName, where, recurse = false) {
    const val = fetch(tagName, where, recurse);
    if (val)
        obj[prop] = val;
}
/**
 * Checks if an element is a feed root node.
 *
 * @param value The name of the element to check.
 * @returns Whether an element is a feed root node.
 */
function isValidFeed(value) {
    return value === "rss" || value === "feed" || value === "rdf:RDF";
}

var DomUtils = /*#__PURE__*/Object.freeze({
    __proto__: null,
    get DocumentPosition () { return DocumentPosition; },
    append: append$2,
    appendChild: appendChild,
    compareDocumentPosition: compareDocumentPosition,
    existsOne: existsOne$1,
    filter: filter,
    find: find,
    findAll: findAll$1,
    findOne: findOne$1,
    findOneChild: findOneChild,
    getAttributeValue: getAttributeValue$1,
    getChildren: getChildren$1,
    getElementById: getElementById,
    getElements: getElements,
    getElementsByTagName: getElementsByTagName,
    getElementsByTagType: getElementsByTagType,
    getFeed: getFeed,
    getInnerHTML: getInnerHTML,
    getName: getName$1,
    getOuterHTML: getOuterHTML,
    getParent: getParent$1,
    getSiblings: getSiblings$1,
    getText: getText$1,
    hasAttrib: hasAttrib$1,
    hasChildren: hasChildren,
    innerText: innerText,
    isCDATA: isCDATA,
    isComment: isComment,
    isDocument: isDocument,
    isTag: isTag$1,
    isText: isText,
    nextElementSibling: nextElementSibling$1,
    prepend: prepend,
    prependChild: prependChild,
    prevElementSibling: prevElementSibling,
    removeElement: removeElement,
    removeSubsets: removeSubsets$1,
    replaceElement: replaceElement,
    testElement: testElement,
    textContent: textContent,
    uniqueSort: uniqueSort
});

// Helper methods
/**
 * Parses the data, returns the resulting document.
 *
 * @param data The data that should be parsed.
 * @param options Optional options for the parser and DOM handler.
 */
function parseDocument(data, options) {
    const handler = new DomHandler(undefined, options);
    new Parser$1(handler, options).end(data);
    return handler.root;
}
/**
 * Parses data, returns an array of the root nodes.
 *
 * Note that the root nodes still have a `Document` node as their parent.
 * Use `parseDocument` to get the `Document` node instead.
 *
 * @param data The data that should be parsed.
 * @param options Optional options for the parser and DOM handler.
 * @deprecated Use `parseDocument` instead.
 */
function parseDOM(data, options) {
    return parseDocument(data, options).children;
}
/**
 * Creates a parser instance, with an attached DOM handler.
 *
 * @param callback A callback that will be called once parsing has been completed, with the resulting document.
 * @param options Optional options for the parser and DOM handler.
 * @param elementCallback An optional callback that will be called every time a tag has been completed inside of the DOM.
 */
function createDocumentStream(callback, options, elementCallback) {
    const handler = new DomHandler((error) => callback(error, handler.root), options, elementCallback);
    return new Parser$1(handler, options);
}
/**
 * Creates a parser instance, with an attached DOM handler.
 *
 * @param callback A callback that will be called once parsing has been completed, with an array of root nodes.
 * @param options Optional options for the parser and DOM handler.
 * @param elementCallback An optional callback that will be called every time a tag has been completed inside of the DOM.
 * @deprecated Use `createDocumentStream` instead.
 */
function createDomStream(callback, options, elementCallback) {
    const handler = new DomHandler(callback, options, elementCallback);
    return new Parser$1(handler, options);
}
const parseFeedDefaultOptions = { xmlMode: true };
/**
 * Parse a feed.
 *
 * @param feed The feed that should be parsed, as a string.
 * @param options Optionally, options for parsing. When using this, you should set `xmlMode` to `true`.
 */
function parseFeed(feed, options = parseFeedDefaultOptions) {
    return getFeed(parseDOM(feed, options));
}

var HTMLParser2 = /*#__PURE__*/Object.freeze({
    __proto__: null,
    DefaultHandler: DomHandler,
    DomHandler: DomHandler,
    DomUtils: DomUtils,
    ElementType: index,
    Parser: Parser$1,
    get QuoteType () { return QuoteType; },
    Tokenizer: Tokenizer,
    createDocumentStream: createDocumentStream,
    createDomStream: createDomStream,
    getFeed: getFeed,
    parseDOM: parseDOM,
    parseDocument: parseDocument,
    parseFeed: parseFeed
});

// Internal
const NODE_END = -1;

// Node
const ELEMENT_NODE = 1;
const ATTRIBUTE_NODE = 2;
const TEXT_NODE = 3;
const CDATA_SECTION_NODE = 4;
const COMMENT_NODE = 8;
const DOCUMENT_NODE = 9;
const DOCUMENT_TYPE_NODE = 10;
const DOCUMENT_FRAGMENT_NODE = 11;

// Elements
const BLOCK_ELEMENTS = new Set(['ARTICLE', 'ASIDE', 'BLOCKQUOTE', 'BODY', 'BR', 'BUTTON', 'CANVAS', 'CAPTION', 'COL', 'COLGROUP', 'DD', 'DIV', 'DL', 'DT', 'EMBED', 'FIELDSET', 'FIGCAPTION', 'FIGURE', 'FOOTER', 'FORM', 'H1', 'H2', 'H3', 'H4', 'H5', 'H6', 'LI', 'UL', 'OL', 'P']);

// TreeWalker
const SHOW_ALL = -1;
const SHOW_ELEMENT = 1;
const SHOW_TEXT = 4;
const SHOW_CDATA_SECTION = 8;
const SHOW_COMMENT = 128;

// Document position
const DOCUMENT_POSITION_DISCONNECTED = 0x01;
const DOCUMENT_POSITION_PRECEDING = 0x02;
const DOCUMENT_POSITION_FOLLOWING = 0x04;
const DOCUMENT_POSITION_CONTAINS = 0x08;
const DOCUMENT_POSITION_CONTAINED_BY = 0x10;
const DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;

// SVG
const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';

const {
  assign,
  create: create$1,
  defineProperties,
  entries,
  getOwnPropertyDescriptors,
  keys,
  setPrototypeOf
} = Object;

const $String = String;

const getEnd = node => node.nodeType === ELEMENT_NODE ? node[END] : node;

const ignoreCase = ({ownerDocument}) => ownerDocument[MIME].ignoreCase;

const knownAdjacent = (prev, next) => {
  prev[NEXT] = next;
  next[PREV] = prev;
};

const knownBoundaries = (prev, current, next) => {
  knownAdjacent(prev, current);
  knownAdjacent(getEnd(current), next);
};

const knownSegment = (prev, start, end, next) => {
  knownAdjacent(prev, start);
  knownAdjacent(getEnd(end), next);
};

const knownSiblings = (prev, current, next) => {
  knownAdjacent(prev, current);
  knownAdjacent(current, next);
};

const localCase = ({localName, ownerDocument}) => {
  return ownerDocument[MIME].ignoreCase ? localName.toUpperCase() : localName;
};

const setAdjacent = (prev, next) => {
  if (prev)
    prev[NEXT] = next;
  if (next)
    next[PREV] = prev;
};

const shadowRoots = new WeakMap;

let reactive = false;

const Classes = new WeakMap;

const customElements = new WeakMap;

const attributeChangedCallback$1 = (element, attributeName, oldValue, newValue) => {
  if (
    reactive &&
    customElements.has(element) &&
    element.attributeChangedCallback &&
    element.constructor.observedAttributes.includes(attributeName)
  ) {
    element.attributeChangedCallback(attributeName, oldValue, newValue);
  }
};

const createTrigger = (method, isConnected) => element => {
  if (customElements.has(element)) {
    const info = customElements.get(element);
    if (info.connected !== isConnected && element.isConnected === isConnected) {
      info.connected = isConnected;
      if (method in element)
        element[method]();
    }
  }
};

const triggerConnected = createTrigger('connectedCallback', true);
const connectedCallback = element => {
  if (reactive) {
    triggerConnected(element);
    if (shadowRoots.has(element))
      element = shadowRoots.get(element).shadowRoot;
    let {[NEXT]: next, [END]: end} = element;
    while (next !== end) {
      if (next.nodeType === ELEMENT_NODE)
        triggerConnected(next);
      next = next[NEXT];
    }
  }
};

const triggerDisconnected = createTrigger('disconnectedCallback', false);
const disconnectedCallback = element => {
  if (reactive) {
    triggerDisconnected(element);
    if (shadowRoots.has(element))
      element = shadowRoots.get(element).shadowRoot;
    let {[NEXT]: next, [END]: end} = element;
    while (next !== end) {
      if (next.nodeType === ELEMENT_NODE)
        triggerDisconnected(next);
      next = next[NEXT];
    }
  }
};

/**
 * @implements globalThis.CustomElementRegistry
 */
class CustomElementRegistry {

  /**
   * @param {Document} ownerDocument
   */
  constructor(ownerDocument) {
    /**
     * @private
     */
    this.ownerDocument = ownerDocument;

    /**
     * @private
     */
    this.registry = new Map;

    /**
     * @private
     */
    this.waiting = new Map;

    /**
     * @private
     */
    this.active = false;
  }

  /**
   * @param {string} localName the custom element definition name
   * @param {Function} Class the custom element **Class** definition
   * @param {object?} options the optional object with an `extends` property
   */
  define(localName, Class, options = {}) {
    const {ownerDocument, registry, waiting} = this;

    if (registry.has(localName))
      throw new Error('unable to redefine ' + localName);

    if (Classes.has(Class))
      throw new Error('unable to redefine the same class: ' + Class);

    this.active = (reactive = true);

    const {extends: extend} = options;

    Classes.set(Class, {
      ownerDocument,
      options: {is: extend ? localName : ''},
      localName: extend || localName
    });

    const check = extend ?
      element => {
        return element.localName === extend &&
               element.getAttribute('is') === localName;
      } :
      element => element.localName === localName;
    registry.set(localName, {Class, check});
    if (waiting.has(localName)) {
      for (const resolve of waiting.get(localName))
        resolve(Class);
      waiting.delete(localName);
    }
    ownerDocument.querySelectorAll(
      extend ? `${extend}[is="${localName}"]` : localName
    ).forEach(this.upgrade, this);
  }

  /**
   * @param {Element} element
   */
  upgrade(element) {
    if (customElements.has(element))
      return;
    const {ownerDocument, registry} = this;
    const ce = element.getAttribute('is') || element.localName;
    if (registry.has(ce)) {
      const {Class, check} = registry.get(ce);
      if (check(element)) {
        const {attributes, isConnected} = element;
        for (const attr of attributes)
          element.removeAttributeNode(attr);

        const values = entries(element);
        for (const [key] of values)
          delete element[key];

        setPrototypeOf(element, Class.prototype);
        ownerDocument[UPGRADE] = {element, values};
        new Class(ownerDocument, ce);

        customElements.set(element, {connected: isConnected});

        for (const attr of attributes)
          element.setAttributeNode(attr);

        if (isConnected && element.connectedCallback)
          element.connectedCallback();
      }
    }
  }

  /**
   * @param {string} localName the custom element definition name
   */
  whenDefined(localName) {
    const {registry, waiting} = this;
    return new Promise(resolve => {
      if (registry.has(localName))
        resolve(registry.get(localName).Class);
      else {
        if (!waiting.has(localName))
          waiting.set(localName, []);
        waiting.get(localName).push(resolve);
      }
    });
  }

  /**
   * @param {string} localName the custom element definition name
   * @returns {Function?} the custom element **Class**, if any
   */
  get(localName) {
    const info = this.registry.get(localName);
    return info && info.Class;
  }

  /**
   * @param {Function} Class **Class** of custom element
   * @returns {string?} found tag name or null
   */
  getName(Class) {
    if (Classes.has(Class)) {
      const { localName } = Classes.get(Class);
      return localName;
    }
    return null;
  }
}

const {Parser} = HTMLParser2;

const append$1 = (self, node, active) => {
  const end = self[END];
  node.parentNode = self;
  knownBoundaries(end[PREV], node, end);
  if (active && node.nodeType === ELEMENT_NODE)
    connectedCallback(node);
  return node;
};

const attribute = (element, end, attribute, value, active) => {
  attribute[VALUE] = value;
  attribute.ownerElement = element;
  knownSiblings(end[PREV], attribute, end);
  if (attribute.name === 'class')
    element.className = value;
  if (active)
    attributeChangedCallback$1(element, attribute.name, null, value);
};

const parseFromString = (document, isHTML, markupLanguage) => {
  const {active, registry} = document[CUSTOM_ELEMENTS];

  let node = document;
  let ownerSVGElement = null;
  let parsingCData = false;

  const content = new Parser({
    // <!DOCTYPE ...>
    onprocessinginstruction(name, data) {
      if (name.toLowerCase() === '!doctype')
        document.doctype = data.slice(name.length).trim();
    },

    // <tagName>
    onopentag(name, attributes) {
      let create = true;
      if (isHTML) {
        if (ownerSVGElement) {
          node = append$1(node, document.createElementNS(SVG_NAMESPACE, name), active);
          node.ownerSVGElement = ownerSVGElement;
          create = false;
        }
        else if (name === 'svg' || name === 'SVG') {
          ownerSVGElement = document.createElementNS(SVG_NAMESPACE, name);
          node = append$1(node, ownerSVGElement, active);
          create = false;
        }
        else if (active) {
          const ce = name.includes('-') ? name : (attributes.is || '');
          if (ce && registry.has(ce)) {
            const {Class} = registry.get(ce);
            node = append$1(node, new Class, active);
            delete attributes.is;
            create = false;
          }
        }
      }

      if (create)
        node = append$1(node, document.createElement(name), false);

      let end = node[END];
      for (const name of keys(attributes))
        attribute(node, end, document.createAttribute(name), attributes[name], active);
    },

    // #text, #comment
    oncomment(data) { append$1(node, document.createComment(data), active); },
    ontext(text) {
      if (parsingCData) {
        append$1(node, document.createCDATASection(text), active);
      } else {
        append$1(node, document.createTextNode(text), active);
      }
    },

    // #cdata
    oncdatastart() { parsingCData = true; },
    oncdataend() { parsingCData = false; },

    // </tagName>
    onclosetag() {
      if (isHTML && node === ownerSVGElement)
        ownerSVGElement = null;
      node = node.parentNode;
    }
  }, {
    lowerCaseAttributeNames: false,
    decodeEntities: true,
    xmlMode: !isHTML
  });

  content.write(markupLanguage);
  content.end();

  return document;
};

const htmlClasses = new Map;

const registerHTMLClass = (names, Class) => {
  for (const name of [].concat(names)) {
    htmlClasses.set(name, Class);
    htmlClasses.set(name.toUpperCase(), Class);
  }
};

const performance = globalThis.performance;

const loopSegment = ({[NEXT]: next, [END]: end}, json) => {
  while (next !== end) {
    switch (next.nodeType) {
      case ATTRIBUTE_NODE:
        attrAsJSON(next, json);
        break;
      case TEXT_NODE:
      case COMMENT_NODE:
      case CDATA_SECTION_NODE:
        characterDataAsJSON(next, json);
        break;
      case ELEMENT_NODE:
        elementAsJSON(next, json);
        next = getEnd(next);
        break;
      case DOCUMENT_TYPE_NODE:
        documentTypeAsJSON(next, json);
        break;
    }
    next = next[NEXT];
  }
  const last = json.length - 1;
  const value = json[last];
  if (typeof value === 'number' && value < 0)
    json[last] += NODE_END;
  else
    json.push(NODE_END);
};

const attrAsJSON = (attr, json) => {
  json.push(ATTRIBUTE_NODE, attr.name);
  const value = attr[VALUE].trim();
  if (value)
    json.push(value);
};

const characterDataAsJSON = (node, json) => {
  const value = node[VALUE];
  if (value.trim())
    json.push(node.nodeType, value);
};

const nonElementAsJSON = (node, json) => {
  json.push(node.nodeType);
  loopSegment(node, json);
};

const documentTypeAsJSON = ({name, publicId, systemId}, json) => {
  json.push(DOCUMENT_TYPE_NODE, name);
  if (publicId)
    json.push(publicId);
  if (systemId)
    json.push(systemId);
};

const elementAsJSON = (element, json) => {
  json.push(ELEMENT_NODE, element.localName);
  loopSegment(element, json);
};

const createRecord =
  (type, target, addedNodes, removedNodes, attributeName, oldValue) =>
 ({type, target, addedNodes, removedNodes, attributeName, oldValue});

const queueAttribute = (
  observer, target, attributeName, attributeFilter, attributeOldValue, oldValue
) => {
  if ((!attributeFilter || attributeFilter.includes(attributeName))) {
    const {callback, records, scheduled} = observer;
    records.push(createRecord(
      'attributes', target,
      [], [],
      attributeName, attributeOldValue ? oldValue : void 0
    ));
    if (!scheduled) {
      observer.scheduled = true;
      Promise.resolve().then(() => {
        observer.scheduled = false;
        callback(records.splice(0), observer);
      });
    }
  }
};

const attributeChangedCallback = (element, attributeName, oldValue) => {
  const {ownerDocument} = element;
  const {active, observers} = ownerDocument[MUTATION_OBSERVER];
  if (active) {
    for (const observer of observers) {
      for (const [
        target,
        {
          childList,
          subtree,
          attributes,
          attributeFilter,
          attributeOldValue
        }
      ] of observer.nodes) {
        if (childList) {
          if (
            (subtree && (target === ownerDocument || target.contains(element))) ||
            (!subtree && target.children.includes(element))
          ) {
            queueAttribute(
              observer, element,
              attributeName, attributeFilter, attributeOldValue, oldValue
            );
            break;
          }
        }
        else if (
          attributes &&
          target === element
        ) {
          queueAttribute(
            observer, element,
            attributeName, attributeFilter, attributeOldValue, oldValue
          );
          break;
        }
      }
    }
  }
};

const moCallback = (element, parentNode) => {
  const {ownerDocument} = element;
  const {active, observers} = ownerDocument[MUTATION_OBSERVER];
  if (active) {
    for (const observer of observers) {
      for (const [target, {subtree, childList, characterData}] of observer.nodes) {
        if (childList) {
          if (
            (parentNode && (target === parentNode || /* c8 ignore next */(subtree && target.contains(parentNode)))) ||
            (!parentNode && ((subtree && (target === ownerDocument || /* c8 ignore next */target.contains(element))) ||
                            (!subtree && target[characterData ? 'childNodes' : 'children'].includes(element))))
          ) {
            const {callback, records, scheduled} = observer;
            records.push(createRecord(
              'childList', target,
              parentNode ? [] : [element], parentNode ? [element] : []
            ));
            if (!scheduled) {
              observer.scheduled = true;
              Promise.resolve().then(() => {
                observer.scheduled = false;
                callback(records.splice(0), observer);
              });
            }
            break;
          }
        }
      }
    }
  }
};

class MutationObserverClass {
  constructor(ownerDocument) {
    const observers = new Set;
    this.observers = observers;
    this.active = false;

    /**
     * @implements globalThis.MutationObserver
     */
    this.class = class MutationObserver {

      constructor(callback) {
        /**
         * @private
         */
        this.callback = callback;

        /**
         * @private
         */
        this.nodes = new Map;

        /**
         * @private
         */
        this.records = [];

        /**
         * @private
         */
        this.scheduled = false;
      }

      disconnect() {
        this.records.splice(0);
        this.nodes.clear();
        observers.delete(this);
        ownerDocument[MUTATION_OBSERVER].active = !!observers.size;
      }

      /**
       * @param {Element} target
       * @param {MutationObserverInit} options
       */
      observe(target, options = {
        subtree: false,
        childList: false,
        attributes: false,
        attributeFilter: null,
        attributeOldValue: false,
        characterData: false,
        // TODO: not implemented yet
        // characterDataOldValue: false
      }) {
        if (('attributeOldValue' in options) || ('attributeFilter' in options))
          options.attributes = true;
        // if ('characterDataOldValue' in options)
        //   options.characterData = true;
        options.childList = !!options.childList;
        options.subtree = !!options.subtree;
        this.nodes.set(target, options);
        observers.add(this);
        ownerDocument[MUTATION_OBSERVER].active = true;
      }

      /**
       * @returns {MutationRecord[]}
       */
      takeRecords() { return this.records.splice(0); }
    };
  }
}

const emptyAttributes = new Set([
  'allowfullscreen',
  'allowpaymentrequest',
  'async',
  'autofocus',
  'autoplay',
  'checked',
  'class',
  'contenteditable',
  'controls',
  'default',
  'defer',
  'disabled',
  'draggable',
  'formnovalidate',
  'hidden',
  'id',
  'ismap',
  'itemscope',
  'loop',
  'multiple',
  'muted',
  'nomodule',
  'novalidate',
  'open',
  'playsinline',
  'readonly',
  'required',
  'reversed',
  'selected',
  'style',
  'truespeed'
]);

const setAttribute = (element, attribute) => {
  const {[VALUE]: value, name} = attribute;
  attribute.ownerElement = element;
  knownSiblings(element, attribute, element[NEXT]);
  if (name === 'class')
    element.className = value;
  attributeChangedCallback(element, name, null);
  attributeChangedCallback$1(element, name, null, value);
};

const removeAttribute = (element, attribute) => {
  const {[VALUE]: value, name} = attribute;
  knownAdjacent(attribute[PREV], attribute[NEXT]);
  attribute.ownerElement = attribute[PREV] = attribute[NEXT] = null;
  if (name === 'class')
    element[CLASS_LIST] = null;
  attributeChangedCallback(element, name, value);
  attributeChangedCallback$1(element, name, value, null);
};

const booleanAttribute = {
  get(element, name) {
    return element.hasAttribute(name);
  },
  set(element, name, value) {
    if (value)
      element.setAttribute(name, '');
    else
      element.removeAttribute(name);
  }
};

const numericAttribute = {
  get(element, name) {
    return parseFloat(element.getAttribute(name) || 0);
  },
  set(element, name, value) {
    element.setAttribute(name, value);
  }
};

const stringAttribute = {
  get(element, name) {
    return element.getAttribute(name) || '';
  },
  set(element, name, value) {
    element.setAttribute(name, value);
  }
};

/* oddly enough, this apparently is not a thing
export const nullableAttribute = {
  get(element, name) {
    return element.getAttribute(name);
  },
  set(element, name, value) {
    if (value === null)
      element.removeAttribute(name);
    else
      element.setAttribute(name, value);
  }
};
*/

// https://dom.spec.whatwg.org/#interface-eventtarget

const wm = new WeakMap();

function dispatch(event, listener) {
  if (typeof listener === 'function')
    listener.call(event.target, event);
  else
    listener.handleEvent(event);
  return event._stopImmediatePropagationFlag;
}

function invokeListeners({currentTarget, target}) {
  const map = wm.get(currentTarget);
  if (map && map.has(this.type)) {
    const listeners = map.get(this.type);
    if (currentTarget === target) {
      this.eventPhase = this.AT_TARGET;
    } else {
      this.eventPhase = this.BUBBLING_PHASE;
    }

    this.currentTarget = currentTarget;
    this.target = target;
    for (const [listener, options] of listeners) {
      if (options && options.once)
        listeners.delete(listener);
      if (dispatch(this, listener))
        break;
    }
    delete this.currentTarget;
    delete this.target;
    return this.cancelBubble;
  }
}


/**
 * @implements globalThis.EventTarget
 */
class DOMEventTarget {

  constructor() {
    wm.set(this, new Map);
  }

  /**
   * @protected
   */
  _getParent() {
    return null;
  }

  addEventListener(type, listener, options) {
    const map = wm.get(this);
    if (!map.has(type)) 
      map.set(type, new Map);
    map.get(type).set(listener, options);
  }

  removeEventListener(type, listener) {
    const map = wm.get(this);
    if (map.has(type)) {
      const listeners = map.get(type);
      if (listeners.delete(listener) && !listeners.size)
        map.delete(type);
    }
  }

  dispatchEvent(event) {
    let node = this;
    event.eventPhase = event.CAPTURING_PHASE;

    // intentionally simplified, specs imply way more code: https://dom.spec.whatwg.org/#event-path
    while (node) {
      if (node.dispatchEvent)
        event._path.push({currentTarget: node, target: this});
      node = event.bubbles && node._getParent && node._getParent();
    }
    event._path.some(invokeListeners, event);
    event._path = [];
    event.eventPhase = event.NONE;
    return !event.defaultPrevented;
  }

}

// https://dom.spec.whatwg.org/#interface-nodelist

/**
 * @implements globalThis.NodeList
 */
class NodeList extends Array {
  item(i) { return i < this.length ? this[i] : null; }
}

// https://dom.spec.whatwg.org/#node


const getParentNodeCount = ({parentNode}) => {
  let count = 0;
  while (parentNode) {
    count++;
    parentNode = parentNode.parentNode;
  }
  return count;
};

/**
 * @implements globalThis.Node
 */
let Node$1 = class Node extends DOMEventTarget {

  static get ELEMENT_NODE() { return ELEMENT_NODE; }
  static get ATTRIBUTE_NODE() { return ATTRIBUTE_NODE; }
  static get TEXT_NODE() { return TEXT_NODE; }
  static get CDATA_SECTION_NODE() { return CDATA_SECTION_NODE; }
  static get COMMENT_NODE() { return COMMENT_NODE; }
  static get DOCUMENT_NODE() { return DOCUMENT_NODE; }
  static get DOCUMENT_FRAGMENT_NODE() { return DOCUMENT_FRAGMENT_NODE; }
  static get DOCUMENT_TYPE_NODE() { return DOCUMENT_TYPE_NODE; }

  constructor(ownerDocument, localName, nodeType) {
    super();
    this.ownerDocument = ownerDocument;
    this.localName = localName;
    this.nodeType = nodeType;
    this.parentNode = null;
    this[NEXT] = null;
    this[PREV] = null;
  }

  get ELEMENT_NODE() { return ELEMENT_NODE; }
  get ATTRIBUTE_NODE() { return ATTRIBUTE_NODE; }
  get TEXT_NODE() { return TEXT_NODE; }
  get CDATA_SECTION_NODE() { return CDATA_SECTION_NODE; }
  get COMMENT_NODE() { return COMMENT_NODE; }
  get DOCUMENT_NODE() { return DOCUMENT_NODE; }
  get DOCUMENT_FRAGMENT_NODE() { return DOCUMENT_FRAGMENT_NODE; }
  get DOCUMENT_TYPE_NODE() { return DOCUMENT_TYPE_NODE; }

  get baseURI() {
    const ownerDocument = this.nodeType === DOCUMENT_NODE ?
                            this : this.ownerDocument;
    if (ownerDocument) {
      const base = ownerDocument.querySelector('base');
      if (base)
        return base.getAttribute('href');

      const {location} = ownerDocument.defaultView;
      if (location)
        return location.href;
    }

    return null;
  }

  /* c8 ignore start */
  // mixin: node
  get isConnected() { return false; }
  get nodeName() { return this.localName; }
  get parentElement() { return null; }
  get previousSibling() { return null; }
  get previousElementSibling() { return null; }
  get nextSibling() { return null; }
  get nextElementSibling() { return null; }
  get childNodes() { return new NodeList; }
  get firstChild() { return null; }
  get lastChild() { return null; }

  // default values
  get nodeValue() { return null; }
  set nodeValue(value) {}
  get textContent() { return null; }
  set textContent(value) {}
  normalize() {}
  cloneNode() { return null; }
  contains() { return false; }
  /**
   * Inserts a node before a reference node as a child of this parent node.
   * @param {Node} newNode The node to be inserted.
   * @param {Node} referenceNode The node before which newNode is inserted. If this is null, then newNode is inserted at the end of node's child nodes.
   * @returns The added child
   */
  // eslint-disable-next-line no-unused-vars
  insertBefore(newNode, referenceNode) { return newNode }
  /**
   * Adds a node to the end of the list of children of this node.
   * @param {Node} child The node to append to the given parent node.
   * @returns The appended child.
   */
  appendChild(child) { return child }
  /**
   * Replaces a child node within this node
   * @param {Node} newChild The new node to replace oldChild.
   * @param {Node} oldChild The child to be replaced.
   * @returns The replaced Node. This is the same node as oldChild.
   */
  replaceChild(newChild, oldChild) { return oldChild }
  /**
   * Removes a child node from the DOM.
   * @param {Node} child A Node that is the child node to be removed from the DOM.
   * @returns The removed node.
   */
  removeChild(child) { return child }
  toString() { return ''; }
  /* c8 ignore stop */

  hasChildNodes() { return !!this.lastChild; }
  isSameNode(node) { return this === node; }

  // TODO: attributes?
  compareDocumentPosition(target) {
    let result = 0;
    if (this !== target) {
      let self = getParentNodeCount(this);
      let other = getParentNodeCount(target);
      if (self < other) {
        result += DOCUMENT_POSITION_FOLLOWING;
        if (this.contains(target))
          result += DOCUMENT_POSITION_CONTAINED_BY;
      }
      else if (other < self) {
        result += DOCUMENT_POSITION_PRECEDING;
        if (target.contains(this))
          result += DOCUMENT_POSITION_CONTAINS;
      }
      else if (self && other) {
        const {childNodes} = this.parentNode;
        if (childNodes.indexOf(this) < childNodes.indexOf(target))
          result += DOCUMENT_POSITION_FOLLOWING;
        else
          result += DOCUMENT_POSITION_PRECEDING;
      }
      if (!self || !other) {
        result += DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC;
        result += DOCUMENT_POSITION_DISCONNECTED;
      }
    }
    return result;
  }

  isEqualNode(node) {
    if (this === node)
      return true;
    if (this.nodeType === node.nodeType) {
      switch (this.nodeType) {
        case DOCUMENT_NODE:
        case DOCUMENT_FRAGMENT_NODE: {
          const aNodes = this.childNodes;
          const bNodes = node.childNodes;
          return aNodes.length === bNodes.length && aNodes.every((node, i) => node.isEqualNode(bNodes[i]));
        }
      }
      return this.toString() === node.toString();
    }
    return false;
  }

  /**
   * @protected
   */
  _getParent() {
    return this.parentNode;
  }

  /**
   * Calling it on an element inside a standard web page will return an HTMLDocument object representing the entire page (or <iframe>).
   * Calling it on an element inside a shadow DOM will return the associated ShadowRoot.
   * @return {ShadowRoot | HTMLDocument}
   */
  getRootNode() {
    let root = this;
    while (root.parentNode)
      root = root.parentNode;
    return root;
  }
};

const {replace} = '';

// escape
const ca = /[<>&\xA0]/g;

const esca = {
  '\xA0': '&#160;',
  '&': '&amp;',
  '<': '&lt;',
  '>': '&gt;'
};

const pe = m => esca[m];

/**
 * Safely escape HTML entities such as `&`, `<`, `>` only.
 * @param {string} es the input to safely escape
 * @returns {string} the escaped input, and it **throws** an error if
 *  the input type is unexpected, except for boolean and numbers,
 *  converted as string.
 */
const escape = es => replace.call(es, ca, pe);

const QUOTE = /"/g;

/**
 * @implements globalThis.Attr
 */
let Attr$1 = class Attr extends Node$1 {
  constructor(ownerDocument, name, value = '') {
    super(ownerDocument, name, ATTRIBUTE_NODE);
    this.ownerElement = null;
    this.name = $String(name);
    this[VALUE] = $String(value);
    this[CHANGED] = false;
  }

  get value() { return this[VALUE]; }
  set value(newValue) {
    const {[VALUE]: oldValue, name, ownerElement} = this;
    this[VALUE] = $String(newValue);
    this[CHANGED] = true;
    if (ownerElement) {
      attributeChangedCallback(ownerElement, name, oldValue);
      attributeChangedCallback$1(ownerElement, name, oldValue, this[VALUE]);
    }
  }

  cloneNode() {
    const {ownerDocument, name, [VALUE]: value} = this;
    return new Attr(ownerDocument, name, value);
  }

  toString() {
    const {name, [VALUE]: value} = this;
    if (emptyAttributes.has(name) && !value) {
      return ignoreCase(this) ? name : `${name}=""`;
    }
    const escapedValue = (ignoreCase(this) ? value : escape(value)).replace(QUOTE, '&quot;');
    return `${name}="${escapedValue}"`;
  }

  toJSON() {
    const json = [];
    attrAsJSON(this, json);
    return json;
  }
};

const isConnected = ({ownerDocument, parentNode}) => {
  while (parentNode) {
    if (parentNode === ownerDocument)
      return true;
    parentNode = parentNode.parentNode || parentNode.host;
  }
  return false;
};

const parentElement = ({parentNode}) => {
  if (parentNode) {
    switch (parentNode.nodeType) {
      case DOCUMENT_NODE:
      case DOCUMENT_FRAGMENT_NODE:
        return null;
    }
  }
  return parentNode;
};

const previousSibling = ({[PREV]: prev}) => {
  switch (prev ? prev.nodeType : 0) {
    case NODE_END:
      return prev[START];
    case TEXT_NODE:
    case COMMENT_NODE:
    case CDATA_SECTION_NODE:
      return prev;
  }
  return null;
};

const nextSibling = node => {
  const next = getEnd(node)[NEXT];
  return next && (next.nodeType === NODE_END ? null : next);
};

// https://dom.spec.whatwg.org/#nondocumenttypechildnode
// CharacterData, Element


const nextElementSibling = node => {
  let next = nextSibling(node);
  while (next && next.nodeType !== ELEMENT_NODE)
    next = nextSibling(next);
  return next;
};

const previousElementSibling = node => {
  let prev = previousSibling(node);
  while (prev && prev.nodeType !== ELEMENT_NODE)
    prev = previousSibling(prev);
  return prev;
};

// https://dom.spec.whatwg.org/#childnode
// CharacterData, DocumentType, Element


const asFragment = (ownerDocument, nodes) => {
  const fragment = ownerDocument.createDocumentFragment();
  fragment.append(...nodes);
  return fragment;
};

const before = (node, nodes) => {
  const {ownerDocument, parentNode} = node;
  if (parentNode)
    parentNode.insertBefore(
      asFragment(ownerDocument, nodes),
      node
    );
};

const after = (node, nodes) => {
  const {ownerDocument, parentNode} = node;
  if (parentNode)
    parentNode.insertBefore(
      asFragment(ownerDocument, nodes),
      getEnd(node)[NEXT]
    );
};

const replaceWith = (node, nodes) => {
  const {ownerDocument, parentNode} = node;
  if (parentNode) {
    if (nodes.includes(node))
      replaceWith(node, [node = node.cloneNode()]);
    parentNode.insertBefore(
      asFragment(ownerDocument, nodes),
      node
    );
    node.remove();
  }
};

const remove = (prev, current, next) => {
  const {parentNode, nodeType} = current;
  if (prev || next) {
    setAdjacent(prev, next);
    current[PREV] = null;
    getEnd(current)[NEXT] = null;
  }
  if (parentNode) {
    current.parentNode = null;
    moCallback(current, parentNode);
    if (nodeType === ELEMENT_NODE)
      disconnectedCallback(current);
  }
};

// https://dom.spec.whatwg.org/#interface-characterdata


/**
 * @implements globalThis.CharacterData
 */
let CharacterData$1 = class CharacterData extends Node$1 {

  constructor(ownerDocument, localName, nodeType, data) {
    super(ownerDocument, localName, nodeType);
    this[VALUE] = $String(data);
  }

  // <Mixins>
  get isConnected() { return isConnected(this); }
  get parentElement() { return parentElement(this); }
  get previousSibling() { return previousSibling(this); }
  get nextSibling() { return nextSibling(this); }

  get previousElementSibling() { return previousElementSibling(this); }
  get nextElementSibling() { return nextElementSibling(this); }

  before(...nodes) { before(this, nodes); }
  after(...nodes) { after(this, nodes); }
  replaceWith(...nodes) { replaceWith(this, nodes); }
  remove() { remove(this[PREV], this, this[NEXT]); }
  // </Mixins>

  // CharacterData only
  /* c8 ignore start */
  get data() { return this[VALUE]; }
  set data(value) {
    this[VALUE] = $String(value);
    moCallback(this, this.parentNode);
  }

  get nodeValue() { return this.data; }
  set nodeValue(value) { this.data = value; }

  get textContent() { return this.data; }
  set textContent(value) { this.data = value; }

  get length() { return this.data.length; }

  substringData(offset, count) {
    return this.data.substr(offset, count);
  }

  appendData(data) {
    this.data += data;
  }

  insertData(offset, data) {
    const {data: t} = this;
    this.data = t.slice(0, offset) + data + t.slice(offset);
  }

  deleteData(offset, count) {
    const {data: t} = this;
    this.data = t.slice(0, offset) + t.slice(offset + count);
  }

  replaceData(offset, count, data) {
    const {data: t} = this;
    this.data = t.slice(0, offset) + data + t.slice(offset + count);
  }
  /* c8 ignore stop */

  toJSON() {
    const json = [];
    characterDataAsJSON(this, json);
    return json;
  }
};

/**
 * @implements globalThis.CDATASection
 */
let CDATASection$1 = class CDATASection extends CharacterData$1 {
  constructor(ownerDocument, data = '') {
    super(ownerDocument, '#cdatasection', CDATA_SECTION_NODE, data);
  }

  cloneNode() {
    const {ownerDocument, [VALUE]: data} = this;
    return new CDATASection(ownerDocument, data);
  }

  toString() { return `<![CDATA[${this[VALUE]}]]>`; }
};

/**
 * @implements globalThis.Comment
 */
let Comment$1 = class Comment extends CharacterData$1 {
  constructor(ownerDocument, data = '') {
    super(ownerDocument, '#comment', COMMENT_NODE, data);
  }

  cloneNode() {
    const {ownerDocument, [VALUE]: data} = this;
    return new Comment(ownerDocument, data);
  }

  toString() { return `<!--${this[VALUE]}-->`; }
};

function getDefaultExportFromCjs (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

var boolbase = {
	trueFunc: function trueFunc(){
		return true;
	},
	falseFunc: function falseFunc(){
		return false;
	}
};

var boolbase$1 = /*@__PURE__*/getDefaultExportFromCjs(boolbase);

var SelectorType;
(function (SelectorType) {
    SelectorType["Attribute"] = "attribute";
    SelectorType["Pseudo"] = "pseudo";
    SelectorType["PseudoElement"] = "pseudo-element";
    SelectorType["Tag"] = "tag";
    SelectorType["Universal"] = "universal";
    // Traversals
    SelectorType["Adjacent"] = "adjacent";
    SelectorType["Child"] = "child";
    SelectorType["Descendant"] = "descendant";
    SelectorType["Parent"] = "parent";
    SelectorType["Sibling"] = "sibling";
    SelectorType["ColumnCombinator"] = "column-combinator";
})(SelectorType || (SelectorType = {}));
var AttributeAction;
(function (AttributeAction) {
    AttributeAction["Any"] = "any";
    AttributeAction["Element"] = "element";
    AttributeAction["End"] = "end";
    AttributeAction["Equals"] = "equals";
    AttributeAction["Exists"] = "exists";
    AttributeAction["Hyphen"] = "hyphen";
    AttributeAction["Not"] = "not";
    AttributeAction["Start"] = "start";
})(AttributeAction || (AttributeAction = {}));

const reName = /^[^\\#]?(?:\\(?:[\da-f]{1,6}\s?|.)|[\w\-\u00b0-\uFFFF])+/;
const reEscape = /\\([\da-f]{1,6}\s?|(\s)|.)/gi;
const actionTypes = new Map([
    [126 /* Tilde */, AttributeAction.Element],
    [94 /* Circumflex */, AttributeAction.Start],
    [36 /* Dollar */, AttributeAction.End],
    [42 /* Asterisk */, AttributeAction.Any],
    [33 /* ExclamationMark */, AttributeAction.Not],
    [124 /* Pipe */, AttributeAction.Hyphen],
]);
// Pseudos, whose data property is parsed as well.
const unpackPseudos = new Set([
    "has",
    "not",
    "matches",
    "is",
    "where",
    "host",
    "host-context",
]);
/**
 * Checks whether a specific selector is a traversal.
 * This is useful eg. in swapping the order of elements that
 * are not traversals.
 *
 * @param selector Selector to check.
 */
function isTraversal$1(selector) {
    switch (selector.type) {
        case SelectorType.Adjacent:
        case SelectorType.Child:
        case SelectorType.Descendant:
        case SelectorType.Parent:
        case SelectorType.Sibling:
        case SelectorType.ColumnCombinator:
            return true;
        default:
            return false;
    }
}
const stripQuotesFromPseudos = new Set(["contains", "icontains"]);
// Unescape function taken from https://github.com/jquery/sizzle/blob/master/src/sizzle.js#L152
function funescape(_, escaped, escapedWhitespace) {
    const high = parseInt(escaped, 16) - 0x10000;
    // NaN means non-codepoint
    return high !== high || escapedWhitespace
        ? escaped
        : high < 0
            ? // BMP codepoint
                String.fromCharCode(high + 0x10000)
            : // Supplemental Plane codepoint (surrogate pair)
                String.fromCharCode((high >> 10) | 0xd800, (high & 0x3ff) | 0xdc00);
}
function unescapeCSS(str) {
    return str.replace(reEscape, funescape);
}
function isQuote(c) {
    return c === 39 /* SingleQuote */ || c === 34 /* DoubleQuote */;
}
function isWhitespace(c) {
    return (c === 32 /* Space */ ||
        c === 9 /* Tab */ ||
        c === 10 /* NewLine */ ||
        c === 12 /* FormFeed */ ||
        c === 13 /* CarriageReturn */);
}
/**
 * Parses `selector`, optionally with the passed `options`.
 *
 * @param selector Selector to parse.
 * @param options Options for parsing.
 * @returns Returns a two-dimensional array.
 * The first dimension represents selectors separated by commas (eg. `sub1, sub2`),
 * the second contains the relevant tokens for that selector.
 */
function parse$4(selector) {
    const subselects = [];
    const endIndex = parseSelector(subselects, `${selector}`, 0);
    if (endIndex < selector.length) {
        throw new Error(`Unmatched selector: ${selector.slice(endIndex)}`);
    }
    return subselects;
}
function parseSelector(subselects, selector, selectorIndex) {
    let tokens = [];
    function getName(offset) {
        const match = selector.slice(selectorIndex + offset).match(reName);
        if (!match) {
            throw new Error(`Expected name, found ${selector.slice(selectorIndex)}`);
        }
        const [name] = match;
        selectorIndex += offset + name.length;
        return unescapeCSS(name);
    }
    function stripWhitespace(offset) {
        selectorIndex += offset;
        while (selectorIndex < selector.length &&
            isWhitespace(selector.charCodeAt(selectorIndex))) {
            selectorIndex++;
        }
    }
    function readValueWithParenthesis() {
        selectorIndex += 1;
        const start = selectorIndex;
        let counter = 1;
        for (; counter > 0 && selectorIndex < selector.length; selectorIndex++) {
            if (selector.charCodeAt(selectorIndex) ===
                40 /* LeftParenthesis */ &&
                !isEscaped(selectorIndex)) {
                counter++;
            }
            else if (selector.charCodeAt(selectorIndex) ===
                41 /* RightParenthesis */ &&
                !isEscaped(selectorIndex)) {
                counter--;
            }
        }
        if (counter) {
            throw new Error("Parenthesis not matched");
        }
        return unescapeCSS(selector.slice(start, selectorIndex - 1));
    }
    function isEscaped(pos) {
        let slashCount = 0;
        while (selector.charCodeAt(--pos) === 92 /* BackSlash */)
            slashCount++;
        return (slashCount & 1) === 1;
    }
    function ensureNotTraversal() {
        if (tokens.length > 0 && isTraversal$1(tokens[tokens.length - 1])) {
            throw new Error("Did not expect successive traversals.");
        }
    }
    function addTraversal(type) {
        if (tokens.length > 0 &&
            tokens[tokens.length - 1].type === SelectorType.Descendant) {
            tokens[tokens.length - 1].type = type;
            return;
        }
        ensureNotTraversal();
        tokens.push({ type });
    }
    function addSpecialAttribute(name, action) {
        tokens.push({
            type: SelectorType.Attribute,
            name,
            action,
            value: getName(1),
            namespace: null,
            ignoreCase: "quirks",
        });
    }
    /**
     * We have finished parsing the current part of the selector.
     *
     * Remove descendant tokens at the end if they exist,
     * and return the last index, so that parsing can be
     * picked up from here.
     */
    function finalizeSubselector() {
        if (tokens.length &&
            tokens[tokens.length - 1].type === SelectorType.Descendant) {
            tokens.pop();
        }
        if (tokens.length === 0) {
            throw new Error("Empty sub-selector");
        }
        subselects.push(tokens);
    }
    stripWhitespace(0);
    if (selector.length === selectorIndex) {
        return selectorIndex;
    }
    loop: while (selectorIndex < selector.length) {
        const firstChar = selector.charCodeAt(selectorIndex);
        switch (firstChar) {
            // Whitespace
            case 32 /* Space */:
            case 9 /* Tab */:
            case 10 /* NewLine */:
            case 12 /* FormFeed */:
            case 13 /* CarriageReturn */: {
                if (tokens.length === 0 ||
                    tokens[0].type !== SelectorType.Descendant) {
                    ensureNotTraversal();
                    tokens.push({ type: SelectorType.Descendant });
                }
                stripWhitespace(1);
                break;
            }
            // Traversals
            case 62 /* GreaterThan */: {
                addTraversal(SelectorType.Child);
                stripWhitespace(1);
                break;
            }
            case 60 /* LessThan */: {
                addTraversal(SelectorType.Parent);
                stripWhitespace(1);
                break;
            }
            case 126 /* Tilde */: {
                addTraversal(SelectorType.Sibling);
                stripWhitespace(1);
                break;
            }
            case 43 /* Plus */: {
                addTraversal(SelectorType.Adjacent);
                stripWhitespace(1);
                break;
            }
            // Special attribute selectors: .class, #id
            case 46 /* Period */: {
                addSpecialAttribute("class", AttributeAction.Element);
                break;
            }
            case 35 /* Hash */: {
                addSpecialAttribute("id", AttributeAction.Equals);
                break;
            }
            case 91 /* LeftSquareBracket */: {
                stripWhitespace(1);
                // Determine attribute name and namespace
                let name;
                let namespace = null;
                if (selector.charCodeAt(selectorIndex) === 124 /* Pipe */) {
                    // Equivalent to no namespace
                    name = getName(1);
                }
                else if (selector.startsWith("*|", selectorIndex)) {
                    namespace = "*";
                    name = getName(2);
                }
                else {
                    name = getName(0);
                    if (selector.charCodeAt(selectorIndex) === 124 /* Pipe */ &&
                        selector.charCodeAt(selectorIndex + 1) !==
                            61 /* Equal */) {
                        namespace = name;
                        name = getName(1);
                    }
                }
                stripWhitespace(0);
                // Determine comparison operation
                let action = AttributeAction.Exists;
                const possibleAction = actionTypes.get(selector.charCodeAt(selectorIndex));
                if (possibleAction) {
                    action = possibleAction;
                    if (selector.charCodeAt(selectorIndex + 1) !==
                        61 /* Equal */) {
                        throw new Error("Expected `=`");
                    }
                    stripWhitespace(2);
                }
                else if (selector.charCodeAt(selectorIndex) === 61 /* Equal */) {
                    action = AttributeAction.Equals;
                    stripWhitespace(1);
                }
                // Determine value
                let value = "";
                let ignoreCase = null;
                if (action !== "exists") {
                    if (isQuote(selector.charCodeAt(selectorIndex))) {
                        const quote = selector.charCodeAt(selectorIndex);
                        let sectionEnd = selectorIndex + 1;
                        while (sectionEnd < selector.length &&
                            (selector.charCodeAt(sectionEnd) !== quote ||
                                isEscaped(sectionEnd))) {
                            sectionEnd += 1;
                        }
                        if (selector.charCodeAt(sectionEnd) !== quote) {
                            throw new Error("Attribute value didn't end");
                        }
                        value = unescapeCSS(selector.slice(selectorIndex + 1, sectionEnd));
                        selectorIndex = sectionEnd + 1;
                    }
                    else {
                        const valueStart = selectorIndex;
                        while (selectorIndex < selector.length &&
                            ((!isWhitespace(selector.charCodeAt(selectorIndex)) &&
                                selector.charCodeAt(selectorIndex) !==
                                    93 /* RightSquareBracket */) ||
                                isEscaped(selectorIndex))) {
                            selectorIndex += 1;
                        }
                        value = unescapeCSS(selector.slice(valueStart, selectorIndex));
                    }
                    stripWhitespace(0);
                    // See if we have a force ignore flag
                    const forceIgnore = selector.charCodeAt(selectorIndex) | 0x20;
                    // If the forceIgnore flag is set (either `i` or `s`), use that value
                    if (forceIgnore === 115 /* LowerS */) {
                        ignoreCase = false;
                        stripWhitespace(1);
                    }
                    else if (forceIgnore === 105 /* LowerI */) {
                        ignoreCase = true;
                        stripWhitespace(1);
                    }
                }
                if (selector.charCodeAt(selectorIndex) !==
                    93 /* RightSquareBracket */) {
                    throw new Error("Attribute selector didn't terminate");
                }
                selectorIndex += 1;
                const attributeSelector = {
                    type: SelectorType.Attribute,
                    name,
                    action,
                    value,
                    namespace,
                    ignoreCase,
                };
                tokens.push(attributeSelector);
                break;
            }
            case 58 /* Colon */: {
                if (selector.charCodeAt(selectorIndex + 1) === 58 /* Colon */) {
                    tokens.push({
                        type: SelectorType.PseudoElement,
                        name: getName(2).toLowerCase(),
                        data: selector.charCodeAt(selectorIndex) ===
                            40 /* LeftParenthesis */
                            ? readValueWithParenthesis()
                            : null,
                    });
                    continue;
                }
                const name = getName(1).toLowerCase();
                let data = null;
                if (selector.charCodeAt(selectorIndex) ===
                    40 /* LeftParenthesis */) {
                    if (unpackPseudos.has(name)) {
                        if (isQuote(selector.charCodeAt(selectorIndex + 1))) {
                            throw new Error(`Pseudo-selector ${name} cannot be quoted`);
                        }
                        data = [];
                        selectorIndex = parseSelector(data, selector, selectorIndex + 1);
                        if (selector.charCodeAt(selectorIndex) !==
                            41 /* RightParenthesis */) {
                            throw new Error(`Missing closing parenthesis in :${name} (${selector})`);
                        }
                        selectorIndex += 1;
                    }
                    else {
                        data = readValueWithParenthesis();
                        if (stripQuotesFromPseudos.has(name)) {
                            const quot = data.charCodeAt(0);
                            if (quot === data.charCodeAt(data.length - 1) &&
                                isQuote(quot)) {
                                data = data.slice(1, -1);
                            }
                        }
                        data = unescapeCSS(data);
                    }
                }
                tokens.push({ type: SelectorType.Pseudo, name, data });
                break;
            }
            case 44 /* Comma */: {
                finalizeSubselector();
                tokens = [];
                stripWhitespace(1);
                break;
            }
            default: {
                if (selector.startsWith("/*", selectorIndex)) {
                    const endIndex = selector.indexOf("*/", selectorIndex + 2);
                    if (endIndex < 0) {
                        throw new Error("Comment was not terminated");
                    }
                    selectorIndex = endIndex + 2;
                    // Remove leading whitespace
                    if (tokens.length === 0) {
                        stripWhitespace(0);
                    }
                    break;
                }
                let namespace = null;
                let name;
                if (firstChar === 42 /* Asterisk */) {
                    selectorIndex += 1;
                    name = "*";
                }
                else if (firstChar === 124 /* Pipe */) {
                    name = "";
                    if (selector.charCodeAt(selectorIndex + 1) === 124 /* Pipe */) {
                        addTraversal(SelectorType.ColumnCombinator);
                        stripWhitespace(2);
                        break;
                    }
                }
                else if (reName.test(selector.slice(selectorIndex))) {
                    name = getName(0);
                }
                else {
                    break loop;
                }
                if (selector.charCodeAt(selectorIndex) === 124 /* Pipe */ &&
                    selector.charCodeAt(selectorIndex + 1) !== 124 /* Pipe */) {
                    namespace = name;
                    if (selector.charCodeAt(selectorIndex + 1) ===
                        42 /* Asterisk */) {
                        name = "*";
                        selectorIndex += 2;
                    }
                    else {
                        name = getName(1);
                    }
                }
                tokens.push(name === "*"
                    ? { type: SelectorType.Universal, namespace }
                    : { type: SelectorType.Tag, name, namespace });
            }
        }
    }
    finalizeSubselector();
    return selectorIndex;
}

const procedure = new Map([
    [SelectorType.Universal, 50],
    [SelectorType.Tag, 30],
    [SelectorType.Attribute, 1],
    [SelectorType.Pseudo, 0],
]);
function isTraversal(token) {
    return !procedure.has(token.type);
}
const attributes = new Map([
    [AttributeAction.Exists, 10],
    [AttributeAction.Equals, 8],
    [AttributeAction.Not, 7],
    [AttributeAction.Start, 6],
    [AttributeAction.End, 6],
    [AttributeAction.Any, 5],
]);
/**
 * Sort the parts of the passed selector,
 * as there is potential for optimization
 * (some types of selectors are faster than others)
 *
 * @param arr Selector to sort
 */
function sortByProcedure(arr) {
    const procs = arr.map(getProcedure);
    for (let i = 1; i < arr.length; i++) {
        const procNew = procs[i];
        if (procNew < 0)
            continue;
        for (let j = i - 1; j >= 0 && procNew < procs[j]; j--) {
            const token = arr[j + 1];
            arr[j + 1] = arr[j];
            arr[j] = token;
            procs[j + 1] = procs[j];
            procs[j] = procNew;
        }
    }
}
function getProcedure(token) {
    var _a, _b;
    let proc = (_a = procedure.get(token.type)) !== null && _a !== void 0 ? _a : -1;
    if (token.type === SelectorType.Attribute) {
        proc = (_b = attributes.get(token.action)) !== null && _b !== void 0 ? _b : 4;
        if (token.action === AttributeAction.Equals && token.name === "id") {
            // Prefer ID selectors (eg. #ID)
            proc = 9;
        }
        if (token.ignoreCase) {
            /*
             * IgnoreCase adds some overhead, prefer "normal" token
             * this is a binary operation, to ensure it's still an int
             */
            proc >>= 1;
        }
    }
    else if (token.type === SelectorType.Pseudo) {
        if (!token.data) {
            proc = 3;
        }
        else if (token.name === "has" || token.name === "contains") {
            proc = 0; // Expensive in any case
        }
        else if (Array.isArray(token.data)) {
            // Eg. :matches, :not
            proc = Math.min(...token.data.map((d) => Math.min(...d.map(getProcedure))));
            // If we have traversals, try to avoid executing this selector
            if (proc < 0) {
                proc = 0;
            }
        }
        else {
            proc = 2;
        }
    }
    return proc;
}

/**
 * All reserved characters in a regex, used for escaping.
 *
 * Taken from XRegExp, (c) 2007-2020 Steven Levithan under the MIT license
 * https://github.com/slevithan/xregexp/blob/95eeebeb8fac8754d54eafe2b4743661ac1cf028/src/xregexp.js#L794
 */
const reChars = /[-[\]{}()*+?.,\\^$|#\s]/g;
function escapeRegex(value) {
    return value.replace(reChars, "\\$&");
}
/**
 * Attributes that are case-insensitive in HTML.
 *
 * @private
 * @see https://html.spec.whatwg.org/multipage/semantics-other.html#case-sensitivity-of-selectors
 */
const caseInsensitiveAttributes = new Set([
    "accept",
    "accept-charset",
    "align",
    "alink",
    "axis",
    "bgcolor",
    "charset",
    "checked",
    "clear",
    "codetype",
    "color",
    "compact",
    "declare",
    "defer",
    "dir",
    "direction",
    "disabled",
    "enctype",
    "face",
    "frame",
    "hreflang",
    "http-equiv",
    "lang",
    "language",
    "link",
    "media",
    "method",
    "multiple",
    "nohref",
    "noresize",
    "noshade",
    "nowrap",
    "readonly",
    "rel",
    "rev",
    "rules",
    "scope",
    "scrolling",
    "selected",
    "shape",
    "target",
    "text",
    "type",
    "valign",
    "valuetype",
    "vlink",
]);
function shouldIgnoreCase(selector, options) {
    return typeof selector.ignoreCase === "boolean"
        ? selector.ignoreCase
        : selector.ignoreCase === "quirks"
            ? !!options.quirksMode
            : !options.xmlMode && caseInsensitiveAttributes.has(selector.name);
}
/**
 * Attribute selectors
 */
const attributeRules = {
    equals(next, data, options) {
        const { adapter } = options;
        const { name } = data;
        let { value } = data;
        if (shouldIgnoreCase(data, options)) {
            value = value.toLowerCase();
            return (elem) => {
                const attr = adapter.getAttributeValue(elem, name);
                return (attr != null &&
                    attr.length === value.length &&
                    attr.toLowerCase() === value &&
                    next(elem));
            };
        }
        return (elem) => adapter.getAttributeValue(elem, name) === value && next(elem);
    },
    hyphen(next, data, options) {
        const { adapter } = options;
        const { name } = data;
        let { value } = data;
        const len = value.length;
        if (shouldIgnoreCase(data, options)) {
            value = value.toLowerCase();
            return function hyphenIC(elem) {
                const attr = adapter.getAttributeValue(elem, name);
                return (attr != null &&
                    (attr.length === len || attr.charAt(len) === "-") &&
                    attr.substr(0, len).toLowerCase() === value &&
                    next(elem));
            };
        }
        return function hyphen(elem) {
            const attr = adapter.getAttributeValue(elem, name);
            return (attr != null &&
                (attr.length === len || attr.charAt(len) === "-") &&
                attr.substr(0, len) === value &&
                next(elem));
        };
    },
    element(next, data, options) {
        const { adapter } = options;
        const { name, value } = data;
        if (/\s/.test(value)) {
            return boolbase$1.falseFunc;
        }
        const regex = new RegExp(`(?:^|\\s)${escapeRegex(value)}(?:$|\\s)`, shouldIgnoreCase(data, options) ? "i" : "");
        return function element(elem) {
            const attr = adapter.getAttributeValue(elem, name);
            return (attr != null &&
                attr.length >= value.length &&
                regex.test(attr) &&
                next(elem));
        };
    },
    exists(next, { name }, { adapter }) {
        return (elem) => adapter.hasAttrib(elem, name) && next(elem);
    },
    start(next, data, options) {
        const { adapter } = options;
        const { name } = data;
        let { value } = data;
        const len = value.length;
        if (len === 0) {
            return boolbase$1.falseFunc;
        }
        if (shouldIgnoreCase(data, options)) {
            value = value.toLowerCase();
            return (elem) => {
                const attr = adapter.getAttributeValue(elem, name);
                return (attr != null &&
                    attr.length >= len &&
                    attr.substr(0, len).toLowerCase() === value &&
                    next(elem));
            };
        }
        return (elem) => {
            var _a;
            return !!((_a = adapter.getAttributeValue(elem, name)) === null || _a === void 0 ? void 0 : _a.startsWith(value)) &&
                next(elem);
        };
    },
    end(next, data, options) {
        const { adapter } = options;
        const { name } = data;
        let { value } = data;
        const len = -value.length;
        if (len === 0) {
            return boolbase$1.falseFunc;
        }
        if (shouldIgnoreCase(data, options)) {
            value = value.toLowerCase();
            return (elem) => {
                var _a;
                return ((_a = adapter
                    .getAttributeValue(elem, name)) === null || _a === void 0 ? void 0 : _a.substr(len).toLowerCase()) === value && next(elem);
            };
        }
        return (elem) => {
            var _a;
            return !!((_a = adapter.getAttributeValue(elem, name)) === null || _a === void 0 ? void 0 : _a.endsWith(value)) &&
                next(elem);
        };
    },
    any(next, data, options) {
        const { adapter } = options;
        const { name, value } = data;
        if (value === "") {
            return boolbase$1.falseFunc;
        }
        if (shouldIgnoreCase(data, options)) {
            const regex = new RegExp(escapeRegex(value), "i");
            return function anyIC(elem) {
                const attr = adapter.getAttributeValue(elem, name);
                return (attr != null &&
                    attr.length >= value.length &&
                    regex.test(attr) &&
                    next(elem));
            };
        }
        return (elem) => {
            var _a;
            return !!((_a = adapter.getAttributeValue(elem, name)) === null || _a === void 0 ? void 0 : _a.includes(value)) &&
                next(elem);
        };
    },
    not(next, data, options) {
        const { adapter } = options;
        const { name } = data;
        let { value } = data;
        if (value === "") {
            return (elem) => !!adapter.getAttributeValue(elem, name) && next(elem);
        }
        else if (shouldIgnoreCase(data, options)) {
            value = value.toLowerCase();
            return (elem) => {
                const attr = adapter.getAttributeValue(elem, name);
                return ((attr == null ||
                    attr.length !== value.length ||
                    attr.toLowerCase() !== value) &&
                    next(elem));
            };
        }
        return (elem) => adapter.getAttributeValue(elem, name) !== value && next(elem);
    },
};

// Following http://www.w3.org/TR/css3-selectors/#nth-child-pseudo
// Whitespace as per https://www.w3.org/TR/selectors-3/#lex is " \t\r\n\f"
const whitespace = new Set([9, 10, 12, 13, 32]);
const ZERO = "0".charCodeAt(0);
const NINE = "9".charCodeAt(0);
/**
 * Parses an expression.
 *
 * @throws An `Error` if parsing fails.
 * @returns An array containing the integer step size and the integer offset of the nth rule.
 * @example nthCheck.parse("2n+3"); // returns [2, 3]
 */
function parse$3(formula) {
    formula = formula.trim().toLowerCase();
    if (formula === "even") {
        return [2, 0];
    }
    else if (formula === "odd") {
        return [2, 1];
    }
    // Parse [ ['-'|'+']? INTEGER? {N} [ S* ['-'|'+'] S* INTEGER ]?
    let idx = 0;
    let a = 0;
    let sign = readSign();
    let number = readNumber();
    if (idx < formula.length && formula.charAt(idx) === "n") {
        idx++;
        a = sign * (number !== null && number !== void 0 ? number : 1);
        skipWhitespace();
        if (idx < formula.length) {
            sign = readSign();
            skipWhitespace();
            number = readNumber();
        }
        else {
            sign = number = 0;
        }
    }
    // Throw if there is anything else
    if (number === null || idx < formula.length) {
        throw new Error(`n-th rule couldn't be parsed ('${formula}')`);
    }
    return [a, sign * number];
    function readSign() {
        if (formula.charAt(idx) === "-") {
            idx++;
            return -1;
        }
        if (formula.charAt(idx) === "+") {
            idx++;
        }
        return 1;
    }
    function readNumber() {
        const start = idx;
        let value = 0;
        while (idx < formula.length &&
            formula.charCodeAt(idx) >= ZERO &&
            formula.charCodeAt(idx) <= NINE) {
            value = value * 10 + (formula.charCodeAt(idx) - ZERO);
            idx++;
        }
        // Return `null` if we didn't read anything.
        return idx === start ? null : value;
    }
    function skipWhitespace() {
        while (idx < formula.length &&
            whitespace.has(formula.charCodeAt(idx))) {
            idx++;
        }
    }
}

/**
 * Returns a function that checks if an elements index matches the given rule
 * highly optimized to return the fastest solution.
 *
 * @param parsed A tuple [a, b], as returned by `parse`.
 * @returns A highly optimized function that returns whether an index matches the nth-check.
 * @example
 *
 * ```js
 * const check = nthCheck.compile([2, 3]);
 *
 * check(0); // `false`
 * check(1); // `false`
 * check(2); // `true`
 * check(3); // `false`
 * check(4); // `true`
 * check(5); // `false`
 * check(6); // `true`
 * ```
 */
function compile$2(parsed) {
    const a = parsed[0];
    // Subtract 1 from `b`, to convert from one- to zero-indexed.
    const b = parsed[1] - 1;
    /*
     * When `b <= 0`, `a * n` won't be lead to any matches for `a < 0`.
     * Besides, the specification states that no elements are
     * matched when `a` and `b` are 0.
     *
     * `b < 0` here as we subtracted 1 from `b` above.
     */
    if (b < 0 && a <= 0)
        return boolbase$1.falseFunc;
    // When `a` is in the range -1..1, it matches any element (so only `b` is checked).
    if (a === -1)
        return (index) => index <= b;
    if (a === 0)
        return (index) => index === b;
    // When `b <= 0` and `a === 1`, they match any element.
    if (a === 1)
        return b < 0 ? boolbase$1.trueFunc : (index) => index >= b;
    /*
     * Otherwise, modulo can be used to check if there is a match.
     *
     * Modulo doesn't care about the sign, so let's use `a`s absolute value.
     */
    const absA = Math.abs(a);
    // Get `b mod a`, + a if this is negative.
    const bMod = ((b % absA) + absA) % absA;
    return a > 1
        ? (index) => index >= b && index % absA === bMod
        : (index) => index <= b && index % absA === bMod;
}

/**
 * Parses and compiles a formula to a highly optimized function.
 * Combination of {@link parse} and {@link compile}.
 *
 * If the formula doesn't match any elements,
 * it returns [`boolbase`](https://github.com/fb55/boolbase)'s `falseFunc`.
 * Otherwise, a function accepting an _index_ is returned, which returns
 * whether or not the passed _index_ matches the formula.
 *
 * Note: The nth-rule starts counting at `1`, the returned function at `0`.
 *
 * @param formula The formula to compile.
 * @example
 * const check = nthCheck("2n+3");
 *
 * check(0); // `false`
 * check(1); // `false`
 * check(2); // `true`
 * check(3); // `false`
 * check(4); // `true`
 * check(5); // `false`
 * check(6); // `true`
 */
function nthCheck(formula) {
    return compile$2(parse$3(formula));
}

function getChildFunc(next, adapter) {
    return (elem) => {
        const parent = adapter.getParent(elem);
        return parent != null && adapter.isTag(parent) && next(elem);
    };
}
const filters = {
    contains(next, text, { adapter }) {
        return function contains(elem) {
            return next(elem) && adapter.getText(elem).includes(text);
        };
    },
    icontains(next, text, { adapter }) {
        const itext = text.toLowerCase();
        return function icontains(elem) {
            return (next(elem) &&
                adapter.getText(elem).toLowerCase().includes(itext));
        };
    },
    // Location specific methods
    "nth-child"(next, rule, { adapter, equals }) {
        const func = nthCheck(rule);
        if (func === boolbase$1.falseFunc)
            return boolbase$1.falseFunc;
        if (func === boolbase$1.trueFunc)
            return getChildFunc(next, adapter);
        return function nthChild(elem) {
            const siblings = adapter.getSiblings(elem);
            let pos = 0;
            for (let i = 0; i < siblings.length; i++) {
                if (equals(elem, siblings[i]))
                    break;
                if (adapter.isTag(siblings[i])) {
                    pos++;
                }
            }
            return func(pos) && next(elem);
        };
    },
    "nth-last-child"(next, rule, { adapter, equals }) {
        const func = nthCheck(rule);
        if (func === boolbase$1.falseFunc)
            return boolbase$1.falseFunc;
        if (func === boolbase$1.trueFunc)
            return getChildFunc(next, adapter);
        return function nthLastChild(elem) {
            const siblings = adapter.getSiblings(elem);
            let pos = 0;
            for (let i = siblings.length - 1; i >= 0; i--) {
                if (equals(elem, siblings[i]))
                    break;
                if (adapter.isTag(siblings[i])) {
                    pos++;
                }
            }
            return func(pos) && next(elem);
        };
    },
    "nth-of-type"(next, rule, { adapter, equals }) {
        const func = nthCheck(rule);
        if (func === boolbase$1.falseFunc)
            return boolbase$1.falseFunc;
        if (func === boolbase$1.trueFunc)
            return getChildFunc(next, adapter);
        return function nthOfType(elem) {
            const siblings = adapter.getSiblings(elem);
            let pos = 0;
            for (let i = 0; i < siblings.length; i++) {
                const currentSibling = siblings[i];
                if (equals(elem, currentSibling))
                    break;
                if (adapter.isTag(currentSibling) &&
                    adapter.getName(currentSibling) === adapter.getName(elem)) {
                    pos++;
                }
            }
            return func(pos) && next(elem);
        };
    },
    "nth-last-of-type"(next, rule, { adapter, equals }) {
        const func = nthCheck(rule);
        if (func === boolbase$1.falseFunc)
            return boolbase$1.falseFunc;
        if (func === boolbase$1.trueFunc)
            return getChildFunc(next, adapter);
        return function nthLastOfType(elem) {
            const siblings = adapter.getSiblings(elem);
            let pos = 0;
            for (let i = siblings.length - 1; i >= 0; i--) {
                const currentSibling = siblings[i];
                if (equals(elem, currentSibling))
                    break;
                if (adapter.isTag(currentSibling) &&
                    adapter.getName(currentSibling) === adapter.getName(elem)) {
                    pos++;
                }
            }
            return func(pos) && next(elem);
        };
    },
    // TODO determine the actual root element
    root(next, _rule, { adapter }) {
        return (elem) => {
            const parent = adapter.getParent(elem);
            return (parent == null || !adapter.isTag(parent)) && next(elem);
        };
    },
    scope(next, rule, options, context) {
        const { equals } = options;
        if (!context || context.length === 0) {
            // Equivalent to :root
            return filters["root"](next, rule, options);
        }
        if (context.length === 1) {
            // NOTE: can't be unpacked, as :has uses this for side-effects
            return (elem) => equals(context[0], elem) && next(elem);
        }
        return (elem) => context.includes(elem) && next(elem);
    },
    hover: dynamicStatePseudo("isHovered"),
    visited: dynamicStatePseudo("isVisited"),
    active: dynamicStatePseudo("isActive"),
};
/**
 * Dynamic state pseudos. These depend on optional Adapter methods.
 *
 * @param name The name of the adapter method to call.
 * @returns Pseudo for the `filters` object.
 */
function dynamicStatePseudo(name) {
    return function dynamicPseudo(next, _rule, { adapter }) {
        const func = adapter[name];
        if (typeof func !== "function") {
            return boolbase$1.falseFunc;
        }
        return function active(elem) {
            return func(elem) && next(elem);
        };
    };
}

// While filters are precompiled, pseudos get called when they are needed
const pseudos = {
    empty(elem, { adapter }) {
        return !adapter.getChildren(elem).some((elem) => 
        // FIXME: `getText` call is potentially expensive.
        adapter.isTag(elem) || adapter.getText(elem) !== "");
    },
    "first-child"(elem, { adapter, equals }) {
        if (adapter.prevElementSibling) {
            return adapter.prevElementSibling(elem) == null;
        }
        const firstChild = adapter
            .getSiblings(elem)
            .find((elem) => adapter.isTag(elem));
        return firstChild != null && equals(elem, firstChild);
    },
    "last-child"(elem, { adapter, equals }) {
        const siblings = adapter.getSiblings(elem);
        for (let i = siblings.length - 1; i >= 0; i--) {
            if (equals(elem, siblings[i]))
                return true;
            if (adapter.isTag(siblings[i]))
                break;
        }
        return false;
    },
    "first-of-type"(elem, { adapter, equals }) {
        const siblings = adapter.getSiblings(elem);
        const elemName = adapter.getName(elem);
        for (let i = 0; i < siblings.length; i++) {
            const currentSibling = siblings[i];
            if (equals(elem, currentSibling))
                return true;
            if (adapter.isTag(currentSibling) &&
                adapter.getName(currentSibling) === elemName) {
                break;
            }
        }
        return false;
    },
    "last-of-type"(elem, { adapter, equals }) {
        const siblings = adapter.getSiblings(elem);
        const elemName = adapter.getName(elem);
        for (let i = siblings.length - 1; i >= 0; i--) {
            const currentSibling = siblings[i];
            if (equals(elem, currentSibling))
                return true;
            if (adapter.isTag(currentSibling) &&
                adapter.getName(currentSibling) === elemName) {
                break;
            }
        }
        return false;
    },
    "only-of-type"(elem, { adapter, equals }) {
        const elemName = adapter.getName(elem);
        return adapter
            .getSiblings(elem)
            .every((sibling) => equals(elem, sibling) ||
            !adapter.isTag(sibling) ||
            adapter.getName(sibling) !== elemName);
    },
    "only-child"(elem, { adapter, equals }) {
        return adapter
            .getSiblings(elem)
            .every((sibling) => equals(elem, sibling) || !adapter.isTag(sibling));
    },
};
function verifyPseudoArgs(func, name, subselect, argIndex) {
    if (subselect === null) {
        if (func.length > argIndex) {
            throw new Error(`Pseudo-class :${name} requires an argument`);
        }
    }
    else if (func.length === argIndex) {
        throw new Error(`Pseudo-class :${name} doesn't have any arguments`);
    }
}

/**
 * Aliases are pseudos that are expressed as selectors.
 */
const aliases = {
    // Links
    "any-link": ":is(a, area, link)[href]",
    link: ":any-link:not(:visited)",
    // Forms
    // https://html.spec.whatwg.org/multipage/scripting.html#disabled-elements
    disabled: `:is(
        :is(button, input, select, textarea, optgroup, option)[disabled],
        optgroup[disabled] > option,
        fieldset[disabled]:not(fieldset[disabled] legend:first-of-type *)
    )`,
    enabled: ":not(:disabled)",
    checked: ":is(:is(input[type=radio], input[type=checkbox])[checked], option:selected)",
    required: ":is(input, select, textarea)[required]",
    optional: ":is(input, select, textarea):not([required])",
    // JQuery extensions
    // https://html.spec.whatwg.org/multipage/form-elements.html#concept-option-selectedness
    selected: "option:is([selected], select:not([multiple]):not(:has(> option[selected])) > :first-of-type)",
    checkbox: "[type=checkbox]",
    file: "[type=file]",
    password: "[type=password]",
    radio: "[type=radio]",
    reset: "[type=reset]",
    image: "[type=image]",
    submit: "[type=submit]",
    parent: ":not(:empty)",
    header: ":is(h1, h2, h3, h4, h5, h6)",
    button: ":is(button, input[type=button])",
    input: ":is(input, textarea, select, button)",
    text: "input:is(:not([type!='']), [type=text])",
};

/** Used as a placeholder for :has. Will be replaced with the actual element. */
const PLACEHOLDER_ELEMENT = {};
function ensureIsTag(next, adapter) {
    if (next === boolbase$1.falseFunc)
        return boolbase$1.falseFunc;
    return (elem) => adapter.isTag(elem) && next(elem);
}
function getNextSiblings(elem, adapter) {
    const siblings = adapter.getSiblings(elem);
    if (siblings.length <= 1)
        return [];
    const elemIndex = siblings.indexOf(elem);
    if (elemIndex < 0 || elemIndex === siblings.length - 1)
        return [];
    return siblings.slice(elemIndex + 1).filter(adapter.isTag);
}
function copyOptions(options) {
    // Not copied: context, rootFunc
    return {
        xmlMode: !!options.xmlMode,
        lowerCaseAttributeNames: !!options.lowerCaseAttributeNames,
        lowerCaseTags: !!options.lowerCaseTags,
        quirksMode: !!options.quirksMode,
        cacheResults: !!options.cacheResults,
        pseudos: options.pseudos,
        adapter: options.adapter,
        equals: options.equals,
    };
}
const is$1 = (next, token, options, context, compileToken) => {
    const func = compileToken(token, copyOptions(options), context);
    return func === boolbase$1.trueFunc
        ? next
        : func === boolbase$1.falseFunc
            ? boolbase$1.falseFunc
            : (elem) => func(elem) && next(elem);
};
/*
 * :not, :has, :is, :matches and :where have to compile selectors
 * doing this in src/pseudos.ts would lead to circular dependencies,
 * so we add them here
 */
const subselects = {
    is: is$1,
    /**
     * `:matches` and `:where` are aliases for `:is`.
     */
    matches: is$1,
    where: is$1,
    not(next, token, options, context, compileToken) {
        const func = compileToken(token, copyOptions(options), context);
        return func === boolbase$1.falseFunc
            ? next
            : func === boolbase$1.trueFunc
                ? boolbase$1.falseFunc
                : (elem) => !func(elem) && next(elem);
    },
    has(next, subselect, options, _context, compileToken) {
        const { adapter } = options;
        const opts = copyOptions(options);
        opts.relativeSelector = true;
        const context = subselect.some((s) => s.some(isTraversal))
            ? // Used as a placeholder. Will be replaced with the actual element.
                [PLACEHOLDER_ELEMENT]
            : undefined;
        const compiled = compileToken(subselect, opts, context);
        if (compiled === boolbase$1.falseFunc)
            return boolbase$1.falseFunc;
        const hasElement = ensureIsTag(compiled, adapter);
        // If `compiled` is `trueFunc`, we can skip this.
        if (context && compiled !== boolbase$1.trueFunc) {
            /*
             * `shouldTestNextSiblings` will only be true if the query starts with
             * a traversal (sibling or adjacent). That means we will always have a context.
             */
            const { shouldTestNextSiblings = false } = compiled;
            return (elem) => {
                if (!next(elem))
                    return false;
                context[0] = elem;
                const childs = adapter.getChildren(elem);
                const nextElements = shouldTestNextSiblings
                    ? [...childs, ...getNextSiblings(elem, adapter)]
                    : childs;
                return adapter.existsOne(hasElement, nextElements);
            };
        }
        return (elem) => next(elem) &&
            adapter.existsOne(hasElement, adapter.getChildren(elem));
    },
};

function compilePseudoSelector(next, selector, options, context, compileToken) {
    var _a;
    const { name, data } = selector;
    if (Array.isArray(data)) {
        if (!(name in subselects)) {
            throw new Error(`Unknown pseudo-class :${name}(${data})`);
        }
        return subselects[name](next, data, options, context, compileToken);
    }
    const userPseudo = (_a = options.pseudos) === null || _a === void 0 ? void 0 : _a[name];
    const stringPseudo = typeof userPseudo === "string" ? userPseudo : aliases[name];
    if (typeof stringPseudo === "string") {
        if (data != null) {
            throw new Error(`Pseudo ${name} doesn't have any arguments`);
        }
        // The alias has to be parsed here, to make sure options are respected.
        const alias = parse$4(stringPseudo);
        return subselects["is"](next, alias, options, context, compileToken);
    }
    if (typeof userPseudo === "function") {
        verifyPseudoArgs(userPseudo, name, data, 1);
        return (elem) => userPseudo(elem, data) && next(elem);
    }
    if (name in filters) {
        return filters[name](next, data, options, context);
    }
    if (name in pseudos) {
        const pseudo = pseudos[name];
        verifyPseudoArgs(pseudo, name, data, 2);
        return (elem) => pseudo(elem, options, data) && next(elem);
    }
    throw new Error(`Unknown pseudo-class :${name}`);
}

function getElementParent(node, adapter) {
    const parent = adapter.getParent(node);
    if (parent && adapter.isTag(parent)) {
        return parent;
    }
    return null;
}
/*
 * All available rules
 */
function compileGeneralSelector(next, selector, options, context, compileToken) {
    const { adapter, equals } = options;
    switch (selector.type) {
        case SelectorType.PseudoElement: {
            throw new Error("Pseudo-elements are not supported by css-select");
        }
        case SelectorType.ColumnCombinator: {
            throw new Error("Column combinators are not yet supported by css-select");
        }
        case SelectorType.Attribute: {
            if (selector.namespace != null) {
                throw new Error("Namespaced attributes are not yet supported by css-select");
            }
            if (!options.xmlMode || options.lowerCaseAttributeNames) {
                selector.name = selector.name.toLowerCase();
            }
            return attributeRules[selector.action](next, selector, options);
        }
        case SelectorType.Pseudo: {
            return compilePseudoSelector(next, selector, options, context, compileToken);
        }
        // Tags
        case SelectorType.Tag: {
            if (selector.namespace != null) {
                throw new Error("Namespaced tag names are not yet supported by css-select");
            }
            let { name } = selector;
            if (!options.xmlMode || options.lowerCaseTags) {
                name = name.toLowerCase();
            }
            return function tag(elem) {
                return adapter.getName(elem) === name && next(elem);
            };
        }
        // Traversal
        case SelectorType.Descendant: {
            if (options.cacheResults === false ||
                typeof WeakSet === "undefined") {
                return function descendant(elem) {
                    let current = elem;
                    while ((current = getElementParent(current, adapter))) {
                        if (next(current)) {
                            return true;
                        }
                    }
                    return false;
                };
            }
            // @ts-expect-error `ElementNode` is not extending object
            const isFalseCache = new WeakSet();
            return function cachedDescendant(elem) {
                let current = elem;
                while ((current = getElementParent(current, adapter))) {
                    if (!isFalseCache.has(current)) {
                        if (adapter.isTag(current) && next(current)) {
                            return true;
                        }
                        isFalseCache.add(current);
                    }
                }
                return false;
            };
        }
        case "_flexibleDescendant": {
            // Include element itself, only used while querying an array
            return function flexibleDescendant(elem) {
                let current = elem;
                do {
                    if (next(current))
                        return true;
                } while ((current = getElementParent(current, adapter)));
                return false;
            };
        }
        case SelectorType.Parent: {
            return function parent(elem) {
                return adapter
                    .getChildren(elem)
                    .some((elem) => adapter.isTag(elem) && next(elem));
            };
        }
        case SelectorType.Child: {
            return function child(elem) {
                const parent = adapter.getParent(elem);
                return parent != null && adapter.isTag(parent) && next(parent);
            };
        }
        case SelectorType.Sibling: {
            return function sibling(elem) {
                const siblings = adapter.getSiblings(elem);
                for (let i = 0; i < siblings.length; i++) {
                    const currentSibling = siblings[i];
                    if (equals(elem, currentSibling))
                        break;
                    if (adapter.isTag(currentSibling) && next(currentSibling)) {
                        return true;
                    }
                }
                return false;
            };
        }
        case SelectorType.Adjacent: {
            if (adapter.prevElementSibling) {
                return function adjacent(elem) {
                    const previous = adapter.prevElementSibling(elem);
                    return previous != null && next(previous);
                };
            }
            return function adjacent(elem) {
                const siblings = adapter.getSiblings(elem);
                let lastElement;
                for (let i = 0; i < siblings.length; i++) {
                    const currentSibling = siblings[i];
                    if (equals(elem, currentSibling))
                        break;
                    if (adapter.isTag(currentSibling)) {
                        lastElement = currentSibling;
                    }
                }
                return !!lastElement && next(lastElement);
            };
        }
        case SelectorType.Universal: {
            if (selector.namespace != null && selector.namespace !== "*") {
                throw new Error("Namespaced universal selectors are not yet supported by css-select");
            }
            return next;
        }
    }
}

/**
 * Compiles a selector to an executable function.
 *
 * @param selector Selector to compile.
 * @param options Compilation options.
 * @param context Optional context for the selector.
 */
function compile$1(selector, options, context) {
    const next = compileUnsafe(selector, options, context);
    return ensureIsTag(next, options.adapter);
}
function compileUnsafe(selector, options, context) {
    const token = typeof selector === "string" ? parse$4(selector) : selector;
    return compileToken(token, options, context);
}
function includesScopePseudo(t) {
    return (t.type === SelectorType.Pseudo &&
        (t.name === "scope" ||
            (Array.isArray(t.data) &&
                t.data.some((data) => data.some(includesScopePseudo)))));
}
const DESCENDANT_TOKEN = { type: SelectorType.Descendant };
const FLEXIBLE_DESCENDANT_TOKEN = {
    type: "_flexibleDescendant",
};
const SCOPE_TOKEN = {
    type: SelectorType.Pseudo,
    name: "scope",
    data: null,
};
/*
 * CSS 4 Spec (Draft): 3.4.1. Absolutizing a Relative Selector
 * http://www.w3.org/TR/selectors4/#absolutizing
 */
function absolutize(token, { adapter }, context) {
    // TODO Use better check if the context is a document
    const hasContext = !!(context === null || context === void 0 ? void 0 : context.every((e) => {
        const parent = adapter.isTag(e) && adapter.getParent(e);
        return e === PLACEHOLDER_ELEMENT || (parent && adapter.isTag(parent));
    }));
    for (const t of token) {
        if (t.length > 0 &&
            isTraversal(t[0]) &&
            t[0].type !== SelectorType.Descendant) ;
        else if (hasContext && !t.some(includesScopePseudo)) {
            t.unshift(DESCENDANT_TOKEN);
        }
        else {
            continue;
        }
        t.unshift(SCOPE_TOKEN);
    }
}
function compileToken(token, options, context) {
    var _a;
    token.forEach(sortByProcedure);
    context = (_a = options.context) !== null && _a !== void 0 ? _a : context;
    const isArrayContext = Array.isArray(context);
    const finalContext = context && (Array.isArray(context) ? context : [context]);
    // Check if the selector is relative
    if (options.relativeSelector !== false) {
        absolutize(token, options, finalContext);
    }
    else if (token.some((t) => t.length > 0 && isTraversal(t[0]))) {
        throw new Error("Relative selectors are not allowed when the `relativeSelector` option is disabled");
    }
    let shouldTestNextSiblings = false;
    const query = token
        .map((rules) => {
        if (rules.length >= 2) {
            const [first, second] = rules;
            if (first.type !== SelectorType.Pseudo ||
                first.name !== "scope") ;
            else if (isArrayContext &&
                second.type === SelectorType.Descendant) {
                rules[1] = FLEXIBLE_DESCENDANT_TOKEN;
            }
            else if (second.type === SelectorType.Adjacent ||
                second.type === SelectorType.Sibling) {
                shouldTestNextSiblings = true;
            }
        }
        return compileRules(rules, options, finalContext);
    })
        .reduce(reduceRules, boolbase$1.falseFunc);
    query.shouldTestNextSiblings = shouldTestNextSiblings;
    return query;
}
function compileRules(rules, options, context) {
    var _a;
    return rules.reduce((previous, rule) => previous === boolbase$1.falseFunc
        ? boolbase$1.falseFunc
        : compileGeneralSelector(previous, rule, options, context, compileToken), (_a = options.rootFunc) !== null && _a !== void 0 ? _a : boolbase$1.trueFunc);
}
function reduceRules(a, b) {
    if (b === boolbase$1.falseFunc || a === boolbase$1.trueFunc) {
        return a;
    }
    if (a === boolbase$1.falseFunc || b === boolbase$1.trueFunc) {
        return b;
    }
    return function combine(elem) {
        return a(elem) || b(elem);
    };
}

const defaultEquals = (a, b) => a === b;
const defaultOptions = {
    adapter: DomUtils,
    equals: defaultEquals,
};
function convertOptionFormats(options) {
    var _a, _b, _c, _d;
    /*
     * We force one format of options to the other one.
     */
    // @ts-expect-error Default options may have incompatible `Node` / `ElementNode`.
    const opts = options !== null && options !== void 0 ? options : defaultOptions;
    // @ts-expect-error Same as above.
    (_a = opts.adapter) !== null && _a !== void 0 ? _a : (opts.adapter = DomUtils);
    // @ts-expect-error `equals` does not exist on `Options`
    (_b = opts.equals) !== null && _b !== void 0 ? _b : (opts.equals = (_d = (_c = opts.adapter) === null || _c === void 0 ? void 0 : _c.equals) !== null && _d !== void 0 ? _d : defaultEquals);
    return opts;
}
function wrapCompile(func) {
    return function addAdapter(selector, options, context) {
        const opts = convertOptionFormats(options);
        return func(selector, opts, context);
    };
}
/**
 * Compiles the query, returns a function.
 */
const compile = wrapCompile(compile$1);
/**
 * Tests whether or not an element is matched by query.
 *
 * @template Node The generic Node type for the DOM adapter being used.
 * @template ElementNode The Node type for elements for the DOM adapter being used.
 * @param elem The element to test if it matches the query.
 * @param query can be either a CSS selector string or a compiled query function.
 * @param [options] options for querying the document.
 * @see compile for supported selector queries.
 * @returns
 */
function is(elem, query, options) {
    const opts = convertOptionFormats(options);
    return (typeof query === "function" ? query : compile$1(query, opts))(elem);
}

const {isArray} = Array;

/* c8 ignore start */
const isTag = ({nodeType}) => nodeType === ELEMENT_NODE;

const existsOne = (test, elements) => elements.some(
  element => isTag(element) && (
    test(element) ||
    existsOne(test, getChildren(element))
  )
);

const getAttributeValue = (element, name) => name === 'class' ?
                            element.classList.value : element.getAttribute(name);

const getChildren = ({childNodes}) => childNodes;

const getName = (element) => {
  const {localName} = element;
  return ignoreCase(element) ? localName.toLowerCase() : localName;
};

const getParent = ({parentNode}) => parentNode;

const getSiblings = element => {
  const {parentNode} = element;
  return parentNode ? getChildren(parentNode) : element;
};

const getText = node => {
  if (isArray(node))
    return node.map(getText).join('');
  if (isTag(node))
    return getText(getChildren(node));
  if (node.nodeType === TEXT_NODE)
    return node.data;
  return '';
};

const hasAttrib = (element, name) => element.hasAttribute(name);

const removeSubsets = nodes => {
  let {length} = nodes;
  while (length--) {
    const node = nodes[length];
    if (length && -1 < nodes.lastIndexOf(node, length - 1)) {
      nodes.splice(length, 1);
      continue;
    }
    for (let {parentNode} = node; parentNode; parentNode = parentNode.parentNode) {
      if (nodes.includes(parentNode)) {
        nodes.splice(length, 1);
        break;
      }
    }
  }
  return nodes;
};

const findAll = (test, nodes) => {
  const matches = [];
  for (const node of nodes) {
    if (isTag(node)) {
      if (test(node))
        matches.push(node);
      matches.push(...findAll(test, getChildren(node)));
    }
  }
  return matches;
};

const findOne = (test, nodes) => {
  for (let node of nodes)
    if (test(node) || (node = findOne(test, getChildren(node))))
      return node;
  return null;
};
/* c8 ignore stop */

const adapter = {
  isTag,
  existsOne,
  getAttributeValue,
  getChildren,
  getName,
  getParent,
  getSiblings,
  getText,
  hasAttrib,
  removeSubsets,
  findAll,
  findOne
};

const prepareMatch = (element, selectors) => compile(
  selectors,
  {
    context: selectors.includes(':scope') ? element : void 0,
    xmlMode: !ignoreCase(element),
    adapter
  }
);

const matches = (element, selectors) => is(
  element,
  selectors,
  {
    strict: true,
    context: selectors.includes(':scope') ? element : void 0,
    xmlMode: !ignoreCase(element),
    adapter
  }
);

/**
 * @implements globalThis.Text
 */
let Text$1 = class Text extends CharacterData$1 {
  constructor(ownerDocument, data = '') {
    super(ownerDocument, '#text', TEXT_NODE, data);
  }

  get wholeText() {
    const text = [];
    let {previousSibling, nextSibling} = this;
    while (previousSibling) {
      if (previousSibling.nodeType === TEXT_NODE)
        text.unshift(previousSibling[VALUE]);
      else
        break;
      previousSibling = previousSibling.previousSibling;
    }
    text.push(this[VALUE]);
    while (nextSibling) {
      if (nextSibling.nodeType === TEXT_NODE)
        text.push(nextSibling[VALUE]);
      else
        break;
      nextSibling = nextSibling.nextSibling;
    }
    return text.join('');
  }

  cloneNode() {
    const {ownerDocument, [VALUE]: data} = this;
    return new Text(ownerDocument, data);
  }

  toString() { return escape(this[VALUE]); }
};

// https://dom.spec.whatwg.org/#interface-parentnode
// Document, DocumentFragment, Element


const isNode = node => node instanceof Node$1;

const insert = (parentNode, child, nodes) => {
  const {ownerDocument} = parentNode;
  for (const node of nodes)
    parentNode.insertBefore(
      isNode(node) ? node : new Text$1(ownerDocument, node),
      child
    );
};

/** @typedef { import('../interface/element.js').Element & {
    [typeof NEXT]: NodeStruct,
    [typeof PREV]: NodeStruct,
    [typeof START]: NodeStruct,
    nodeType: typeof ATTRIBUTE_NODE | typeof DOCUMENT_FRAGMENT_NODE | typeof ELEMENT_NODE | typeof TEXT_NODE | typeof NODE_END | typeof COMMENT_NODE | typeof CDATA_SECTION_NODE,
    ownerDocument: Document,
    parentNode: ParentNode,
}} NodeStruct */

class ParentNode extends Node$1 {
  constructor(ownerDocument, localName, nodeType) {
    super(ownerDocument, localName, nodeType);
    this[PRIVATE] = null;
    /** @type {NodeStruct} */
    this[NEXT] = this[END] = {
      [NEXT]: null,
      [PREV]: this,
      [START]: this,
      nodeType: NODE_END,
      ownerDocument: this.ownerDocument,
      parentNode: null
    };
  }

  get childNodes() {
    const childNodes = new NodeList;
    let {firstChild} = this;
    while (firstChild) {
      childNodes.push(firstChild);
      firstChild = nextSibling(firstChild);
    }
    return childNodes;
  }

  get children() {
    const children = new NodeList;
    let {firstElementChild} = this;
    while (firstElementChild) {
      children.push(firstElementChild);
      firstElementChild = nextElementSibling(firstElementChild);
    }
    return children;
  }

  /**
   * @returns {NodeStruct | null}
   */
  get firstChild() {
    let {[NEXT]: next, [END]: end} = this;
    while (next.nodeType === ATTRIBUTE_NODE)
      next = next[NEXT];
    return next === end ? null : next;
  }

  /**
   * @returns {NodeStruct | null}
   */
  get firstElementChild() {
    let {firstChild} = this;
    while (firstChild) {
      if (firstChild.nodeType === ELEMENT_NODE)
        return firstChild;
      firstChild = nextSibling(firstChild);
    }
    return null;
  }

  get lastChild() {
    const prev = this[END][PREV];
    switch (prev.nodeType) {
      case NODE_END:
        return prev[START];
      case ATTRIBUTE_NODE:
        return null;
    }
    return prev === this ? null : prev;
  }

  get lastElementChild() {
    let {lastChild} = this;
    while (lastChild) {
      if (lastChild.nodeType === ELEMENT_NODE)
        return lastChild;
      lastChild = previousSibling(lastChild);
    }
    return null;
  }

  get childElementCount() {
    return this.children.length;
  }

  prepend(...nodes) {
    insert(this, this.firstChild, nodes);
  }

  append(...nodes) {
    insert(this, this[END], nodes);
  }

  replaceChildren(...nodes) {
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end && next.nodeType === ATTRIBUTE_NODE)
      next = next[NEXT];
    while (next !== end) {
      const after = getEnd(next)[NEXT];
      next.remove();
      next = after;
    }
    if (nodes.length)
      insert(this, end, nodes);
  }

  getElementsByClassName(className) {
    const elements = new NodeList;
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      if (
        next.nodeType === ELEMENT_NODE &&
        next.hasAttribute('class') &&
        next.classList.has(className)
      )
        elements.push(next);
      next = next[NEXT];
    }
    return elements;
  }

  getElementsByTagName(tagName) {
    const elements = new NodeList;
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      if (next.nodeType === ELEMENT_NODE && (
        next.localName === tagName ||
        localCase(next) === tagName
      ))
        elements.push(next);
      next = next[NEXT];
    }
    return elements;
  }

  querySelector(selectors) {
    const matches = prepareMatch(this, selectors);
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      if (next.nodeType === ELEMENT_NODE && matches(next))
        return next;
      next = next.nodeType === ELEMENT_NODE && next.localName === 'template' ? next[END] : next[NEXT];
    }
    return null;
  }

  querySelectorAll(selectors) {
    const matches = prepareMatch(this, selectors);
    const elements = new NodeList;
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      if (next.nodeType === ELEMENT_NODE && matches(next))
        elements.push(next);
      next = next.nodeType === ELEMENT_NODE && next.localName === 'template' ? next[END] : next[NEXT];
    }
    return elements;
  }

  appendChild(node) {
    return this.insertBefore(node, this[END]);
  }

  contains(node) {
    let parentNode = node;
    while (parentNode && parentNode !== this)
      parentNode = parentNode.parentNode;
    return parentNode === this;
  }

  insertBefore(node, before = null) {
    if (node === before)
      return node;
    if (node === this)
      throw new Error('unable to append a node to itself');
    const next = before || this[END];
    switch (node.nodeType) {
      case ELEMENT_NODE:
        node.remove();
        node.parentNode = this;
        knownBoundaries(next[PREV], node, next);
        moCallback(node, null);
        connectedCallback(node);
        break;
      case DOCUMENT_FRAGMENT_NODE: {
        let {[PRIVATE]: parentNode, firstChild, lastChild} = node;
        if (firstChild) {
          knownSegment(next[PREV], firstChild, lastChild, next);
          knownAdjacent(node, node[END]);
          if (parentNode)
            parentNode.replaceChildren();
          do {
            firstChild.parentNode = this;
            moCallback(firstChild, null);
            if (firstChild.nodeType === ELEMENT_NODE)
              connectedCallback(firstChild);
          } while (
            firstChild !== lastChild &&
            (firstChild = nextSibling(firstChild))
          );
        }
        break;
      }
      case TEXT_NODE:
      case COMMENT_NODE:
      case CDATA_SECTION_NODE:
        node.remove();
      /* eslint no-fallthrough:0 */
      // this covers DOCUMENT_TYPE_NODE too
      default:
        node.parentNode = this;
        knownSiblings(next[PREV], node, next);
        moCallback(node, null);
        break;
    }
    return node;
  }

  normalize() {
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      const {[NEXT]: $next, [PREV]: $prev, nodeType} = next;
      if (nodeType === TEXT_NODE) {
        if (!next[VALUE])
          next.remove();
        else if ($prev && $prev.nodeType === TEXT_NODE) {
          $prev.textContent += next.textContent;
          next.remove();
        }
      }
      next = $next;
    }
  }

  removeChild(node) {
    if (node.parentNode !== this)
      throw new Error('node is not a child');
    node.remove();
    return node;
  }

  replaceChild(node, replaced) {
    const next = getEnd(replaced)[NEXT];
    replaced.remove();
    this.insertBefore(node, next);
    return replaced;
  }
}

// https://dom.spec.whatwg.org/#interface-nonelementparentnode
// Document, DocumentFragment


class NonElementParentNode extends ParentNode {
  getElementById(id) {
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      if (next.nodeType === ELEMENT_NODE && next.id === id)
        return next;
      next = next[NEXT];
    }
    return null;
  }

  cloneNode(deep) {
    const {ownerDocument, constructor} = this;
    const nonEPN = new constructor(ownerDocument);
    if (deep) {
      const {[END]: end} = nonEPN;
      for (const node of this.childNodes)
        nonEPN.insertBefore(node.cloneNode(deep), end);
    }
    return nonEPN; 
  }

  toString() {
    const {childNodes, localName} = this;
    return `<${localName}>${childNodes.join('')}</${localName}>`;
  }

  toJSON() {
    const json = [];
    nonElementAsJSON(this, json);
    return json;
  }
}

/**
 * @implements globalThis.DocumentFragment
 */
let DocumentFragment$1 = class DocumentFragment extends NonElementParentNode {
  constructor(ownerDocument) {
    super(ownerDocument, '#document-fragment', DOCUMENT_FRAGMENT_NODE);
  }
};

/**
 * @implements globalThis.DocumentType
 */
let DocumentType$1 = class DocumentType extends Node$1 {
  constructor(ownerDocument, name, publicId = '', systemId = '') {
    super(ownerDocument, '#document-type', DOCUMENT_TYPE_NODE);
    this.name = name;
    this.publicId = publicId;
    this.systemId = systemId;
  }

  cloneNode() {
    const {ownerDocument, name, publicId, systemId} = this;
    return new DocumentType(ownerDocument, name, publicId, systemId);
  }

  toString() {
    const {name, publicId, systemId} = this;
    const hasPublic = 0 < publicId.length;
    const str = [name];
    if (hasPublic)
      str.push('PUBLIC', `"${publicId}"`);
    if (systemId.length) {
      if (!hasPublic)
        str.push('SYSTEM');
      str.push(`"${systemId}"`);
    }
    return `<!DOCTYPE ${str.join(' ')}>`;
  }

  toJSON() {
    const json = [];
    documentTypeAsJSON(this, json);
    return json;
  }
};

/**
 * @param {Node} node
 * @returns {String}
 */
const getInnerHtml = node => node.childNodes.join('');

/**
 * @param {Node} node
 * @param {String} html
 */
const setInnerHtml = (node, html) => {
  const {ownerDocument} = node;
  const {constructor} = ownerDocument;
  const document = new constructor;
  document[CUSTOM_ELEMENTS] = ownerDocument[CUSTOM_ELEMENTS];
  const {childNodes} = parseFromString(document, ignoreCase(node), html);

  node.replaceChildren(...childNodes.map(setOwnerDocument, ownerDocument));
};

function setOwnerDocument(node) {
  node.ownerDocument = this;
  switch (node.nodeType) {
    case ELEMENT_NODE:
    case DOCUMENT_FRAGMENT_NODE:
      node.childNodes.forEach(setOwnerDocument, this);
      break;
  }
  return node;
}

var uhyphen = camel => camel.replace(/(([A-Z0-9])([A-Z0-9][a-z]))|(([a-z0-9]+)([A-Z]))/g, '$2$5-$3$6')
                             .toLowerCase();

const refs$1 = new WeakMap;

const key = name => `data-${uhyphen(name)}`;
const prop = name => name.slice(5).replace(/-([a-z])/g, (_, $1) => $1.toUpperCase());

const handler$2 = {
  get(dataset, name) {
    if (name in dataset)
      return refs$1.get(dataset).getAttribute(key(name));
  },

  set(dataset, name, value) {
    dataset[name] = value;
    refs$1.get(dataset).setAttribute(key(name), value);
    return true;
  },

  deleteProperty(dataset, name) {
    if (name in dataset)
      refs$1.get(dataset).removeAttribute(key(name));
    return delete dataset[name];
  }
};

/**
 * @implements globalThis.DOMStringMap
 */
class DOMStringMap {
  /**
   * @param {Element} ref
   */
  constructor(ref) {
    for (const {name, value} of ref.attributes) {
      if (/^data-/.test(name))
        this[prop(name)] = value;
    }
    refs$1.set(this, ref);
    return new Proxy(this, handler$2);
  }
}

setPrototypeOf(DOMStringMap.prototype, null);

const {add} = Set.prototype;
const addTokens = (self, tokens) => {
  for (const token of tokens) {
    if (token)
      add.call(self, token);
  }
};

const update = ({[OWNER_ELEMENT]: ownerElement, value}) => {
  const attribute = ownerElement.getAttributeNode('class');
  if (attribute)
    attribute.value = value;
  else
    setAttribute(
      ownerElement,
      new Attr$1(ownerElement.ownerDocument, 'class', value)
    );
};

/**
 * @implements globalThis.DOMTokenList
 */
class DOMTokenList extends Set {

  constructor(ownerElement) {
    super();
    this[OWNER_ELEMENT] = ownerElement;
    const attribute = ownerElement.getAttributeNode('class');
    if (attribute)
      addTokens(this, attribute.value.split(/\s+/));
  }

  get length() { return this.size; }

  get value() { return [...this].join(' '); }

  /**
   * @param  {...string} tokens
   */
  add(...tokens) {
    addTokens(this, tokens);
    update(this);
  }

  /**
   * @param {string} token
   */
  contains(token) { return this.has(token); }

  /**
   * @param  {...string} tokens
   */
  remove(...tokens) {
    for (const token of tokens)
      this.delete(token);
    update(this);
  }

  /**
   * @param {string} token
   * @param {boolean?} force
   */
  toggle(token, force) {
    if (this.has(token)) {
      if (force)
        return true;
      this.delete(token);
      update(this);
    }
    else if (force || arguments.length === 1) {
      super.add(token);
      update(this);
      return true;
    }
    return false;
  }

  /**
   * @param {string} token
   * @param {string} newToken
   */
  replace(token, newToken) {
    if (this.has(token)) {
      this.delete(token);
      super.add(newToken);
      update(this);
      return true;
    }
    return false;
  }

  /**
   * @param {string} token
   */
  supports() { return true; }
}

const refs = new WeakMap;

const getKeys = style => [...style.keys()].filter(key => key !== PRIVATE);

const updateKeys = style => {
  const attr = refs.get(style).getAttributeNode('style');
  if (!attr || attr[CHANGED] || style.get(PRIVATE) !== attr) {
    style.clear();
    if (attr) {
      style.set(PRIVATE, attr);
      for (const rule of attr[VALUE].split(/\s*;\s*/)) {
        let [key, ...rest] = rule.split(':');
        if (rest.length > 0) {
          key = key.trim();
          const value = rest.join(':').trim();
          if (key && value)
            style.set(key, value);
        }
      }
    }
  }
  return attr;
};

const handler$1 = {
  get(style, name) {
    if (name in prototype)
      return style[name];
    updateKeys(style);
    if (name === 'length')
      return getKeys(style).length;
    if (/^\d+$/.test(name))
      return getKeys(style)[name];
    return style.get(uhyphen(name));
  },

  set(style, name, value) {
    if (name === 'cssText')
      style[name] = value;
    else {
      let attr = updateKeys(style);
      if (value == null)
        style.delete(uhyphen(name));
      else
        style.set(uhyphen(name), value);
      if (!attr) {
        const element = refs.get(style);
        attr = element.ownerDocument.createAttribute('style');
        element.setAttributeNode(attr);
        style.set(PRIVATE, attr);
      }
      attr[CHANGED] = false;
      attr[VALUE] = style.toString();
    }
    return true;
  }
};

/**
 * @implements globalThis.CSSStyleDeclaration
 */
let CSSStyleDeclaration$1 = class CSSStyleDeclaration extends Map {
  constructor(element) {
    super();
    refs.set(this, element);
    /* c8 ignore start */
    return new Proxy(this, handler$1);
    /* c8 ignore stop */
  }

  get cssText() {
    return this.toString();
  }

  set cssText(value) {
    refs.get(this).setAttribute('style', value);
  }

  getPropertyValue(name) {
    const self = this[PRIVATE];
    return handler$1.get(self, name);
  }

  setProperty(name, value) {
    const self = this[PRIVATE];
    handler$1.set(self, name, value);
  }

  removeProperty(name) {
    const self = this[PRIVATE];
    handler$1.set(self, name, null);
  }

  [Symbol.iterator]() {
    const self = this[PRIVATE];
    updateKeys(self);
    const keys = getKeys(self);
    const {length} = keys;
    let i = 0;
    return {
      next() {
        const done = i === length;
        return {done, value: done ? null : keys[i++]};
      }
    };
  }

  get[PRIVATE]() { return this; }

  toString() {
    const self = this[PRIVATE];
    updateKeys(self);
    const cssText = [];
    self.forEach(push, cssText);
    return cssText.join(';');
  }
};

const {prototype} = CSSStyleDeclaration$1;

function push(value, key) {
  if (key !== PRIVATE)
    this.push(`${key}:${value}`);
}

// https://dom.spec.whatwg.org/#interface-event

/* c8 ignore start */

// Node 15 has Event but 14 and 12 don't
const BUBBLING_PHASE = 3;
const AT_TARGET = 2;
const CAPTURING_PHASE = 1;
const NONE = 0;

function getCurrentTarget(ev) {
  return ev.currentTarget;
}

/**
 * @implements globalThis.Event
 */
class GlobalEvent {
    static get BUBBLING_PHASE() { return BUBBLING_PHASE; }
    static get AT_TARGET() { return AT_TARGET; }
    static get CAPTURING_PHASE() { return CAPTURING_PHASE; }
    static get NONE() { return NONE; }

    constructor(type, eventInitDict = {}) {
      this.type = type;
      this.bubbles = !!eventInitDict.bubbles;
      this.cancelBubble = false;
      this._stopImmediatePropagationFlag = false;
      this.cancelable = !!eventInitDict.cancelable;
      this.eventPhase = this.NONE;
      this.timeStamp = Date.now();
      this.defaultPrevented = false;
      this.originalTarget = null;
      this.returnValue = null;
      this.srcElement = null;
      this.target = null;
      this._path = [];
    }

    get BUBBLING_PHASE() { return BUBBLING_PHASE; }
    get AT_TARGET() { return AT_TARGET; }
    get CAPTURING_PHASE() { return CAPTURING_PHASE; }
    get NONE() { return NONE; }

    preventDefault() { this.defaultPrevented = true; }

    // simplified implementation, should be https://dom.spec.whatwg.org/#dom-event-composedpath
    composedPath() {
      return this._path.map(getCurrentTarget);
    }

    stopPropagation() {
      this.cancelBubble = true;
    }
    
    stopImmediatePropagation() {
      this.stopPropagation();
      this._stopImmediatePropagationFlag = true;
    }
  }

/* c8 ignore stop */

/**
 * @implements globalThis.NamedNodeMap
 */
class NamedNodeMap extends Array {
  constructor(ownerElement) {
    super();
    this.ownerElement = ownerElement;
  }

  getNamedItem(name) {
    return this.ownerElement.getAttributeNode(name);
  }

  setNamedItem(attr) {
    this.ownerElement.setAttributeNode(attr);
    this.unshift(attr);
  }

  removeNamedItem(name) {
    const item = this.getNamedItem(name);
    this.ownerElement.removeAttribute(name);
    this.splice(this.indexOf(item), 1);
  }

  item(index) {
    return index < this.length ? this[index] : null;
  }

  /* c8 ignore start */
  getNamedItemNS(_, name) {
    return this.getNamedItem(name);
  }

  setNamedItemNS(_, attr) {
    return this.setNamedItem(attr);
  }

  removeNamedItemNS(_, name) {
    return this.removeNamedItem(name);
  }
  /* c8 ignore stop */
}

/**
 * @implements globalThis.ShadowRoot
 */
let ShadowRoot$1 = class ShadowRoot extends NonElementParentNode {
  constructor(host) {
    super(host.ownerDocument, '#shadow-root', DOCUMENT_FRAGMENT_NODE);
    this.host = host;
  }

  get innerHTML() {
    return getInnerHtml(this);
  }
  set innerHTML(html) {
    setInnerHtml(this, html);
  }
};

// https://dom.spec.whatwg.org/#interface-element


// <utils>
const attributesHandler = {
  get(target, key) {
    return key in target ? target[key] : target.find(({name}) => name === key);
  }
};

const create = (ownerDocument, element, localName)  => {
  if ('ownerSVGElement' in element) {
    const svg = ownerDocument.createElementNS(SVG_NAMESPACE, localName);
    svg.ownerSVGElement = element.ownerSVGElement;
    return svg;
  }
  return ownerDocument.createElement(localName);
};

const isVoid = ({localName, ownerDocument}) => {
  return ownerDocument[MIME].voidElements.test(localName);
};

// </utils>

/**
 * @implements globalThis.Element
 */
let Element$1 = class Element extends ParentNode {
  constructor(ownerDocument, localName) {
    super(ownerDocument, localName, ELEMENT_NODE);
    this[CLASS_LIST] = null;
    this[DATASET] = null;
    this[STYLE] = null;
  }

  // <Mixins>
  get isConnected() { return isConnected(this); }
  get parentElement() { return parentElement(this); }
  get previousSibling() { return previousSibling(this); }
  get nextSibling() { return nextSibling(this); }
  get namespaceURI() {
    return 'http://www.w3.org/1999/xhtml';
  }

  get previousElementSibling() { return previousElementSibling(this); }
  get nextElementSibling() { return nextElementSibling(this); }

  before(...nodes) { before(this, nodes); }
  after(...nodes) { after(this, nodes); }
  replaceWith(...nodes) { replaceWith(this, nodes); }
  remove() { remove(this[PREV], this, this[END][NEXT]); }
  // </Mixins>

  // <specialGetters>
  get id() { return stringAttribute.get(this, 'id'); }
  set id(value) { stringAttribute.set(this, 'id', value); }

  get className() { return this.classList.value; }
  set className(value) {
    const {classList} = this;
    classList.clear();
    classList.add(...($String(value).split(/\s+/)));
  }

  get nodeName() { return localCase(this); }
  get tagName() { return localCase(this); }

  get classList() {
    return this[CLASS_LIST] || (
      this[CLASS_LIST] = new DOMTokenList(this)
    );
  }

  get dataset() {
    return this[DATASET] || (
      this[DATASET] = new DOMStringMap(this)
    );
  }

  getBoundingClientRect() {
    return {
      x: 0,
      y: 0,
      bottom: 0,
      height: 0,
      left: 0,
      right: 0,
      top: 0,
      width: 0
    };
  }

  get nonce() { return stringAttribute.get(this, 'nonce'); }
  set nonce(value) { stringAttribute.set(this, 'nonce', value); }

  get style() {
    return this[STYLE] || (
      this[STYLE] = new CSSStyleDeclaration$1(this)
    );
  }

  get tabIndex() { return numericAttribute.get(this, 'tabindex') || -1; }
  set tabIndex(value) { numericAttribute.set(this, 'tabindex', value); }

  get slot() { return stringAttribute.get(this, 'slot'); }
  set slot(value) { stringAttribute.set(this, 'slot', value); }
  // </specialGetters>


  // <contentRelated>
  get innerText() {
    const text = [];
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      if (next.nodeType === TEXT_NODE) {
        text.push(next.textContent.replace(/\s+/g, ' '));
      } else if(
        text.length && next[NEXT] != end &&
        BLOCK_ELEMENTS.has(next.tagName)
      ) {
        text.push('\n');
      }
      next = next[NEXT];
    }
    return text.join('');
  }

  /**
   * @returns {String}
   */
  get textContent() {
    const text = [];
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      const nodeType = next.nodeType;
      if (nodeType === TEXT_NODE || nodeType === CDATA_SECTION_NODE)
        text.push(next.textContent);
      next = next[NEXT];
    }
    return text.join('');
  }

  set textContent(text) {
    this.replaceChildren();
    if (text != null && text !== '')
      this.appendChild(new Text$1(this.ownerDocument, text));
  }

  get innerHTML() {
    return getInnerHtml(this);
  }
  set innerHTML(html) {
    setInnerHtml(this, html);
  }

  get outerHTML() { return this.toString(); }
  set outerHTML(html) {
    const template = this.ownerDocument.createElement('');
    template.innerHTML = html;
    this.replaceWith(...template.childNodes);
  }
  // </contentRelated>

  // <attributes>
  get attributes() {
    const attributes = new NamedNodeMap(this);
    let next = this[NEXT];
    while (next.nodeType === ATTRIBUTE_NODE) {
      attributes.push(next);
      next = next[NEXT];
    }
    return new Proxy(attributes, attributesHandler);
  }

  focus() { this.dispatchEvent(new GlobalEvent('focus')); }

  getAttribute(name) {
    if (name === 'class')
      return this.className;
    const attribute = this.getAttributeNode(name);
    return attribute && (ignoreCase(this) ? attribute.value : escape(attribute.value));
  }

  getAttributeNode(name) {
    let next = this[NEXT];
    while (next.nodeType === ATTRIBUTE_NODE) {
      if (next.name === name)
        return next;
      next = next[NEXT];
    }
    return null;
  }

  getAttributeNames() {
    const attributes = new NodeList;
    let next = this[NEXT];
    while (next.nodeType === ATTRIBUTE_NODE) {
      attributes.push(next.name);
      next = next[NEXT];
    }
    return attributes;
  }

  hasAttribute(name) { return !!this.getAttributeNode(name); }
  hasAttributes() { return this[NEXT].nodeType === ATTRIBUTE_NODE; }

  removeAttribute(name) {
    if (name === 'class' && this[CLASS_LIST])
        this[CLASS_LIST].clear();
    let next = this[NEXT];
    while (next.nodeType === ATTRIBUTE_NODE) {
      if (next.name === name) {
        removeAttribute(this, next);
        return;
      }
      next = next[NEXT];
    }
  }

  removeAttributeNode(attribute) {
    let next = this[NEXT];
    while (next.nodeType === ATTRIBUTE_NODE) {
      if (next === attribute) {
        removeAttribute(this, next);
        return;
      }
      next = next[NEXT];
    }
  }

  setAttribute(name, value) {
    if (name === 'class')
      this.className = value;
    else {
      const attribute = this.getAttributeNode(name);
      if (attribute)
        attribute.value = value;
      else
        setAttribute(this, new Attr$1(this.ownerDocument, name, value));
    }
  }

  setAttributeNode(attribute) {
    const {name} = attribute;
    const previously = this.getAttributeNode(name);
    if (previously !== attribute) {
      if (previously)
        this.removeAttributeNode(previously);
      const {ownerElement} = attribute;
      if (ownerElement)
        ownerElement.removeAttributeNode(attribute);
      setAttribute(this, attribute);
    }
    return previously;
  }

  toggleAttribute(name, force) {
    if (this.hasAttribute(name)) {
      if (!force) {
        this.removeAttribute(name);
        return false;
      }
      return true;
    }
    else if (force || arguments.length === 1) {
      this.setAttribute(name, '');
      return true;
    }
    return false;
  }
  // </attributes>

  // <ShadowDOM>
  get shadowRoot() {
    if (shadowRoots.has(this)) {
      const {mode, shadowRoot} = shadowRoots.get(this);
      if (mode === 'open')
        return shadowRoot;
    }
    return null;
  }

  attachShadow(init) {
    if (shadowRoots.has(this))
      throw new Error('operation not supported');
    // TODO: shadowRoot should be likely a specialized class that extends DocumentFragment
    //       but until DSD is out, I am not sure I should spend time on this.
    const shadowRoot = new ShadowRoot$1(this);
    shadowRoots.set(this, {
      mode: init.mode,
      shadowRoot
    });
    return shadowRoot;
  }
  // </ShadowDOM>

  // <selectors>
  matches(selectors) { return matches(this, selectors); }
  closest(selectors) {
    let parentElement = this;
    const matches = prepareMatch(parentElement, selectors);
    while (parentElement && !matches(parentElement))
      parentElement = parentElement.parentElement;
    return parentElement;
  }
  // </selectors>

  // <insertAdjacent>
  insertAdjacentElement(position, element) {
    const {parentElement} = this;
    switch (position) {
      case 'beforebegin':
        if (parentElement) {
          parentElement.insertBefore(element, this);
          break;
        }
        return null;
      case 'afterbegin':
        this.insertBefore(element, this.firstChild);
        break;
      case 'beforeend':
        this.insertBefore(element, null);
        break;
      case 'afterend':
        if (parentElement) {
          parentElement.insertBefore(element, this.nextSibling);
          break;
        }
        return null;
    }
    return element;
  }

  insertAdjacentHTML(position, html) {
    const template = this.ownerDocument.createElement('template');
    template.innerHTML = html;
    this.insertAdjacentElement(position, template.content);
  }

  insertAdjacentText(position, text) {
    const node = this.ownerDocument.createTextNode(text);
    this.insertAdjacentElement(position, node);
  }
  // </insertAdjacent>

  cloneNode(deep = false) {
    const {ownerDocument, localName} = this;
    const addNext = next => {
      next.parentNode = parentNode;
      knownAdjacent($next, next);
      $next = next;
    };
    const clone = create(ownerDocument, this, localName);
    let parentNode = clone, $next = clone;
    let {[NEXT]: next, [END]: prev} = this;
    while (next !== prev && (deep || next.nodeType === ATTRIBUTE_NODE)) {
      switch (next.nodeType) {
        case NODE_END:
          knownAdjacent($next, parentNode[END]);
          $next = parentNode[END];
          parentNode = parentNode.parentNode;
          break;
        case ELEMENT_NODE: {
          const node = create(ownerDocument, next, next.localName);
          addNext(node);
          parentNode = node;
          break;
        }
        case ATTRIBUTE_NODE: {
          const attr = next.cloneNode(deep);
          attr.ownerElement = parentNode;
          addNext(attr);
          break;
        }
        case TEXT_NODE:
        case COMMENT_NODE:
        case CDATA_SECTION_NODE:
          addNext(next.cloneNode(deep));
          break;
      }
      next = next[NEXT];
    }
    knownAdjacent($next, clone[END]);
    return clone;
  }

  // <custom>
  toString() {
    const out = [];
    const {[END]: end} = this;
    let next = {[NEXT]: this};
    let isOpened = false;
    do {
      next = next[NEXT];
      switch (next.nodeType) {
        case ATTRIBUTE_NODE: {
          const attr = ' ' + next;
          switch (attr) {
            case ' id':
            case ' class':
            case ' style':
              break;
            default:
              out.push(attr);
          }
          break;
        }
        case NODE_END: {
          const start = next[START];
          if (isOpened) {
            if ('ownerSVGElement' in start)
              out.push(' />');
            else if (isVoid(start))
              out.push(ignoreCase(start) ? '>' : ' />');
            else
              out.push(`></${start.localName}>`);
            isOpened = false;
          }
          else
            out.push(`</${start.localName}>`);
          break;
        }
        case ELEMENT_NODE:
          if (isOpened)
            out.push('>');
          if (next.toString !== this.toString) {
            out.push(next.toString());
            next = next[END];
            isOpened = false;
          }
          else {
            out.push(`<${next.localName}`);
            isOpened = true;
          }
          break;
        case TEXT_NODE:
        case COMMENT_NODE:
        case CDATA_SECTION_NODE:
          out.push((isOpened ? '>' : '') + next);
          isOpened = false;
          break;
      }
    } while (next !== end);
    return out.join('');
  }

  toJSON() {
    const json = [];
    elementAsJSON(this, json);
    return json;
  }
  // </custom>


  /* c8 ignore start */
  getAttributeNS(_, name) { return this.getAttribute(name); }
  getElementsByTagNameNS(_, name) { return this.getElementsByTagName(name); }
  hasAttributeNS(_, name) { return this.hasAttribute(name); }
  removeAttributeNS(_, name) { this.removeAttribute(name); }
  setAttributeNS(_, name, value) { this.setAttribute(name, value); }
  setAttributeNodeNS(attr) { return this.setAttributeNode(attr); }
  /* c8 ignore stop */
};

const classNames = new WeakMap;

const handler = {
  get(target, name) {
    return target[name];
  },
  set(target, name, value) {
    target[name] = value;
    return true;
  }
};

/**
 * @implements globalThis.SVGElement
 */
let SVGElement$1 = class SVGElement extends Element$1 {
  constructor(ownerDocument, localName, ownerSVGElement = null) {
    super(ownerDocument, localName);
    this.ownerSVGElement = ownerSVGElement;
  }

  get className() {
    if (!classNames.has(this))
      classNames.set(this, new Proxy({baseVal: '', animVal: ''}, handler));
    return classNames.get(this);
  }

  /* c8 ignore start */
  set className(value) {
    const {classList} = this;
    classList.clear();
    classList.add(...($String(value).split(/\s+/)));
  }
  /* c8 ignore stop */

  get namespaceURI() {
    return 'http://www.w3.org/2000/svg';
  }

  getAttribute(name) {
    return name === 'class' ?
      [...this.classList].join(' ') :
      super.getAttribute(name);
  }

  setAttribute(name, value) {
    if (name === 'class')
      this.className = value;
    else if (name === 'style') {
      const {className} = this;
      className.baseVal = className.animVal = value;
    }
    super.setAttribute(name, value);
  }
};

/* c8 ignore start */
const illegalConstructor = () => {
  throw new TypeError('Illegal constructor');
};

function Attr() { illegalConstructor(); }
setPrototypeOf(Attr, Attr$1);
Attr.prototype = Attr$1.prototype;

function CDATASection() { illegalConstructor(); }
setPrototypeOf(CDATASection, CDATASection$1);
CDATASection.prototype = CDATASection$1.prototype;

function CharacterData() { illegalConstructor(); }
setPrototypeOf(CharacterData, CharacterData$1);
CharacterData.prototype = CharacterData$1.prototype;

function Comment() { illegalConstructor(); }
setPrototypeOf(Comment, Comment$1);
Comment.prototype = Comment$1.prototype;

function DocumentFragment() { illegalConstructor(); }
setPrototypeOf(DocumentFragment, DocumentFragment$1);
DocumentFragment.prototype = DocumentFragment$1.prototype;

function DocumentType() { illegalConstructor(); }
setPrototypeOf(DocumentType, DocumentType$1);
DocumentType.prototype = DocumentType$1.prototype;

function Element() { illegalConstructor(); }
setPrototypeOf(Element, Element$1);
Element.prototype = Element$1.prototype;

function Node() { illegalConstructor(); }
setPrototypeOf(Node, Node$1);
Node.prototype = Node$1.prototype;

function ShadowRoot() { illegalConstructor(); }
setPrototypeOf(ShadowRoot, ShadowRoot$1);
ShadowRoot.prototype = ShadowRoot$1.prototype;

function Text() { illegalConstructor(); }
setPrototypeOf(Text, Text$1);
Text.prototype = Text$1.prototype;

function SVGElement() { illegalConstructor(); }
setPrototypeOf(SVGElement, SVGElement$1);
SVGElement.prototype = SVGElement$1.prototype;
/* c8 ignore stop */

const Facades = {
  Attr,
  CDATASection,
  CharacterData,
  Comment,
  DocumentFragment,
  DocumentType,
  Element,
  Node,
  ShadowRoot,
  Text,
  SVGElement
};

const Level0 = new WeakMap;
const level0 = {
  get(element, name) {
    return Level0.has(element) && Level0.get(element)[name] || null;
  },
  set(element, name, value) {
    if (!Level0.has(element))
      Level0.set(element, {});
    const handlers = Level0.get(element);
    const type = name.slice(2);
    if (handlers[name])
      element.removeEventListener(type, handlers[name], false);
    if ((handlers[name] = value))
      element.addEventListener(type, value, false);
  }
};

/**
 * @implements globalThis.HTMLElement
 */
class HTMLElement extends Element$1 {

  static get observedAttributes() { return []; }

  constructor(ownerDocument = null, localName = '') {
    super(ownerDocument, localName);

    const ownerLess = !ownerDocument;
    let options;

    if (ownerLess) {
      const {constructor: Class} = this;
      if (!Classes.has(Class))
        throw new Error('unable to initialize this Custom Element');
      ({ownerDocument, localName, options} = Classes.get(Class));
    }

    if (ownerDocument[UPGRADE]) {
      const {element, values} = ownerDocument[UPGRADE];
      ownerDocument[UPGRADE] = null;
      for (const [key, value] of values)
        element[key] = value;
      return element;
    }

    if (ownerLess) {
      this.ownerDocument = this[END].ownerDocument = ownerDocument;
      this.localName = localName;
      customElements.set(this, {connected: false});
      if (options.is)
        this.setAttribute('is', options.is);
    }
  }

  /* c8 ignore start */

  /* TODO: what about these?
  offsetHeight
  offsetLeft
  offsetParent
  offsetTop
  offsetWidth
  */

  blur() { this.dispatchEvent(new GlobalEvent('blur')); }
  click() {
    const clickEvent = new GlobalEvent('click', {bubbles: true, cancelable: true});
    clickEvent.button = 0;

    this.dispatchEvent(clickEvent);
  }

  // Boolean getters
  get accessKeyLabel() {
    const {accessKey} = this;
    return accessKey && `Alt+Shift+${accessKey}`;
  }
  get isContentEditable() { return this.hasAttribute('contenteditable'); }

  // Boolean Accessors
  get contentEditable() { return booleanAttribute.get(this, 'contenteditable'); }
  set contentEditable(value) { booleanAttribute.set(this, 'contenteditable', value); }
  get draggable() { return booleanAttribute.get(this, 'draggable'); }
  set draggable(value) { booleanAttribute.set(this, 'draggable', value); }
  get hidden() { return booleanAttribute.get(this, 'hidden'); }
  set hidden(value) { booleanAttribute.set(this, 'hidden', value); }
  get spellcheck() { return booleanAttribute.get(this, 'spellcheck'); }
  set spellcheck(value) { booleanAttribute.set(this, 'spellcheck', value); }

  // String Accessors
  get accessKey() { return stringAttribute.get(this, 'accesskey'); }
  set accessKey(value) { stringAttribute.set(this, 'accesskey', value); }
  get dir() { return stringAttribute.get(this, 'dir'); }
  set dir(value) { stringAttribute.set(this, 'dir', value); }
  get lang() { return stringAttribute.get(this, 'lang'); }
  set lang(value) { stringAttribute.set(this, 'lang', value); }
  get title() { return stringAttribute.get(this, 'title'); }
  set title(value) { stringAttribute.set(this, 'title', value); }

  // DOM Level 0
  get onabort() { return level0.get(this, 'onabort'); }
  set onabort(value) { level0.set(this, 'onabort', value); }

  get onblur() { return level0.get(this, 'onblur'); }
  set onblur(value) { level0.set(this, 'onblur', value); }

  get oncancel() { return level0.get(this, 'oncancel'); }
  set oncancel(value) { level0.set(this, 'oncancel', value); }

  get oncanplay() { return level0.get(this, 'oncanplay'); }
  set oncanplay(value) { level0.set(this, 'oncanplay', value); }

  get oncanplaythrough() { return level0.get(this, 'oncanplaythrough'); }
  set oncanplaythrough(value) { level0.set(this, 'oncanplaythrough', value); }

  get onchange() { return level0.get(this, 'onchange'); }
  set onchange(value) { level0.set(this, 'onchange', value); }

  get onclick() { return level0.get(this, 'onclick'); }
  set onclick(value) { level0.set(this, 'onclick', value); }

  get onclose() { return level0.get(this, 'onclose'); }
  set onclose(value) { level0.set(this, 'onclose', value); }

  get oncontextmenu() { return level0.get(this, 'oncontextmenu'); }
  set oncontextmenu(value) { level0.set(this, 'oncontextmenu', value); }

  get oncuechange() { return level0.get(this, 'oncuechange'); }
  set oncuechange(value) { level0.set(this, 'oncuechange', value); }

  get ondblclick() { return level0.get(this, 'ondblclick'); }
  set ondblclick(value) { level0.set(this, 'ondblclick', value); }

  get ondrag() { return level0.get(this, 'ondrag'); }
  set ondrag(value) { level0.set(this, 'ondrag', value); }

  get ondragend() { return level0.get(this, 'ondragend'); }
  set ondragend(value) { level0.set(this, 'ondragend', value); }

  get ondragenter() { return level0.get(this, 'ondragenter'); }
  set ondragenter(value) { level0.set(this, 'ondragenter', value); }

  get ondragleave() { return level0.get(this, 'ondragleave'); }
  set ondragleave(value) { level0.set(this, 'ondragleave', value); }

  get ondragover() { return level0.get(this, 'ondragover'); }
  set ondragover(value) { level0.set(this, 'ondragover', value); }

  get ondragstart() { return level0.get(this, 'ondragstart'); }
  set ondragstart(value) { level0.set(this, 'ondragstart', value); }

  get ondrop() { return level0.get(this, 'ondrop'); }
  set ondrop(value) { level0.set(this, 'ondrop', value); }

  get ondurationchange() { return level0.get(this, 'ondurationchange'); }
  set ondurationchange(value) { level0.set(this, 'ondurationchange', value); }

  get onemptied() { return level0.get(this, 'onemptied'); }
  set onemptied(value) { level0.set(this, 'onemptied', value); }

  get onended() { return level0.get(this, 'onended'); }
  set onended(value) { level0.set(this, 'onended', value); }

  get onerror() { return level0.get(this, 'onerror'); }
  set onerror(value) { level0.set(this, 'onerror', value); }

  get onfocus() { return level0.get(this, 'onfocus'); }
  set onfocus(value) { level0.set(this, 'onfocus', value); }

  get oninput() { return level0.get(this, 'oninput'); }
  set oninput(value) { level0.set(this, 'oninput', value); }

  get oninvalid() { return level0.get(this, 'oninvalid'); }
  set oninvalid(value) { level0.set(this, 'oninvalid', value); }

  get onkeydown() { return level0.get(this, 'onkeydown'); }
  set onkeydown(value) { level0.set(this, 'onkeydown', value); }

  get onkeypress() { return level0.get(this, 'onkeypress'); }
  set onkeypress(value) { level0.set(this, 'onkeypress', value); }

  get onkeyup() { return level0.get(this, 'onkeyup'); }
  set onkeyup(value) { level0.set(this, 'onkeyup', value); }

  get onload() { return level0.get(this, 'onload'); }
  set onload(value) { level0.set(this, 'onload', value); }

  get onloadeddata() { return level0.get(this, 'onloadeddata'); }
  set onloadeddata(value) { level0.set(this, 'onloadeddata', value); }

  get onloadedmetadata() { return level0.get(this, 'onloadedmetadata'); }
  set onloadedmetadata(value) { level0.set(this, 'onloadedmetadata', value); }

  get onloadstart() { return level0.get(this, 'onloadstart'); }
  set onloadstart(value) { level0.set(this, 'onloadstart', value); }

  get onmousedown() { return level0.get(this, 'onmousedown'); }
  set onmousedown(value) { level0.set(this, 'onmousedown', value); }

  get onmouseenter() { return level0.get(this, 'onmouseenter'); }
  set onmouseenter(value) { level0.set(this, 'onmouseenter', value); }

  get onmouseleave() { return level0.get(this, 'onmouseleave'); }
  set onmouseleave(value) { level0.set(this, 'onmouseleave', value); }

  get onmousemove() { return level0.get(this, 'onmousemove'); }
  set onmousemove(value) { level0.set(this, 'onmousemove', value); }

  get onmouseout() { return level0.get(this, 'onmouseout'); }
  set onmouseout(value) { level0.set(this, 'onmouseout', value); }

  get onmouseover() { return level0.get(this, 'onmouseover'); }
  set onmouseover(value) { level0.set(this, 'onmouseover', value); }

  get onmouseup() { return level0.get(this, 'onmouseup'); }
  set onmouseup(value) { level0.set(this, 'onmouseup', value); }

  get onmousewheel() { return level0.get(this, 'onmousewheel'); }
  set onmousewheel(value) { level0.set(this, 'onmousewheel', value); }

  get onpause() { return level0.get(this, 'onpause'); }
  set onpause(value) { level0.set(this, 'onpause', value); }

  get onplay() { return level0.get(this, 'onplay'); }
  set onplay(value) { level0.set(this, 'onplay', value); }

  get onplaying() { return level0.get(this, 'onplaying'); }
  set onplaying(value) { level0.set(this, 'onplaying', value); }

  get onprogress() { return level0.get(this, 'onprogress'); }
  set onprogress(value) { level0.set(this, 'onprogress', value); }

  get onratechange() { return level0.get(this, 'onratechange'); }
  set onratechange(value) { level0.set(this, 'onratechange', value); }

  get onreset() { return level0.get(this, 'onreset'); }
  set onreset(value) { level0.set(this, 'onreset', value); }

  get onresize() { return level0.get(this, 'onresize'); }
  set onresize(value) { level0.set(this, 'onresize', value); }

  get onscroll() { return level0.get(this, 'onscroll'); }
  set onscroll(value) { level0.set(this, 'onscroll', value); }

  get onseeked() { return level0.get(this, 'onseeked'); }
  set onseeked(value) { level0.set(this, 'onseeked', value); }

  get onseeking() { return level0.get(this, 'onseeking'); }
  set onseeking(value) { level0.set(this, 'onseeking', value); }

  get onselect() { return level0.get(this, 'onselect'); }
  set onselect(value) { level0.set(this, 'onselect', value); }

  get onshow() { return level0.get(this, 'onshow'); }
  set onshow(value) { level0.set(this, 'onshow', value); }

  get onstalled() { return level0.get(this, 'onstalled'); }
  set onstalled(value) { level0.set(this, 'onstalled', value); }

  get onsubmit() { return level0.get(this, 'onsubmit'); }
  set onsubmit(value) { level0.set(this, 'onsubmit', value); }

  get onsuspend() { return level0.get(this, 'onsuspend'); }
  set onsuspend(value) { level0.set(this, 'onsuspend', value); }

  get ontimeupdate() { return level0.get(this, 'ontimeupdate'); }
  set ontimeupdate(value) { level0.set(this, 'ontimeupdate', value); }

  get ontoggle() { return level0.get(this, 'ontoggle'); }
  set ontoggle(value) { level0.set(this, 'ontoggle', value); }

  get onvolumechange() { return level0.get(this, 'onvolumechange'); }
  set onvolumechange(value) { level0.set(this, 'onvolumechange', value); }

  get onwaiting() { return level0.get(this, 'onwaiting'); }
  set onwaiting(value) { level0.set(this, 'onwaiting', value); }

  get onauxclick() { return level0.get(this, 'onauxclick'); }
  set onauxclick(value) { level0.set(this, 'onauxclick', value); }

  get ongotpointercapture() { return level0.get(this, 'ongotpointercapture'); }
  set ongotpointercapture(value) { level0.set(this, 'ongotpointercapture', value); }

  get onlostpointercapture() { return level0.get(this, 'onlostpointercapture'); }
  set onlostpointercapture(value) { level0.set(this, 'onlostpointercapture', value); }

  get onpointercancel() { return level0.get(this, 'onpointercancel'); }
  set onpointercancel(value) { level0.set(this, 'onpointercancel', value); }

  get onpointerdown() { return level0.get(this, 'onpointerdown'); }
  set onpointerdown(value) { level0.set(this, 'onpointerdown', value); }

  get onpointerenter() { return level0.get(this, 'onpointerenter'); }
  set onpointerenter(value) { level0.set(this, 'onpointerenter', value); }

  get onpointerleave() { return level0.get(this, 'onpointerleave'); }
  set onpointerleave(value) { level0.set(this, 'onpointerleave', value); }

  get onpointermove() { return level0.get(this, 'onpointermove'); }
  set onpointermove(value) { level0.set(this, 'onpointermove', value); }

  get onpointerout() { return level0.get(this, 'onpointerout'); }
  set onpointerout(value) { level0.set(this, 'onpointerout', value); }

  get onpointerover() { return level0.get(this, 'onpointerover'); }
  set onpointerover(value) { level0.set(this, 'onpointerover', value); }

  get onpointerup() { return level0.get(this, 'onpointerup'); }
  set onpointerup(value) { level0.set(this, 'onpointerup', value); }
  /* c8 ignore stop */

}

const tagName$h = 'template';

/**
 * @implements globalThis.HTMLTemplateElement
 */
class HTMLTemplateElement extends HTMLElement {
  constructor(ownerDocument) {
    super(ownerDocument, tagName$h);
    const content = this.ownerDocument.createDocumentFragment();
    (this[CONTENT] = content)[PRIVATE] = this;
  }

  get content() {
    if (this.hasChildNodes() && !this[CONTENT].hasChildNodes()) {
      for (const node of this.childNodes)
        this[CONTENT].appendChild(node.cloneNode(true));
    }
    return this[CONTENT];
  }
}

registerHTMLClass(tagName$h, HTMLTemplateElement);

/**
 * @implements globalThis.HTMLHtmlElement
 */
class HTMLHtmlElement extends HTMLElement {
  constructor(ownerDocument, localName = 'html') {
    super(ownerDocument, localName);
  }
}

const {toString} = HTMLElement.prototype;

class TextElement extends HTMLElement {

  get innerHTML() { return this.textContent; }
  set innerHTML(html) { this.textContent = html; }

  toString() {
    const outerHTML = toString.call(this.cloneNode());
    return outerHTML.replace('><', () => `>${this.textContent}<`);
  }
}

const tagName$g = 'script';

/**
 * @implements globalThis.HTMLScriptElement
 */
class HTMLScriptElement extends TextElement {
  constructor(ownerDocument, localName = tagName$g) {
    super(ownerDocument, localName);
  }

  get type() {
    return stringAttribute.get(this, 'type');
  }
  set type(value) {
    stringAttribute.set(this, 'type', value);
  }

  get src() {
    return stringAttribute.get(this, 'src');
  }
  set src(value) {
    stringAttribute.set(this, 'src', value);
  }

  get defer() {
    return booleanAttribute.get(this, 'defer');
  }

  set defer(value) {
    booleanAttribute.set(this, 'defer', value);
  }

  get crossOrigin() {
    return stringAttribute.get(this, 'crossorigin');
  }
  set crossOrigin(value) {
    stringAttribute.set(this, 'crossorigin', value);
  }

  get nomodule() {
    return booleanAttribute.get(this, 'nomodule');
  }
  set nomodule(value) {
    booleanAttribute.set(this, 'nomodule', value);
  }

  get referrerPolicy() {
    return stringAttribute.get(this, 'referrerpolicy');
  }
  set referrerPolicy(value) {
    stringAttribute.set(this, 'referrerpolicy', value);
  }

  get nonce() {
    return stringAttribute.get(this, 'nonce');
  }
  set nonce(value) {
    stringAttribute.set(this, 'nonce', value);
  }

  get async() {
    return booleanAttribute.get(this, 'async');
  }
  set async(value) {
    booleanAttribute.set(this, 'async', value);
  }

  get text() { return this.textContent; }
  set text(content) { this.textContent = content; }
}

registerHTMLClass(tagName$g, HTMLScriptElement);

/**
 * @implements globalThis.HTMLFrameElement
 */
class HTMLFrameElement extends HTMLElement {
  constructor(ownerDocument, localName = 'frame') {
    super(ownerDocument, localName);
  }
}

const tagName$f = 'iframe';

/**
 * @implements globalThis.HTMLIFrameElement
 */
class HTMLIFrameElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$f) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get src() { return stringAttribute.get(this, 'src'); }
  set src(value) { stringAttribute.set(this, 'src', value); }

  get srcdoc() { return stringAttribute.get(this, "srcdoc"); }
  set srcdoc(value) { stringAttribute.set(this, "srcdoc", value); }

  get name() { return stringAttribute.get(this, "name"); }
  set name(value) { stringAttribute.set(this, "name", value); }

  get allow() { return stringAttribute.get(this, "allow"); }
  set allow(value) { stringAttribute.set(this, "allow", value); }

  get allowFullscreen() { return booleanAttribute.get(this, "allowfullscreen"); }
  set allowFullscreen(value) { booleanAttribute.set(this, "allowfullscreen", value); }
  
  get referrerPolicy() { return stringAttribute.get(this, "referrerpolicy"); }
  set referrerPolicy(value) { stringAttribute.set(this, "referrerpolicy", value); }
  
  get loading() { return stringAttribute.get(this, "loading"); }
  set loading(value) { stringAttribute.set(this, "loading", value); }
  /* c8 ignore stop */
}

registerHTMLClass(tagName$f, HTMLIFrameElement);

/**
 * @implements globalThis.HTMLObjectElement
 */
class HTMLObjectElement extends HTMLElement {
  constructor(ownerDocument, localName = 'object') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLHeadElement
 */
class HTMLHeadElement extends HTMLElement {
  constructor(ownerDocument, localName = 'head') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLBodyElement
 */
class HTMLBodyElement extends HTMLElement {
  constructor(ownerDocument, localName = 'body') {
    super(ownerDocument, localName);
  }
}

var CSSStyleDeclaration = {};

var parse$2 = {};

var CSSStyleSheet = {};

var StyleSheet = {};

//.CommonJS
var CSSOM$c = {};
///CommonJS


/**
 * @constructor
 * @see http://dev.w3.org/csswg/cssom/#the-stylesheet-interface
 */
CSSOM$c.StyleSheet = function StyleSheet() {
	this.parentStyleSheet = null;
};


//.CommonJS
StyleSheet.StyleSheet = CSSOM$c.StyleSheet;

var CSSStyleRule = {};

var CSSRule = {};

//.CommonJS
var CSSOM$b = {};
///CommonJS


/**
 * @constructor
 * @see http://dev.w3.org/csswg/cssom/#the-cssrule-interface
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSRule
 */
CSSOM$b.CSSRule = function CSSRule() {
	this.parentRule = null;
	this.parentStyleSheet = null;
};

CSSOM$b.CSSRule.UNKNOWN_RULE = 0;                 // obsolete
CSSOM$b.CSSRule.STYLE_RULE = 1;
CSSOM$b.CSSRule.CHARSET_RULE = 2;                 // obsolete
CSSOM$b.CSSRule.IMPORT_RULE = 3;
CSSOM$b.CSSRule.MEDIA_RULE = 4;
CSSOM$b.CSSRule.FONT_FACE_RULE = 5;
CSSOM$b.CSSRule.PAGE_RULE = 6;
CSSOM$b.CSSRule.KEYFRAMES_RULE = 7;
CSSOM$b.CSSRule.KEYFRAME_RULE = 8;
CSSOM$b.CSSRule.MARGIN_RULE = 9;
CSSOM$b.CSSRule.NAMESPACE_RULE = 10;
CSSOM$b.CSSRule.COUNTER_STYLE_RULE = 11;
CSSOM$b.CSSRule.SUPPORTS_RULE = 12;
CSSOM$b.CSSRule.DOCUMENT_RULE = 13;
CSSOM$b.CSSRule.FONT_FEATURE_VALUES_RULE = 14;
CSSOM$b.CSSRule.VIEWPORT_RULE = 15;
CSSOM$b.CSSRule.REGION_STYLE_RULE = 16;


CSSOM$b.CSSRule.prototype = {
	constructor: CSSOM$b.CSSRule
	//FIXME
};


//.CommonJS
CSSRule.CSSRule = CSSOM$b.CSSRule;

var hasRequiredCSSStyleRule;

function requireCSSStyleRule () {
	if (hasRequiredCSSStyleRule) return CSSStyleRule;
	hasRequiredCSSStyleRule = 1;
	//.CommonJS
	var CSSOM = {
		CSSStyleDeclaration: requireCSSStyleDeclaration().CSSStyleDeclaration,
		CSSRule: CSSRule.CSSRule
	};
	///CommonJS


	/**
	 * @constructor
	 * @see http://dev.w3.org/csswg/cssom/#cssstylerule
	 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleRule
	 */
	CSSOM.CSSStyleRule = function CSSStyleRule() {
		CSSOM.CSSRule.call(this);
		this.selectorText = "";
		this.style = new CSSOM.CSSStyleDeclaration();
		this.style.parentRule = this;
	};

	CSSOM.CSSStyleRule.prototype = new CSSOM.CSSRule();
	CSSOM.CSSStyleRule.prototype.constructor = CSSOM.CSSStyleRule;
	CSSOM.CSSStyleRule.prototype.type = 1;

	Object.defineProperty(CSSOM.CSSStyleRule.prototype, "cssText", {
		get: function() {
			var text;
			if (this.selectorText) {
				text = this.selectorText + " {" + this.style.cssText + "}";
			} else {
				text = "";
			}
			return text;
		},
		set: function(cssText) {
			var rule = CSSOM.CSSStyleRule.parse(cssText);
			this.style = rule.style;
			this.selectorText = rule.selectorText;
		}
	});


	/**
	 * NON-STANDARD
	 * lightweight version of parse.js.
	 * @param {string} ruleText
	 * @return CSSStyleRule
	 */
	CSSOM.CSSStyleRule.parse = function(ruleText) {
		var i = 0;
		var state = "selector";
		var index;
		var j = i;
		var buffer = "";

		var SIGNIFICANT_WHITESPACE = {
			"selector": true,
			"value": true
		};

		var styleRule = new CSSOM.CSSStyleRule();
		var name, priority="";

		for (var character; (character = ruleText.charAt(i)); i++) {

			switch (character) {

			case " ":
			case "\t":
			case "\r":
			case "\n":
			case "\f":
				if (SIGNIFICANT_WHITESPACE[state]) {
					// Squash 2 or more white-spaces in the row into 1
					switch (ruleText.charAt(i - 1)) {
						case " ":
						case "\t":
						case "\r":
						case "\n":
						case "\f":
							break;
						default:
							buffer += " ";
							break;
					}
				}
				break;

			// String
			case '"':
				j = i + 1;
				index = ruleText.indexOf('"', j) + 1;
				if (!index) {
					throw '" is missing';
				}
				buffer += ruleText.slice(i, index);
				i = index - 1;
				break;

			case "'":
				j = i + 1;
				index = ruleText.indexOf("'", j) + 1;
				if (!index) {
					throw "' is missing";
				}
				buffer += ruleText.slice(i, index);
				i = index - 1;
				break;

			// Comment
			case "/":
				if (ruleText.charAt(i + 1) === "*") {
					i += 2;
					index = ruleText.indexOf("*/", i);
					if (index === -1) {
						throw new SyntaxError("Missing */");
					} else {
						i = index + 1;
					}
				} else {
					buffer += character;
				}
				break;

			case "{":
				if (state === "selector") {
					styleRule.selectorText = buffer.trim();
					buffer = "";
					state = "name";
				}
				break;

			case ":":
				if (state === "name") {
					name = buffer.trim();
					buffer = "";
					state = "value";
				} else {
					buffer += character;
				}
				break;

			case "!":
				if (state === "value" && ruleText.indexOf("!important", i) === i) {
					priority = "important";
					i += "important".length;
				} else {
					buffer += character;
				}
				break;

			case ";":
				if (state === "value") {
					styleRule.style.setProperty(name, buffer.trim(), priority);
					priority = "";
					buffer = "";
					state = "name";
				} else {
					buffer += character;
				}
				break;

			case "}":
				if (state === "value") {
					styleRule.style.setProperty(name, buffer.trim(), priority);
					priority = "";
					buffer = "";
				} else if (state === "name") {
					break;
				} else {
					buffer += character;
				}
				state = "selector";
				break;

			default:
				buffer += character;
				break;

			}
		}

		return styleRule;

	};


	//.CommonJS
	CSSStyleRule.CSSStyleRule = CSSOM.CSSStyleRule;
	///CommonJS
	return CSSStyleRule;
}

var hasRequiredCSSStyleSheet;

function requireCSSStyleSheet () {
	if (hasRequiredCSSStyleSheet) return CSSStyleSheet;
	hasRequiredCSSStyleSheet = 1;
	//.CommonJS
	var CSSOM = {
		StyleSheet: StyleSheet.StyleSheet,
		CSSStyleRule: requireCSSStyleRule().CSSStyleRule
	};
	///CommonJS


	/**
	 * @constructor
	 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet
	 */
	CSSOM.CSSStyleSheet = function CSSStyleSheet() {
		CSSOM.StyleSheet.call(this);
		this.cssRules = [];
	};


	CSSOM.CSSStyleSheet.prototype = new CSSOM.StyleSheet();
	CSSOM.CSSStyleSheet.prototype.constructor = CSSOM.CSSStyleSheet;


	/**
	 * Used to insert a new rule into the style sheet. The new rule now becomes part of the cascade.
	 *
	 *   sheet = new Sheet("body {margin: 0}")
	 *   sheet.toString()
	 *   -> "body{margin:0;}"
	 *   sheet.insertRule("img {border: none}", 0)
	 *   -> 0
	 *   sheet.toString()
	 *   -> "img{border:none;}body{margin:0;}"
	 *
	 * @param {string} rule
	 * @param {number} index
	 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet-insertRule
	 * @return {number} The index within the style sheet's rule collection of the newly inserted rule.
	 */
	CSSOM.CSSStyleSheet.prototype.insertRule = function(rule, index) {
		if (index < 0 || index > this.cssRules.length) {
			throw new RangeError("INDEX_SIZE_ERR");
		}
		var cssRule = CSSOM.parse(rule).cssRules[0];
		cssRule.parentStyleSheet = this;
		this.cssRules.splice(index, 0, cssRule);
		return index;
	};


	/**
	 * Used to delete a rule from the style sheet.
	 *
	 *   sheet = new Sheet("img{border:none} body{margin:0}")
	 *   sheet.toString()
	 *   -> "img{border:none;}body{margin:0;}"
	 *   sheet.deleteRule(0)
	 *   sheet.toString()
	 *   -> "body{margin:0;}"
	 *
	 * @param {number} index within the style sheet's rule list of the rule to remove.
	 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet-deleteRule
	 */
	CSSOM.CSSStyleSheet.prototype.deleteRule = function(index) {
		if (index < 0 || index >= this.cssRules.length) {
			throw new RangeError("INDEX_SIZE_ERR");
		}
		this.cssRules.splice(index, 1);
	};


	/**
	 * NON-STANDARD
	 * @return {string} serialize stylesheet
	 */
	CSSOM.CSSStyleSheet.prototype.toString = function() {
		var result = "";
		var rules = this.cssRules;
		for (var i=0; i<rules.length; i++) {
			result += rules[i].cssText + "\n";
		}
		return result;
	};


	//.CommonJS
	CSSStyleSheet.CSSStyleSheet = CSSOM.CSSStyleSheet;
	CSSOM.parse = requireParse().parse; // Cannot be included sooner due to the mutual dependency between parse.js and CSSStyleSheet.js
	///CommonJS
	return CSSStyleSheet;
}

var CSSImportRule = {};

var MediaList = {};

//.CommonJS
var CSSOM$a = {};
///CommonJS


/**
 * @constructor
 * @see http://dev.w3.org/csswg/cssom/#the-medialist-interface
 */
CSSOM$a.MediaList = function MediaList(){
	this.length = 0;
};

CSSOM$a.MediaList.prototype = {

	constructor: CSSOM$a.MediaList,

	/**
	 * @return {string}
	 */
	get mediaText() {
		return Array.prototype.join.call(this, ", ");
	},

	/**
	 * @param {string} value
	 */
	set mediaText(value) {
		var values = value.split(",");
		var length = this.length = values.length;
		for (var i=0; i<length; i++) {
			this[i] = values[i].trim();
		}
	},

	/**
	 * @param {string} medium
	 */
	appendMedium: function(medium) {
		if (Array.prototype.indexOf.call(this, medium) === -1) {
			this[this.length] = medium;
			this.length++;
		}
	},

	/**
	 * @param {string} medium
	 */
	deleteMedium: function(medium) {
		var index = Array.prototype.indexOf.call(this, medium);
		if (index !== -1) {
			Array.prototype.splice.call(this, index, 1);
		}
	}

};


//.CommonJS
MediaList.MediaList = CSSOM$a.MediaList;

var hasRequiredCSSImportRule;

function requireCSSImportRule () {
	if (hasRequiredCSSImportRule) return CSSImportRule;
	hasRequiredCSSImportRule = 1;
	//.CommonJS
	var CSSOM = {
		CSSRule: CSSRule.CSSRule,
		CSSStyleSheet: requireCSSStyleSheet().CSSStyleSheet,
		MediaList: MediaList.MediaList
	};
	///CommonJS


	/**
	 * @constructor
	 * @see http://dev.w3.org/csswg/cssom/#cssimportrule
	 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSImportRule
	 */
	CSSOM.CSSImportRule = function CSSImportRule() {
		CSSOM.CSSRule.call(this);
		this.href = "";
		this.media = new CSSOM.MediaList();
		this.styleSheet = new CSSOM.CSSStyleSheet();
	};

	CSSOM.CSSImportRule.prototype = new CSSOM.CSSRule();
	CSSOM.CSSImportRule.prototype.constructor = CSSOM.CSSImportRule;
	CSSOM.CSSImportRule.prototype.type = 3;

	Object.defineProperty(CSSOM.CSSImportRule.prototype, "cssText", {
	  get: function() {
	    var mediaText = this.media.mediaText;
	    return "@import url(" + this.href + ")" + (mediaText ? " " + mediaText : "") + ";";
	  },
	  set: function(cssText) {
	    var i = 0;

	    /**
	     * @import url(partial.css) screen, handheld;
	     *        ||               |
	     *        after-import     media
	     *         |
	     *         url
	     */
	    var state = '';

	    var buffer = '';
	    var index;
	    for (var character; (character = cssText.charAt(i)); i++) {

	      switch (character) {
	        case ' ':
	        case '\t':
	        case '\r':
	        case '\n':
	        case '\f':
	          if (state === 'after-import') {
	            state = 'url';
	          } else {
	            buffer += character;
	          }
	          break;

	        case '@':
	          if (!state && cssText.indexOf('@import', i) === i) {
	            state = 'after-import';
	            i += 'import'.length;
	            buffer = '';
	          }
	          break;

	        case 'u':
	          if (state === 'url' && cssText.indexOf('url(', i) === i) {
	            index = cssText.indexOf(')', i + 1);
	            if (index === -1) {
	              throw i + ': ")" not found';
	            }
	            i += 'url('.length;
	            var url = cssText.slice(i, index);
	            if (url[0] === url[url.length - 1]) {
	              if (url[0] === '"' || url[0] === "'") {
	                url = url.slice(1, -1);
	              }
	            }
	            this.href = url;
	            i = index;
	            state = 'media';
	          }
	          break;

	        case '"':
	          if (state === 'url') {
	            index = cssText.indexOf('"', i + 1);
	            if (!index) {
	              throw i + ": '\"' not found";
	            }
	            this.href = cssText.slice(i + 1, index);
	            i = index;
	            state = 'media';
	          }
	          break;

	        case "'":
	          if (state === 'url') {
	            index = cssText.indexOf("'", i + 1);
	            if (!index) {
	              throw i + ': "\'" not found';
	            }
	            this.href = cssText.slice(i + 1, index);
	            i = index;
	            state = 'media';
	          }
	          break;

	        case ';':
	          if (state === 'media') {
	            if (buffer) {
	              this.media.mediaText = buffer.trim();
	            }
	          }
	          break;

	        default:
	          if (state === 'media') {
	            buffer += character;
	          }
	          break;
	      }
	    }
	  }
	});


	//.CommonJS
	CSSImportRule.CSSImportRule = CSSOM.CSSImportRule;
	///CommonJS
	return CSSImportRule;
}

var CSSGroupingRule = {};

//.CommonJS
var CSSOM$9 = {
	CSSRule: CSSRule.CSSRule
};
///CommonJS


/**
 * @constructor
 * @see https://drafts.csswg.org/cssom/#the-cssgroupingrule-interface
 */
CSSOM$9.CSSGroupingRule = function CSSGroupingRule() {
	CSSOM$9.CSSRule.call(this);
	this.cssRules = [];
};

CSSOM$9.CSSGroupingRule.prototype = new CSSOM$9.CSSRule();
CSSOM$9.CSSGroupingRule.prototype.constructor = CSSOM$9.CSSGroupingRule;


/**
 * Used to insert a new CSS rule to a list of CSS rules.
 *
 * @example
 *   cssGroupingRule.cssText
 *   -> "body{margin:0;}"
 *   cssGroupingRule.insertRule("img{border:none;}", 1)
 *   -> 1
 *   cssGroupingRule.cssText
 *   -> "body{margin:0;}img{border:none;}"
 *
 * @param {string} rule
 * @param {number} [index]
 * @see https://www.w3.org/TR/cssom-1/#dom-cssgroupingrule-insertrule
 * @return {number} The index within the grouping rule's collection of the newly inserted rule.
 */
 CSSOM$9.CSSGroupingRule.prototype.insertRule = function insertRule(rule, index) {
	if (index < 0 || index > this.cssRules.length) {
		throw new RangeError("INDEX_SIZE_ERR");
	}
	var cssRule = CSSOM$9.parse(rule).cssRules[0];
	cssRule.parentRule = this;
	this.cssRules.splice(index, 0, cssRule);
	return index;
};

/**
 * Used to delete a rule from the grouping rule.
 *
 *   cssGroupingRule.cssText
 *   -> "img{border:none;}body{margin:0;}"
 *   cssGroupingRule.deleteRule(0)
 *   cssGroupingRule.cssText
 *   -> "body{margin:0;}"
 *
 * @param {number} index within the grouping rule's rule list of the rule to remove.
 * @see https://www.w3.org/TR/cssom-1/#dom-cssgroupingrule-deleterule
 */
 CSSOM$9.CSSGroupingRule.prototype.deleteRule = function deleteRule(index) {
	if (index < 0 || index >= this.cssRules.length) {
		throw new RangeError("INDEX_SIZE_ERR");
	}
	this.cssRules.splice(index, 1)[0].parentRule = null;
};

//.CommonJS
CSSGroupingRule.CSSGroupingRule = CSSOM$9.CSSGroupingRule;

var CSSMediaRule = {};

var CSSConditionRule = {};

//.CommonJS
var CSSOM$8 = {
  CSSRule: CSSRule.CSSRule,
  CSSGroupingRule: CSSGroupingRule.CSSGroupingRule
};
///CommonJS


/**
 * @constructor
 * @see https://www.w3.org/TR/css-conditional-3/#the-cssconditionrule-interface
 */
CSSOM$8.CSSConditionRule = function CSSConditionRule() {
  CSSOM$8.CSSGroupingRule.call(this);
  this.cssRules = [];
};

CSSOM$8.CSSConditionRule.prototype = new CSSOM$8.CSSGroupingRule();
CSSOM$8.CSSConditionRule.prototype.constructor = CSSOM$8.CSSConditionRule;
CSSOM$8.CSSConditionRule.prototype.conditionText = '';
CSSOM$8.CSSConditionRule.prototype.cssText = '';

//.CommonJS
CSSConditionRule.CSSConditionRule = CSSOM$8.CSSConditionRule;

//.CommonJS
var CSSOM$7 = {
	CSSRule: CSSRule.CSSRule,
	CSSGroupingRule: CSSGroupingRule.CSSGroupingRule,
	CSSConditionRule: CSSConditionRule.CSSConditionRule,
	MediaList: MediaList.MediaList
};
///CommonJS


/**
 * @constructor
 * @see http://dev.w3.org/csswg/cssom/#cssmediarule
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSMediaRule
 */
CSSOM$7.CSSMediaRule = function CSSMediaRule() {
	CSSOM$7.CSSConditionRule.call(this);
	this.media = new CSSOM$7.MediaList();
};

CSSOM$7.CSSMediaRule.prototype = new CSSOM$7.CSSConditionRule();
CSSOM$7.CSSMediaRule.prototype.constructor = CSSOM$7.CSSMediaRule;
CSSOM$7.CSSMediaRule.prototype.type = 4;

// https://opensource.apple.com/source/WebCore/WebCore-7611.1.21.161.3/css/CSSMediaRule.cpp
Object.defineProperties(CSSOM$7.CSSMediaRule.prototype, {
  "conditionText": {
    get: function() {
      return this.media.mediaText;
    },
    set: function(value) {
      this.media.mediaText = value;
    },
    configurable: true,
    enumerable: true
  },
  "cssText": {
    get: function() {
      var cssTexts = [];
      for (var i=0, length=this.cssRules.length; i < length; i++) {
        cssTexts.push(this.cssRules[i].cssText);
      }
      return "@media " + this.media.mediaText + " {" + cssTexts.join("") + "}";
    },
    configurable: true,
    enumerable: true
  }
});


//.CommonJS
CSSMediaRule.CSSMediaRule = CSSOM$7.CSSMediaRule;

var CSSSupportsRule = {};

//.CommonJS
var CSSOM$6 = {
  CSSRule: CSSRule.CSSRule,
  CSSGroupingRule: CSSGroupingRule.CSSGroupingRule,
  CSSConditionRule: CSSConditionRule.CSSConditionRule
};
///CommonJS


/**
 * @constructor
 * @see https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface
 */
CSSOM$6.CSSSupportsRule = function CSSSupportsRule() {
  CSSOM$6.CSSConditionRule.call(this);
};

CSSOM$6.CSSSupportsRule.prototype = new CSSOM$6.CSSConditionRule();
CSSOM$6.CSSSupportsRule.prototype.constructor = CSSOM$6.CSSSupportsRule;
CSSOM$6.CSSSupportsRule.prototype.type = 12;

Object.defineProperty(CSSOM$6.CSSSupportsRule.prototype, "cssText", {
  get: function() {
    var cssTexts = [];

    for (var i = 0, length = this.cssRules.length; i < length; i++) {
      cssTexts.push(this.cssRules[i].cssText);
    }

    return "@supports " + this.conditionText + " {" + cssTexts.join("") + "}";
  }
});

//.CommonJS
CSSSupportsRule.CSSSupportsRule = CSSOM$6.CSSSupportsRule;

var CSSFontFaceRule = {};

var hasRequiredCSSFontFaceRule;

function requireCSSFontFaceRule () {
	if (hasRequiredCSSFontFaceRule) return CSSFontFaceRule;
	hasRequiredCSSFontFaceRule = 1;
	//.CommonJS
	var CSSOM = {
		CSSStyleDeclaration: requireCSSStyleDeclaration().CSSStyleDeclaration,
		CSSRule: CSSRule.CSSRule
	};
	///CommonJS


	/**
	 * @constructor
	 * @see http://dev.w3.org/csswg/cssom/#css-font-face-rule
	 */
	CSSOM.CSSFontFaceRule = function CSSFontFaceRule() {
		CSSOM.CSSRule.call(this);
		this.style = new CSSOM.CSSStyleDeclaration();
		this.style.parentRule = this;
	};

	CSSOM.CSSFontFaceRule.prototype = new CSSOM.CSSRule();
	CSSOM.CSSFontFaceRule.prototype.constructor = CSSOM.CSSFontFaceRule;
	CSSOM.CSSFontFaceRule.prototype.type = 5;
	//FIXME
	//CSSOM.CSSFontFaceRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
	//CSSOM.CSSFontFaceRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;

	// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSFontFaceRule.cpp
	Object.defineProperty(CSSOM.CSSFontFaceRule.prototype, "cssText", {
	  get: function() {
	    return "@font-face {" + this.style.cssText + "}";
	  }
	});


	//.CommonJS
	CSSFontFaceRule.CSSFontFaceRule = CSSOM.CSSFontFaceRule;
	///CommonJS
	return CSSFontFaceRule;
}

var CSSHostRule = {};

//.CommonJS
var CSSOM$5 = {
	CSSRule: CSSRule.CSSRule
};
///CommonJS


/**
 * @constructor
 * @see http://www.w3.org/TR/shadow-dom/#host-at-rule
 */
CSSOM$5.CSSHostRule = function CSSHostRule() {
	CSSOM$5.CSSRule.call(this);
	this.cssRules = [];
};

CSSOM$5.CSSHostRule.prototype = new CSSOM$5.CSSRule();
CSSOM$5.CSSHostRule.prototype.constructor = CSSOM$5.CSSHostRule;
CSSOM$5.CSSHostRule.prototype.type = 1001;
//FIXME
//CSSOM.CSSHostRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSHostRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;

Object.defineProperty(CSSOM$5.CSSHostRule.prototype, "cssText", {
	get: function() {
		var cssTexts = [];
		for (var i=0, length=this.cssRules.length; i < length; i++) {
			cssTexts.push(this.cssRules[i].cssText);
		}
		return "@host {" + cssTexts.join("") + "}";
	}
});


//.CommonJS
CSSHostRule.CSSHostRule = CSSOM$5.CSSHostRule;

var CSSKeyframeRule = {};

var hasRequiredCSSKeyframeRule;

function requireCSSKeyframeRule () {
	if (hasRequiredCSSKeyframeRule) return CSSKeyframeRule;
	hasRequiredCSSKeyframeRule = 1;
	//.CommonJS
	var CSSOM = {
		CSSRule: CSSRule.CSSRule,
		CSSStyleDeclaration: requireCSSStyleDeclaration().CSSStyleDeclaration
	};
	///CommonJS


	/**
	 * @constructor
	 * @see http://www.w3.org/TR/css3-animations/#DOM-CSSKeyframeRule
	 */
	CSSOM.CSSKeyframeRule = function CSSKeyframeRule() {
		CSSOM.CSSRule.call(this);
		this.keyText = '';
		this.style = new CSSOM.CSSStyleDeclaration();
		this.style.parentRule = this;
	};

	CSSOM.CSSKeyframeRule.prototype = new CSSOM.CSSRule();
	CSSOM.CSSKeyframeRule.prototype.constructor = CSSOM.CSSKeyframeRule;
	CSSOM.CSSKeyframeRule.prototype.type = 8;
	//FIXME
	//CSSOM.CSSKeyframeRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
	//CSSOM.CSSKeyframeRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;

	// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSKeyframeRule.cpp
	Object.defineProperty(CSSOM.CSSKeyframeRule.prototype, "cssText", {
	  get: function() {
	    return this.keyText + " {" + this.style.cssText + "} ";
	  }
	});


	//.CommonJS
	CSSKeyframeRule.CSSKeyframeRule = CSSOM.CSSKeyframeRule;
	///CommonJS
	return CSSKeyframeRule;
}

var CSSKeyframesRule = {};

//.CommonJS
var CSSOM$4 = {
	CSSRule: CSSRule.CSSRule
};
///CommonJS


/**
 * @constructor
 * @see http://www.w3.org/TR/css3-animations/#DOM-CSSKeyframesRule
 */
CSSOM$4.CSSKeyframesRule = function CSSKeyframesRule() {
	CSSOM$4.CSSRule.call(this);
	this.name = '';
	this.cssRules = [];
};

CSSOM$4.CSSKeyframesRule.prototype = new CSSOM$4.CSSRule();
CSSOM$4.CSSKeyframesRule.prototype.constructor = CSSOM$4.CSSKeyframesRule;
CSSOM$4.CSSKeyframesRule.prototype.type = 7;
//FIXME
//CSSOM.CSSKeyframesRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSKeyframesRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;

// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSKeyframesRule.cpp
Object.defineProperty(CSSOM$4.CSSKeyframesRule.prototype, "cssText", {
  get: function() {
    var cssTexts = [];
    for (var i=0, length=this.cssRules.length; i < length; i++) {
      cssTexts.push("  " + this.cssRules[i].cssText);
    }
    return "@" + (this._vendorPrefix || '') + "keyframes " + this.name + " { \n" + cssTexts.join("\n") + "\n}";
  }
});


//.CommonJS
CSSKeyframesRule.CSSKeyframesRule = CSSOM$4.CSSKeyframesRule;

var CSSValueExpression = {};

var CSSValue = {};

//.CommonJS
var CSSOM$3 = {};
///CommonJS


/**
 * @constructor
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSValue
 *
 * TODO: add if needed
 */
CSSOM$3.CSSValue = function CSSValue() {
};

CSSOM$3.CSSValue.prototype = {
	constructor: CSSOM$3.CSSValue,

	// @see: http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSValue
	set cssText(text) {
		var name = this._getConstructorName();

		throw new Error('DOMException: property "cssText" of "' + name + '" is readonly and can not be replaced with "' + text + '"!');
	},

	get cssText() {
		var name = this._getConstructorName();

		throw new Error('getter "cssText" of "' + name + '" is not implemented!');
	},

	_getConstructorName: function() {
		var s = this.constructor.toString(),
				c = s.match(/function\s([^\(]+)/),
				name = c[1];

		return name;
	}
};


//.CommonJS
CSSValue.CSSValue = CSSOM$3.CSSValue;

//.CommonJS
var CSSOM$2 = {
	CSSValue: CSSValue.CSSValue
};
///CommonJS


/**
 * @constructor
 * @see http://msdn.microsoft.com/en-us/library/ms537634(v=vs.85).aspx
 *
 */
CSSOM$2.CSSValueExpression = function CSSValueExpression(token, idx) {
	this._token = token;
	this._idx = idx;
};

CSSOM$2.CSSValueExpression.prototype = new CSSOM$2.CSSValue();
CSSOM$2.CSSValueExpression.prototype.constructor = CSSOM$2.CSSValueExpression;

/**
 * parse css expression() value
 *
 * @return {Object}
 *         - error:
 *         or
 *         - idx:
 *         - expression:
 *
 * Example:
 *
 * .selector {
 *		zoom: expression(documentElement.clientWidth > 1000 ? '1000px' : 'auto');
 * }
 */
CSSOM$2.CSSValueExpression.prototype.parse = function() {
	var token = this._token,
			idx = this._idx;

	var character = '',
			expression = '',
			error = '',
			info,
			paren = [];


	for (; ; ++idx) {
		character = token.charAt(idx);

		// end of token
		if (character === '') {
			error = 'css expression error: unfinished expression!';
			break;
		}

		switch(character) {
			case '(':
				paren.push(character);
				expression += character;
				break;

			case ')':
				paren.pop(character);
				expression += character;
				break;

			case '/':
				if ((info = this._parseJSComment(token, idx))) { // comment?
					if (info.error) {
						error = 'css expression error: unfinished comment in expression!';
					} else {
						idx = info.idx;
						// ignore the comment
					}
				} else if ((info = this._parseJSRexExp(token, idx))) { // regexp
					idx = info.idx;
					expression += info.text;
				} else { // other
					expression += character;
				}
				break;

			case "'":
			case '"':
				info = this._parseJSString(token, idx, character);
				if (info) { // string
					idx = info.idx;
					expression += info.text;
				} else {
					expression += character;
				}
				break;

			default:
				expression += character;
				break;
		}

		if (error) {
			break;
		}

		// end of expression
		if (paren.length === 0) {
			break;
		}
	}

	var ret;
	if (error) {
		ret = {
			error: error
		};
	} else {
		ret = {
			idx: idx,
			expression: expression
		};
	}

	return ret;
};


/**
 *
 * @return {Object|false}
 *          - idx:
 *          - text:
 *          or
 *          - error:
 *          or
 *          false
 *
 */
CSSOM$2.CSSValueExpression.prototype._parseJSComment = function(token, idx) {
	var nextChar = token.charAt(idx + 1),
			text;

	if (nextChar === '/' || nextChar === '*') {
		var startIdx = idx,
				endIdx,
				commentEndChar;

		if (nextChar === '/') { // line comment
			commentEndChar = '\n';
		} else if (nextChar === '*') { // block comment
			commentEndChar = '*/';
		}

		endIdx = token.indexOf(commentEndChar, startIdx + 1 + 1);
		if (endIdx !== -1) {
			endIdx = endIdx + commentEndChar.length - 1;
			text = token.substring(idx, endIdx + 1);
			return {
				idx: endIdx,
				text: text
			};
		} else {
			var error = 'css expression error: unfinished comment in expression!';
			return {
				error: error
			};
		}
	} else {
		return false;
	}
};


/**
 *
 * @return {Object|false}
 *					- idx:
 *					- text:
 *					or 
 *					false
 *
 */
CSSOM$2.CSSValueExpression.prototype._parseJSString = function(token, idx, sep) {
	var endIdx = this._findMatchedIdx(token, idx, sep),
			text;

	if (endIdx === -1) {
		return false;
	} else {
		text = token.substring(idx, endIdx + sep.length);

		return {
			idx: endIdx,
			text: text
		};
	}
};


/**
 * parse regexp in css expression
 *
 * @return {Object|false}
 *				- idx:
 *				- regExp:
 *				or 
 *				false
 */

/*

all legal RegExp
 
/a/
(/a/)
[/a/]
[12, /a/]

!/a/

+/a/
-/a/
* /a/
/ /a/
%/a/

===/a/
!==/a/
==/a/
!=/a/
>/a/
>=/a/
</a/
<=/a/

&/a/
|/a/
^/a/
~/a/
<</a/
>>/a/
>>>/a/

&&/a/
||/a/
?/a/
=/a/
,/a/

		delete /a/
				in /a/
instanceof /a/
				new /a/
		typeof /a/
			void /a/

*/
CSSOM$2.CSSValueExpression.prototype._parseJSRexExp = function(token, idx) {
	var before = token.substring(0, idx).replace(/\s+$/, ""),
			legalRegx = [
				/^$/,
				/\($/,
				/\[$/,
				/\!$/,
				/\+$/,
				/\-$/,
				/\*$/,
				/\/\s+/,
				/\%$/,
				/\=$/,
				/\>$/,
				/<$/,
				/\&$/,
				/\|$/,
				/\^$/,
				/\~$/,
				/\?$/,
				/\,$/,
				/delete$/,
				/in$/,
				/instanceof$/,
				/new$/,
				/typeof$/,
				/void$/
			];

	var isLegal = legalRegx.some(function(reg) {
		return reg.test(before);
	});

	if (!isLegal) {
		return false;
	} else {
		var sep = '/';

		// same logic as string
		return this._parseJSString(token, idx, sep);
	}
};


/**
 *
 * find next sep(same line) index in `token`
 *
 * @return {Number}
 *
 */
CSSOM$2.CSSValueExpression.prototype._findMatchedIdx = function(token, idx, sep) {
	var startIdx = idx,
			endIdx;

	var NOT_FOUND = -1;

	while(true) {
		endIdx = token.indexOf(sep, startIdx + 1);

		if (endIdx === -1) { // not found
			endIdx = NOT_FOUND;
			break;
		} else {
			var text = token.substring(idx + 1, endIdx),
					matched = text.match(/\\+$/);
			if (!matched || matched[0] % 2 === 0) { // not escaped
				break;
			} else {
				startIdx = endIdx;
			}
		}
	}

	// boundary must be in the same line(js sting or regexp)
	var nextNewLineIdx = token.indexOf('\n', idx + 1);
	if (nextNewLineIdx < endIdx) {
		endIdx = NOT_FOUND;
	}


	return endIdx;
};




//.CommonJS
CSSValueExpression.CSSValueExpression = CSSOM$2.CSSValueExpression;

var CSSDocumentRule = {};

var MatcherList = {};

//.CommonJS
var CSSOM$1 = {};
///CommonJS


/**
 * @constructor
 * @see https://developer.mozilla.org/en/CSS/@-moz-document
 */
CSSOM$1.MatcherList = function MatcherList(){
    this.length = 0;
};

CSSOM$1.MatcherList.prototype = {

    constructor: CSSOM$1.MatcherList,

    /**
     * @return {string}
     */
    get matcherText() {
        return Array.prototype.join.call(this, ", ");
    },

    /**
     * @param {string} value
     */
    set matcherText(value) {
        // just a temporary solution, actually it may be wrong by just split the value with ',', because a url can include ','.
        var values = value.split(",");
        var length = this.length = values.length;
        for (var i=0; i<length; i++) {
            this[i] = values[i].trim();
        }
    },

    /**
     * @param {string} matcher
     */
    appendMatcher: function(matcher) {
        if (Array.prototype.indexOf.call(this, matcher) === -1) {
            this[this.length] = matcher;
            this.length++;
        }
    },

    /**
     * @param {string} matcher
     */
    deleteMatcher: function(matcher) {
        var index = Array.prototype.indexOf.call(this, matcher);
        if (index !== -1) {
            Array.prototype.splice.call(this, index, 1);
        }
    }

};


//.CommonJS
MatcherList.MatcherList = CSSOM$1.MatcherList;

//.CommonJS
var CSSOM = {
    CSSRule: CSSRule.CSSRule,
    MatcherList: MatcherList.MatcherList
};
///CommonJS


/**
 * @constructor
 * @see https://developer.mozilla.org/en/CSS/@-moz-document
 */
CSSOM.CSSDocumentRule = function CSSDocumentRule() {
    CSSOM.CSSRule.call(this);
    this.matcher = new CSSOM.MatcherList();
    this.cssRules = [];
};

CSSOM.CSSDocumentRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSDocumentRule.prototype.constructor = CSSOM.CSSDocumentRule;
CSSOM.CSSDocumentRule.prototype.type = 10;
//FIXME
//CSSOM.CSSDocumentRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSDocumentRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;

Object.defineProperty(CSSOM.CSSDocumentRule.prototype, "cssText", {
  get: function() {
    var cssTexts = [];
    for (var i=0, length=this.cssRules.length; i < length; i++) {
        cssTexts.push(this.cssRules[i].cssText);
    }
    return "@-moz-document " + this.matcher.matcherText + " {" + cssTexts.join("") + "}";
  }
});


//.CommonJS
CSSDocumentRule.CSSDocumentRule = CSSOM.CSSDocumentRule;

var hasRequiredParse;

function requireParse () {
	if (hasRequiredParse) return parse$2;
	hasRequiredParse = 1;
	//.CommonJS
	var CSSOM = {};
	///CommonJS


	/**
	 * @param {string} token
	 */
	CSSOM.parse = function parse(token) {

		var i = 0;

		/**
			"before-selector" or
			"selector" or
			"atRule" or
			"atBlock" or
			"conditionBlock" or
			"before-name" or
			"name" or
			"before-value" or
			"value"
		*/
		var state = "before-selector";

		var index;
		var buffer = "";
		var valueParenthesisDepth = 0;

		var SIGNIFICANT_WHITESPACE = {
			"selector": true,
			"value": true,
			"value-parenthesis": true,
			"atRule": true,
			"importRule-begin": true,
			"importRule": true,
			"atBlock": true,
			"conditionBlock": true,
			'documentRule-begin': true
		};

		var styleSheet = new CSSOM.CSSStyleSheet();

		// @type CSSStyleSheet|CSSMediaRule|CSSSupportsRule|CSSFontFaceRule|CSSKeyframesRule|CSSDocumentRule
		var currentScope = styleSheet;

		// @type CSSMediaRule|CSSSupportsRule|CSSKeyframesRule|CSSDocumentRule
		var parentRule;

		var ancestorRules = [];
		var hasAncestors = false;
		var prevScope;

		var name, priority="", styleRule, mediaRule, supportsRule, importRule, fontFaceRule, keyframesRule, documentRule, hostRule;

		var atKeyframesRegExp = /@(-(?:\w+-)+)?keyframes/g;

		var parseError = function(message) {
			var lines = token.substring(0, i).split('\n');
			var lineCount = lines.length;
			var charCount = lines.pop().length + 1;
			var error = new Error(message + ' (line ' + lineCount + ', char ' + charCount + ')');
			error.line = lineCount;
			/* jshint sub : true */
			error['char'] = charCount;
			error.styleSheet = styleSheet;
			throw error;
		};

		for (var character; (character = token.charAt(i)); i++) {

			switch (character) {

			case " ":
			case "\t":
			case "\r":
			case "\n":
			case "\f":
				if (SIGNIFICANT_WHITESPACE[state]) {
					buffer += character;
				}
				break;

			// String
			case '"':
				index = i + 1;
				do {
					index = token.indexOf('"', index) + 1;
					if (!index) {
						parseError('Unmatched "');
					}
				} while (token[index - 2] === '\\');
				buffer += token.slice(i, index);
				i = index - 1;
				switch (state) {
					case 'before-value':
						state = 'value';
						break;
					case 'importRule-begin':
						state = 'importRule';
						break;
				}
				break;

			case "'":
				index = i + 1;
				do {
					index = token.indexOf("'", index) + 1;
					if (!index) {
						parseError("Unmatched '");
					}
				} while (token[index - 2] === '\\');
				buffer += token.slice(i, index);
				i = index - 1;
				switch (state) {
					case 'before-value':
						state = 'value';
						break;
					case 'importRule-begin':
						state = 'importRule';
						break;
				}
				break;

			// Comment
			case "/":
				if (token.charAt(i + 1) === "*") {
					i += 2;
					index = token.indexOf("*/", i);
					if (index === -1) {
						parseError("Missing */");
					} else {
						i = index + 1;
					}
				} else {
					buffer += character;
				}
				if (state === "importRule-begin") {
					buffer += " ";
					state = "importRule";
				}
				break;

			// At-rule
			case "@":
				if (token.indexOf("@-moz-document", i) === i) {
					state = "documentRule-begin";
					documentRule = new CSSOM.CSSDocumentRule();
					documentRule.__starts = i;
					i += "-moz-document".length;
					buffer = "";
					break;
				} else if (token.indexOf("@media", i) === i) {
					state = "atBlock";
					mediaRule = new CSSOM.CSSMediaRule();
					mediaRule.__starts = i;
					i += "media".length;
					buffer = "";
					break;
				} else if (token.indexOf("@supports", i) === i) {
					state = "conditionBlock";
					supportsRule = new CSSOM.CSSSupportsRule();
					supportsRule.__starts = i;
					i += "supports".length;
					buffer = "";
					break;
				} else if (token.indexOf("@host", i) === i) {
					state = "hostRule-begin";
					i += "host".length;
					hostRule = new CSSOM.CSSHostRule();
					hostRule.__starts = i;
					buffer = "";
					break;
				} else if (token.indexOf("@import", i) === i) {
					state = "importRule-begin";
					i += "import".length;
					buffer += "@import";
					break;
				} else if (token.indexOf("@font-face", i) === i) {
					state = "fontFaceRule-begin";
					i += "font-face".length;
					fontFaceRule = new CSSOM.CSSFontFaceRule();
					fontFaceRule.__starts = i;
					buffer = "";
					break;
				} else {
					atKeyframesRegExp.lastIndex = i;
					var matchKeyframes = atKeyframesRegExp.exec(token);
					if (matchKeyframes && matchKeyframes.index === i) {
						state = "keyframesRule-begin";
						keyframesRule = new CSSOM.CSSKeyframesRule();
						keyframesRule.__starts = i;
						keyframesRule._vendorPrefix = matchKeyframes[1]; // Will come out as undefined if no prefix was found
						i += matchKeyframes[0].length - 1;
						buffer = "";
						break;
					} else if (state === "selector") {
						state = "atRule";
					}
				}
				buffer += character;
				break;

			case "{":
				if (state === "selector" || state === "atRule") {
					styleRule.selectorText = buffer.trim();
					styleRule.style.__starts = i;
					buffer = "";
					state = "before-name";
				} else if (state === "atBlock") {
					mediaRule.media.mediaText = buffer.trim();

					if (parentRule) {
						ancestorRules.push(parentRule);
					}

					currentScope = parentRule = mediaRule;
					mediaRule.parentStyleSheet = styleSheet;
					buffer = "";
					state = "before-selector";
				} else if (state === "conditionBlock") {
					supportsRule.conditionText = buffer.trim();

					if (parentRule) {
						ancestorRules.push(parentRule);
					}

					currentScope = parentRule = supportsRule;
					supportsRule.parentStyleSheet = styleSheet;
					buffer = "";
					state = "before-selector";
				} else if (state === "hostRule-begin") {
					if (parentRule) {
						ancestorRules.push(parentRule);
					}

					currentScope = parentRule = hostRule;
					hostRule.parentStyleSheet = styleSheet;
					buffer = "";
					state = "before-selector";
				} else if (state === "fontFaceRule-begin") {
					if (parentRule) {
						fontFaceRule.parentRule = parentRule;
					}
					fontFaceRule.parentStyleSheet = styleSheet;
					styleRule = fontFaceRule;
					buffer = "";
					state = "before-name";
				} else if (state === "keyframesRule-begin") {
					keyframesRule.name = buffer.trim();
					if (parentRule) {
						ancestorRules.push(parentRule);
						keyframesRule.parentRule = parentRule;
					}
					keyframesRule.parentStyleSheet = styleSheet;
					currentScope = parentRule = keyframesRule;
					buffer = "";
					state = "keyframeRule-begin";
				} else if (state === "keyframeRule-begin") {
					styleRule = new CSSOM.CSSKeyframeRule();
					styleRule.keyText = buffer.trim();
					styleRule.__starts = i;
					buffer = "";
					state = "before-name";
				} else if (state === "documentRule-begin") {
					// FIXME: what if this '{' is in the url text of the match function?
					documentRule.matcher.matcherText = buffer.trim();
					if (parentRule) {
						ancestorRules.push(parentRule);
						documentRule.parentRule = parentRule;
					}
					currentScope = parentRule = documentRule;
					documentRule.parentStyleSheet = styleSheet;
					buffer = "";
					state = "before-selector";
				}
				break;

			case ":":
				if (state === "name") {
					name = buffer.trim();
					buffer = "";
					state = "before-value";
				} else {
					buffer += character;
				}
				break;

			case "(":
				if (state === 'value') {
					// ie css expression mode
					if (buffer.trim() === 'expression') {
						var info = (new CSSOM.CSSValueExpression(token, i)).parse();

						if (info.error) {
							parseError(info.error);
						} else {
							buffer += info.expression;
							i = info.idx;
						}
					} else {
						state = 'value-parenthesis';
						//always ensure this is reset to 1 on transition
						//from value to value-parenthesis
						valueParenthesisDepth = 1;
						buffer += character;
					}
				} else if (state === 'value-parenthesis') {
					valueParenthesisDepth++;
					buffer += character;
				} else {
					buffer += character;
				}
				break;

			case ")":
				if (state === 'value-parenthesis') {
					valueParenthesisDepth--;
					if (valueParenthesisDepth === 0) state = 'value';
				}
				buffer += character;
				break;

			case "!":
				if (state === "value" && token.indexOf("!important", i) === i) {
					priority = "important";
					i += "important".length;
				} else {
					buffer += character;
				}
				break;

			case ";":
				switch (state) {
					case "value":
						styleRule.style.setProperty(name, buffer.trim(), priority);
						priority = "";
						buffer = "";
						state = "before-name";
						break;
					case "atRule":
						buffer = "";
						state = "before-selector";
						break;
					case "importRule":
						importRule = new CSSOM.CSSImportRule();
						importRule.parentStyleSheet = importRule.styleSheet.parentStyleSheet = styleSheet;
						importRule.cssText = buffer + character;
						styleSheet.cssRules.push(importRule);
						buffer = "";
						state = "before-selector";
						break;
					default:
						buffer += character;
						break;
				}
				break;

			case "}":
				switch (state) {
					case "value":
						styleRule.style.setProperty(name, buffer.trim(), priority);
						priority = "";
						/* falls through */
					case "before-name":
					case "name":
						styleRule.__ends = i + 1;
						if (parentRule) {
							styleRule.parentRule = parentRule;
						}
						styleRule.parentStyleSheet = styleSheet;
						currentScope.cssRules.push(styleRule);
						buffer = "";
						if (currentScope.constructor === CSSOM.CSSKeyframesRule) {
							state = "keyframeRule-begin";
						} else {
							state = "before-selector";
						}
						break;
					case "keyframeRule-begin":
					case "before-selector":
					case "selector":
						// End of media/supports/document rule.
						if (!parentRule) {
							parseError("Unexpected }");
						}

						// Handle rules nested in @media or @supports
						hasAncestors = ancestorRules.length > 0;

						while (ancestorRules.length > 0) {
							parentRule = ancestorRules.pop();

							if (
								parentRule.constructor.name === "CSSMediaRule"
								|| parentRule.constructor.name === "CSSSupportsRule"
							) {
								prevScope = currentScope;
								currentScope = parentRule;
								currentScope.cssRules.push(prevScope);
								break;
							}

							if (ancestorRules.length === 0) {
								hasAncestors = false;
							}
						}
						
						if (!hasAncestors) {
							currentScope.__ends = i + 1;
							styleSheet.cssRules.push(currentScope);
							currentScope = styleSheet;
							parentRule = null;
						}

						buffer = "";
						state = "before-selector";
						break;
				}
				break;

			default:
				switch (state) {
					case "before-selector":
						state = "selector";
						styleRule = new CSSOM.CSSStyleRule();
						styleRule.__starts = i;
						break;
					case "before-name":
						state = "name";
						break;
					case "before-value":
						state = "value";
						break;
					case "importRule-begin":
						state = "importRule";
						break;
				}
				buffer += character;
				break;
			}
		}

		return styleSheet;
	};


	//.CommonJS
	parse$2.parse = CSSOM.parse;
	// The following modules cannot be included sooner due to the mutual dependency with parse.js
	CSSOM.CSSStyleSheet = requireCSSStyleSheet().CSSStyleSheet;
	CSSOM.CSSStyleRule = requireCSSStyleRule().CSSStyleRule;
	CSSOM.CSSImportRule = requireCSSImportRule().CSSImportRule;
	CSSOM.CSSGroupingRule = CSSGroupingRule.CSSGroupingRule;
	CSSOM.CSSMediaRule = CSSMediaRule.CSSMediaRule;
	CSSOM.CSSConditionRule = CSSConditionRule.CSSConditionRule;
	CSSOM.CSSSupportsRule = CSSSupportsRule.CSSSupportsRule;
	CSSOM.CSSFontFaceRule = requireCSSFontFaceRule().CSSFontFaceRule;
	CSSOM.CSSHostRule = CSSHostRule.CSSHostRule;
	CSSOM.CSSStyleDeclaration = requireCSSStyleDeclaration().CSSStyleDeclaration;
	CSSOM.CSSKeyframeRule = requireCSSKeyframeRule().CSSKeyframeRule;
	CSSOM.CSSKeyframesRule = CSSKeyframesRule.CSSKeyframesRule;
	CSSOM.CSSValueExpression = CSSValueExpression.CSSValueExpression;
	CSSOM.CSSDocumentRule = CSSDocumentRule.CSSDocumentRule;
	///CommonJS
	return parse$2;
}

var hasRequiredCSSStyleDeclaration;

function requireCSSStyleDeclaration () {
	if (hasRequiredCSSStyleDeclaration) return CSSStyleDeclaration;
	hasRequiredCSSStyleDeclaration = 1;
	//.CommonJS
	var CSSOM = {};
	///CommonJS


	/**
	 * @constructor
	 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration
	 */
	CSSOM.CSSStyleDeclaration = function CSSStyleDeclaration(){
		this.length = 0;
		this.parentRule = null;

		// NON-STANDARD
		this._importants = {};
	};


	CSSOM.CSSStyleDeclaration.prototype = {

		constructor: CSSOM.CSSStyleDeclaration,

		/**
		 *
		 * @param {string} name
		 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration-getPropertyValue
		 * @return {string} the value of the property if it has been explicitly set for this declaration block.
		 * Returns the empty string if the property has not been set.
		 */
		getPropertyValue: function(name) {
			return this[name] || "";
		},

		/**
		 *
		 * @param {string} name
		 * @param {string} value
		 * @param {string} [priority=null] "important" or null
		 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration-setProperty
		 */
		setProperty: function(name, value, priority) {
			if (this[name]) {
				// Property already exist. Overwrite it.
				var index = Array.prototype.indexOf.call(this, name);
				if (index < 0) {
					this[this.length] = name;
					this.length++;
				}
			} else {
				// New property.
				this[this.length] = name;
				this.length++;
			}
			this[name] = value + "";
			this._importants[name] = priority;
		},

		/**
		 *
		 * @param {string} name
		 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration-removeProperty
		 * @return {string} the value of the property if it has been explicitly set for this declaration block.
		 * Returns the empty string if the property has not been set or the property name does not correspond to a known CSS property.
		 */
		removeProperty: function(name) {
			if (!(name in this)) {
				return "";
			}
			var index = Array.prototype.indexOf.call(this, name);
			if (index < 0) {
				return "";
			}
			var prevValue = this[name];
			this[name] = "";

			// That's what WebKit and Opera do
			Array.prototype.splice.call(this, index, 1);

			// That's what Firefox does
			//this[index] = ""

			return prevValue;
		},

		getPropertyCSSValue: function() {
			//FIXME
		},

		/**
		 *
		 * @param {String} name
		 */
		getPropertyPriority: function(name) {
			return this._importants[name] || "";
		},


		/**
		 *   element.style.overflow = "auto"
		 *   element.style.getPropertyShorthand("overflow-x")
		 *   -> "overflow"
		 */
		getPropertyShorthand: function() {
			//FIXME
		},

		isPropertyImplicit: function() {
			//FIXME
		},

		// Doesn't work in IE < 9
		get cssText(){
			var properties = [];
			for (var i=0, length=this.length; i < length; ++i) {
				var name = this[i];
				var value = this.getPropertyValue(name);
				var priority = this.getPropertyPriority(name);
				if (priority) {
					priority = " !" + priority;
				}
				properties[i] = name + ": " + value + priority + ";";
			}
			return properties.join(" ");
		},

		set cssText(text){
			var i, name;
			for (i = this.length; i--;) {
				name = this[i];
				this[name] = "";
			}
			Array.prototype.splice.call(this, 0, this.length);
			this._importants = {};

			var dummyRule = CSSOM.parse('#bogus{' + text + '}').cssRules[0].style;
			var length = dummyRule.length;
			for (i = 0; i < length; ++i) {
				name = dummyRule[i];
				this.setProperty(dummyRule[i], dummyRule.getPropertyValue(name), dummyRule.getPropertyPriority(name));
			}
		}
	};


	//.CommonJS
	CSSStyleDeclaration.CSSStyleDeclaration = CSSOM.CSSStyleDeclaration;
	CSSOM.parse = requireParse().parse; // Cannot be included sooner due to the mutual dependency between parse.js and CSSStyleDeclaration.js
	///CommonJS
	return CSSStyleDeclaration;
}

//.CommonJS
({
	CSSStyleSheet: requireCSSStyleSheet().CSSStyleSheet,
	CSSRule: CSSRule.CSSRule,
	CSSStyleRule: requireCSSStyleRule().CSSStyleRule,
	CSSGroupingRule: CSSGroupingRule.CSSGroupingRule,
	CSSConditionRule: CSSConditionRule.CSSConditionRule,
	CSSMediaRule: CSSMediaRule.CSSMediaRule,
	CSSSupportsRule: CSSSupportsRule.CSSSupportsRule,
	CSSStyleDeclaration: requireCSSStyleDeclaration().CSSStyleDeclaration,
	CSSKeyframeRule: requireCSSKeyframeRule().CSSKeyframeRule,
	CSSKeyframesRule: CSSKeyframesRule.CSSKeyframesRule
});

requireCSSStyleDeclaration().CSSStyleDeclaration;
requireCSSStyleRule().CSSStyleRule;
requireCSSImportRule().CSSImportRule;
requireCSSFontFaceRule().CSSFontFaceRule;
requireCSSStyleSheet().CSSStyleSheet;
requireCSSKeyframeRule().CSSKeyframeRule;
var parse$1 = requireParse().parse;

const tagName$e = 'style';

/**
 * @implements globalThis.HTMLStyleElement
 */
class HTMLStyleElement extends TextElement {
  constructor(ownerDocument, localName = tagName$e) {
    super(ownerDocument, localName);
    this[SHEET] = null;
  }

  get sheet() {
    const sheet = this[SHEET];
    if (sheet !== null) {
      return sheet;
    }
    return this[SHEET] = parse$1(this.textContent);
  }

  get innerHTML() {
    return super.innerHTML || '';
  }
  set innerHTML(value) {
    super.textContent = value;
    this[SHEET] = null;
  }
  get innerText() {
    return super.innerText || '';
  }
  set innerText(value) {
    super.textContent = value;
    this[SHEET] = null;
  }
  get textContent() {
    return super.textContent || '';
  }
  set textContent(value) {
    super.textContent = value;
    this[SHEET] = null;
  }
}

registerHTMLClass(tagName$e, HTMLStyleElement);

/**
 * @implements globalThis.HTMLTimeElement
 */
class HTMLTimeElement extends HTMLElement {
  constructor(ownerDocument, localName = 'time') {
    super(ownerDocument, localName);
  }

  /**
   * @type {string}
   */
  get dateTime() { return stringAttribute.get(this, 'datetime'); }
  set dateTime(value) { stringAttribute.set(this, 'datetime', value); }
}

registerHTMLClass('time', HTMLTimeElement);

/**
 * @implements globalThis.HTMLFieldSetElement
 */
class HTMLFieldSetElement extends HTMLElement {
  constructor(ownerDocument, localName = 'fieldset') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLEmbedElement
 */
class HTMLEmbedElement extends HTMLElement {
  constructor(ownerDocument, localName = 'embed') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLHRElement
 */
class HTMLHRElement extends HTMLElement {
  constructor(ownerDocument, localName = 'hr') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLProgressElement
 */
class HTMLProgressElement extends HTMLElement {
  constructor(ownerDocument, localName = 'progress') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLParagraphElement
 */
class HTMLParagraphElement extends HTMLElement {
  constructor(ownerDocument, localName = 'p') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLTableElement
 */
class HTMLTableElement extends HTMLElement {
  constructor(ownerDocument, localName = 'table') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLFrameSetElement
 */
class HTMLFrameSetElement extends HTMLElement {
  constructor(ownerDocument, localName = 'frameset') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLLIElement
 */
class HTMLLIElement extends HTMLElement {
  constructor(ownerDocument, localName = 'li') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLBaseElement
 */
class HTMLBaseElement extends HTMLElement {
  constructor(ownerDocument, localName = 'base') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLDataListElement
 */
class HTMLDataListElement extends HTMLElement {
  constructor(ownerDocument, localName = 'datalist') {
    super(ownerDocument, localName);
  }
}

const tagName$d = 'input';

/**
 * @implements globalThis.HTMLInputElement
 */
class HTMLInputElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$d) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get autofocus() { return booleanAttribute.get(this, 'autofocus') || -1; }
  set autofocus(value) { booleanAttribute.set(this, 'autofocus', value); }

  get disabled() { return booleanAttribute.get(this, 'disabled'); }
  set disabled(value) { booleanAttribute.set(this, 'disabled', value); }

  get name() { return this.getAttribute('name'); }
  set name(value) { this.setAttribute('name', value); }

  get placeholder() { return this.getAttribute('placeholder'); }
  set placeholder(value) { this.setAttribute('placeholder', value); }

  get type() { return this.getAttribute('type'); }
  set type(value) { this.setAttribute('type', value); }

  get value() { return stringAttribute.get(this, 'value'); }
  set value(value) { stringAttribute.set(this, 'value', value); }
  /* c8 ignore stop */
}

registerHTMLClass(tagName$d, HTMLInputElement);

/**
 * @implements globalThis.HTMLParamElement
 */
class HTMLParamElement extends HTMLElement {
  constructor(ownerDocument, localName = 'param') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLMediaElement
 */
class HTMLMediaElement extends HTMLElement {
  constructor(ownerDocument, localName = 'media') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLAudioElement
 */
class HTMLAudioElement extends HTMLElement {
  constructor(ownerDocument, localName = 'audio') {
    super(ownerDocument, localName);
  }
}

const tagName$c = 'h1';

/**
 * @implements globalThis.HTMLHeadingElement
 */
class HTMLHeadingElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$c) {
    super(ownerDocument, localName);
  }
}

registerHTMLClass([tagName$c, 'h2', 'h3', 'h4', 'h5', 'h6'], HTMLHeadingElement);

/**
 * @implements globalThis.HTMLDirectoryElement
 */
class HTMLDirectoryElement extends HTMLElement {
  constructor(ownerDocument, localName = 'dir') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLQuoteElement
 */
class HTMLQuoteElement extends HTMLElement {
  constructor(ownerDocument, localName = 'quote') {
    super(ownerDocument, localName);
  }
}

class Canvas {
              constructor(width, height) {
                this.width = width;
                this.height = height;
              }
              getContext() { return null; }
              toDataURL() { return ''; }
            }
            var Canvas$1 = {createCanvas: (width, height) => new Canvas(width, height)};

const {createCanvas} = Canvas$1;

const tagName$b = 'canvas';

/**
 * @implements globalThis.HTMLCanvasElement
 */
class HTMLCanvasElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$b) {
    super(ownerDocument, localName);
    this[IMAGE] = createCanvas(300, 150);
  }

  get width() {
    return this[IMAGE].width;
  }

  set width(value) {
    numericAttribute.set(this, 'width', value);
    this[IMAGE].width = value;
  }

  get height() {
    return this[IMAGE].height;
  }

  set height(value) {
    numericAttribute.set(this, 'height', value);
    this[IMAGE].height = value;
  }

  getContext(type) {
    return this[IMAGE].getContext(type);
  }

  toDataURL(...args) {
    return this[IMAGE].toDataURL(...args);
  }
}

registerHTMLClass(tagName$b, HTMLCanvasElement);

/**
 * @implements globalThis.HTMLLegendElement
 */
class HTMLLegendElement extends HTMLElement {
  constructor(ownerDocument, localName = 'legend') {
    super(ownerDocument, localName);
  }
}

const tagName$a = 'option';

/**
 * @implements globalThis.HTMLOptionElement
 */
class HTMLOptionElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$a) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get value() { return stringAttribute.get(this, 'value'); }
  set value(value) { stringAttribute.set(this, 'value', value); }
  /* c8 ignore stop */

  get selected() { return booleanAttribute.get(this, 'selected'); }
  set selected(value) {
    const option = this.parentElement?.querySelector('option[selected]');
    if (option && option !== this)
      option.selected = false;
    booleanAttribute.set(this, 'selected', value);
  }
}

registerHTMLClass(tagName$a, HTMLOptionElement);

/**
 * @implements globalThis.HTMLSpanElement
 */
class HTMLSpanElement extends HTMLElement {
  constructor(ownerDocument, localName = 'span') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLMeterElement
 */
class HTMLMeterElement extends HTMLElement {
  constructor(ownerDocument, localName = 'meter') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLVideoElement
 */
class HTMLVideoElement extends HTMLElement {
  constructor(ownerDocument, localName = 'video') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLTableCellElement
 */
class HTMLTableCellElement extends HTMLElement {
  constructor(ownerDocument, localName = 'td') {
    super(ownerDocument, localName);
  }
}

const tagName$9 = 'title';

/**
 * @implements globalThis.HTMLTitleElement
 */
class HTMLTitleElement extends TextElement {
  constructor(ownerDocument, localName = tagName$9) {
    super(ownerDocument, localName);
  }
}

registerHTMLClass(tagName$9, HTMLTitleElement);

/**
 * @implements globalThis.HTMLOutputElement
 */
class HTMLOutputElement extends HTMLElement {
  constructor(ownerDocument, localName = 'output') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLTableRowElement
 */
class HTMLTableRowElement extends HTMLElement {
  constructor(ownerDocument, localName = 'tr') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLDataElement
 */
class HTMLDataElement extends HTMLElement {
  constructor(ownerDocument, localName = 'data') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLMenuElement
 */
class HTMLMenuElement extends HTMLElement {
  constructor(ownerDocument, localName = 'menu') {
    super(ownerDocument, localName);
  }
}

const tagName$8 = 'select';

/**
 * @implements globalThis.HTMLSelectElement
 */
class HTMLSelectElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$8) {
    super(ownerDocument, localName);
  }

  get options() {
    let children = new NodeList;
    let {firstElementChild} = this;
    while (firstElementChild) {
      if (firstElementChild.tagName === 'OPTGROUP')
        children.push(...firstElementChild.children);
      else
        children.push(firstElementChild);
      firstElementChild = firstElementChild.nextElementSibling;
    }
    return children;
  }

  /* c8 ignore start */
  get disabled() { return booleanAttribute.get(this, 'disabled'); }
  set disabled(value) { booleanAttribute.set(this, 'disabled', value); }

  get name() { return this.getAttribute('name'); }
  set name(value) { this.setAttribute('name', value); }
  /* c8 ignore stop */

  get value() { return this.querySelector('option[selected]')?.value; }
}

registerHTMLClass(tagName$8, HTMLSelectElement);

/**
 * @implements globalThis.HTMLBRElement
 */
class HTMLBRElement extends HTMLElement {
  constructor(ownerDocument, localName = 'br') {
    super(ownerDocument, localName);
  }
}

const tagName$7 = 'button';

/**
 * @implements globalThis.HTMLButtonElement
 */
class HTMLButtonElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$7) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get disabled() { return booleanAttribute.get(this, 'disabled'); }
  set disabled(value) { booleanAttribute.set(this, 'disabled', value); }

  get name() { return this.getAttribute('name'); }
  set name(value) { this.setAttribute('name', value); }

  get type() { return this.getAttribute('type'); }
  set type(value) { this.setAttribute('type', value); }
  /* c8 ignore stop */
}

registerHTMLClass(tagName$7, HTMLButtonElement);

/**
 * @implements globalThis.HTMLMapElement
 */
class HTMLMapElement extends HTMLElement {
  constructor(ownerDocument, localName = 'map') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLOptGroupElement
 */
class HTMLOptGroupElement extends HTMLElement {
  constructor(ownerDocument, localName = 'optgroup') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLDListElement
 */
class HTMLDListElement extends HTMLElement {
  constructor(ownerDocument, localName = 'dl') {
    super(ownerDocument, localName);
  }
}

const tagName$6 = 'textarea';

/**
 * @implements globalThis.HTMLTextAreaElement
 */
class HTMLTextAreaElement extends TextElement {
  constructor(ownerDocument, localName = tagName$6) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get disabled() { return booleanAttribute.get(this, 'disabled'); }
  set disabled(value) { booleanAttribute.set(this, 'disabled', value); }

  get name() { return this.getAttribute('name'); }
  set name(value) { this.setAttribute('name', value); }

  get placeholder() { return this.getAttribute('placeholder'); }
  set placeholder(value) { this.setAttribute('placeholder', value); }

  get type() { return this.getAttribute('type'); }
  set type(value) { this.setAttribute('type', value); }

  get value() { return this.textContent; }
  set value(content) { this.textContent = content; }
  /* c8 ignore stop */
}

registerHTMLClass(tagName$6, HTMLTextAreaElement);

/**
 * @implements globalThis.HTMLFontElement
 */
class HTMLFontElement extends HTMLElement {
  constructor(ownerDocument, localName = 'font') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLDivElement
 */
class HTMLDivElement extends HTMLElement {
  constructor(ownerDocument, localName = 'div') {
    super(ownerDocument, localName);
  }
}

const tagName$5 = 'link';

/**
 * @implements globalThis.HTMLLinkElement
 */
class HTMLLinkElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$5) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */ // copy paste from img.src, already covered
  get disabled() { return booleanAttribute.get(this, 'disabled'); }
  set disabled(value) { booleanAttribute.set(this, 'disabled', value); }

  get href() { return stringAttribute.get(this, 'href'); }
  set href(value) { stringAttribute.set(this, 'href', value); }

  get hreflang() { return stringAttribute.get(this, 'hreflang'); }
  set hreflang(value) { stringAttribute.set(this, 'hreflang', value); }

  get media() { return stringAttribute.get(this, 'media'); }
  set media(value) { stringAttribute.set(this, 'media', value); }

  get rel() { return stringAttribute.get(this, 'rel'); }
  set rel(value) { stringAttribute.set(this, 'rel', value); }

  get type() { return stringAttribute.get(this, 'type'); }
  set type(value) { stringAttribute.set(this, 'type', value); }
  /* c8 ignore stop */

}

registerHTMLClass(tagName$5, HTMLLinkElement);

const tagName$4 = 'slot';

/**
 * @implements globalThis.HTMLSlotElement
 */
class HTMLSlotElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$4) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get name() { return this.getAttribute('name'); }
  set name(value) { this.setAttribute('name', value); }

  assign() {}

  assignedNodes(options) {
    const isNamedSlot = !!this.name;
    const hostChildNodes = this.getRootNode().host?.childNodes ?? [];
    let slottables;

    if (isNamedSlot) {
      slottables = [...hostChildNodes].filter(node => node.slot === this.name);
    } else {
      slottables = [...hostChildNodes].filter(node => !node.slot);
    }

    if (options?.flatten) {
      const result = [];

      // Element and Text nodes are slottables. A slot can be a slottable.
      for (let slottable of slottables) {
        if (slottable.localName === 'slot') {
          result.push(...slottable.assignedNodes({ flatten: true }));
        } else {
          result.push(slottable);
        }
      }

      slottables = result;
    }

    // If no assigned nodes are found, it returns the slot's fallback content.
    return slottables.length ? slottables : [...this.childNodes];
  }

  assignedElements(options) {
    const slottables = this.assignedNodes(options).filter(n => n.nodeType === 1);

    // If no assigned elements are found, it returns the slot's fallback content.
    return slottables.length ? slottables : [...this.children];
  }
  /* c8 ignore stop */
}

registerHTMLClass(tagName$4, HTMLSlotElement);

/**
 * @implements globalThis.HTMLFormElement
 */
class HTMLFormElement extends HTMLElement {
  constructor(ownerDocument, localName = 'form') {
    super(ownerDocument, localName);
  }
}

const tagName$3 = 'img';

/**
 * @implements globalThis.HTMLImageElement
 */
class HTMLImageElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$3) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get alt() { return stringAttribute.get(this, 'alt'); }
  set alt(value) { stringAttribute.set(this, 'alt', value); }

  get sizes() { return stringAttribute.get(this, 'sizes'); }
  set sizes(value) { stringAttribute.set(this, 'sizes', value); }

  get src() { return stringAttribute.get(this, 'src'); }
  set src(value) { stringAttribute.set(this, 'src', value); }

  get srcset() { return stringAttribute.get(this, 'srcset'); }
  set srcset(value) { stringAttribute.set(this, 'srcset', value); }

  get title() { return stringAttribute.get(this, 'title'); }
  set title(value) { stringAttribute.set(this, 'title', value); }

  get width() { return numericAttribute.get(this, 'width'); }
  set width(value) { numericAttribute.set(this, 'width', value); }

  get height() { return numericAttribute.get(this, 'height'); }
  set height(value) { numericAttribute.set(this, 'height', value); }
  /* c8 ignore stop */
}

registerHTMLClass(tagName$3, HTMLImageElement);

/**
 * @implements globalThis.HTMLPreElement
 */
class HTMLPreElement extends HTMLElement {
  constructor(ownerDocument, localName = 'pre') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLUListElement
 */
class HTMLUListElement extends HTMLElement {
  constructor(ownerDocument, localName = 'ul') {
    super(ownerDocument, localName);
  }
}

const tagName$2 = 'meta';
/**
 * @implements globalThis.HTMLMetaElement
 */
class HTMLMetaElement extends HTMLElement {
  constructor(ownerDocument, localName =tagName$2) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get name() { return stringAttribute.get(this, 'name'); }
  set name(value) { stringAttribute.set(this, 'name', value); }

  get httpEquiv() { return stringAttribute.get(this, 'http-equiv'); }
  set httpEquiv(value) { stringAttribute.set(this, 'http-equiv', value); }

  get content() { return stringAttribute.get(this, 'content'); }
  set content(value) { stringAttribute.set(this, 'content', value); }

  get charset() { return stringAttribute.get(this, 'charset'); }
  set charset(value) { stringAttribute.set(this, 'charset', value); }

  get media() { return stringAttribute.get(this, 'media'); }
  set media(value) { stringAttribute.set(this, 'media', value); }
  /* c8 ignore stop */

}

registerHTMLClass(tagName$2, HTMLMetaElement);

/**
 * @implements globalThis.HTMLPictureElement
 */
class HTMLPictureElement extends HTMLElement {
  constructor(ownerDocument, localName = 'picture') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLAreaElement
 */
class HTMLAreaElement extends HTMLElement {
  constructor(ownerDocument, localName = 'area') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLOListElement
 */
class HTMLOListElement extends HTMLElement {
  constructor(ownerDocument, localName = 'ol') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLTableCaptionElement
 */
class HTMLTableCaptionElement extends HTMLElement {
  constructor(ownerDocument, localName = 'caption') {
    super(ownerDocument, localName);
  }
}

const tagName$1 = 'a';

/**
 * @implements globalThis.HTMLAnchorElement
 */
class HTMLAnchorElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName$1) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */ // copy paste from img.src, already covered
  get href() { return encodeURI(decodeURI(stringAttribute.get(this, 'href'))); }
  set href(value) { stringAttribute.set(this, 'href', decodeURI(value)); }

  get download() { return encodeURI(decodeURI(stringAttribute.get(this, 'download'))); }
  set download(value) { stringAttribute.set(this, 'download', decodeURI(value)); }

  get target() { return stringAttribute.get(this, 'target'); }
  set target(value) { stringAttribute.set(this, 'target', value); }

  get type() { return stringAttribute.get(this, 'type'); }
  set type(value) { stringAttribute.set(this, 'type', value); }

  get rel() { return stringAttribute.get(this, 'rel'); }
  set rel(value) { stringAttribute.set(this, 'rel', value); }
  /* c8 ignore stop */

}

registerHTMLClass(tagName$1, HTMLAnchorElement);

/**
 * @implements globalThis.HTMLLabelElement
 */
class HTMLLabelElement extends HTMLElement {
  constructor(ownerDocument, localName = 'label') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLUnknownElement
 */
class HTMLUnknownElement extends HTMLElement {
  constructor(ownerDocument, localName = 'unknown') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLModElement
 */
class HTMLModElement extends HTMLElement {
  constructor(ownerDocument, localName = 'mod') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLDetailsElement
 */
class HTMLDetailsElement extends HTMLElement {
  constructor(ownerDocument, localName = 'details') {
    super(ownerDocument, localName);
  }
}

const tagName = 'source';

/**
 * @implements globalThis.HTMLSourceElement
 */
class HTMLSourceElement extends HTMLElement {
  constructor(ownerDocument, localName = tagName) {
    super(ownerDocument, localName);
  }

  /* c8 ignore start */
  get src() { return stringAttribute.get(this, 'src'); }
  set src(value) { stringAttribute.set(this, 'src', value); }

  get srcset() { return stringAttribute.get(this, 'srcset'); }
  set srcset(value) { stringAttribute.set(this, 'srcset', value); }

  get sizes() { return stringAttribute.get(this, 'sizes'); }
  set sizes(value) { stringAttribute.set(this, 'sizes', value); }

  get type() { return stringAttribute.get(this, 'type'); }
  set type(value) { stringAttribute.set(this, 'type', value); }
  /* c8 ignore stop */
}

registerHTMLClass(tagName, HTMLSourceElement);

/**
 * @implements globalThis.HTMLTrackElement
 */
class HTMLTrackElement extends HTMLElement {
  constructor(ownerDocument, localName = 'track') {
    super(ownerDocument, localName);
  }
}

/**
 * @implements globalThis.HTMLMarqueeElement
 */
class HTMLMarqueeElement extends HTMLElement {
  constructor(ownerDocument, localName = 'marquee') {
    super(ownerDocument, localName);
  }
}

const HTMLClasses = {
  HTMLElement,
  HTMLTemplateElement,
  HTMLHtmlElement,
  HTMLScriptElement,
  HTMLFrameElement,
  HTMLIFrameElement,
  HTMLObjectElement,
  HTMLHeadElement,
  HTMLBodyElement,
  HTMLStyleElement,
  HTMLTimeElement,
  HTMLFieldSetElement,
  HTMLEmbedElement,
  HTMLHRElement,
  HTMLProgressElement,
  HTMLParagraphElement,
  HTMLTableElement,
  HTMLFrameSetElement,
  HTMLLIElement,
  HTMLBaseElement,
  HTMLDataListElement,
  HTMLInputElement,
  HTMLParamElement,
  HTMLMediaElement,
  HTMLAudioElement,
  HTMLHeadingElement,
  HTMLDirectoryElement,
  HTMLQuoteElement,
  HTMLCanvasElement,
  HTMLLegendElement,
  HTMLOptionElement,
  HTMLSpanElement,
  HTMLMeterElement,
  HTMLVideoElement,
  HTMLTableCellElement,
  HTMLTitleElement,
  HTMLOutputElement,
  HTMLTableRowElement,
  HTMLDataElement,
  HTMLMenuElement,
  HTMLSelectElement,
  HTMLBRElement,
  HTMLButtonElement,
  HTMLMapElement,
  HTMLOptGroupElement,
  HTMLDListElement,
  HTMLTextAreaElement,
  HTMLFontElement,
  HTMLDivElement,
  HTMLLinkElement,
  HTMLSlotElement,
  HTMLFormElement,
  HTMLImageElement,
  HTMLPreElement,
  HTMLUListElement,
  HTMLMetaElement,
  HTMLPictureElement,
  HTMLAreaElement,
  HTMLOListElement,
  HTMLTableCaptionElement,
  HTMLAnchorElement,
  HTMLLabelElement,
  HTMLUnknownElement,
  HTMLModElement,
  HTMLDetailsElement,
  HTMLSourceElement,
  HTMLTrackElement,
  HTMLMarqueeElement
};

// TODO: ensure all these are text only
// /^(?:plaintext|script|style|textarea|title|xmp)$/i

const voidElements = {test: () => true};
const Mime = {
  'text/html': {
    docType: '<!DOCTYPE html>',
    ignoreCase: true,
    voidElements: /^(?:area|base|br|col|embed|hr|img|input|keygen|link|menuitem|meta|param|source|track|wbr)$/i
  },
  'image/svg+xml': {
    docType: '<?xml version="1.0" encoding="utf-8"?>',
    ignoreCase: false,
    voidElements
  },
  'text/xml': {
    docType: '<?xml version="1.0" encoding="utf-8"?>',
    ignoreCase: false,
    voidElements
  },
  'application/xml': {
    docType: '<?xml version="1.0" encoding="utf-8"?>',
    ignoreCase: false,
    voidElements
  },
  'application/xhtml+xml': {
    docType: '<?xml version="1.0" encoding="utf-8"?>',
    ignoreCase: false,
    voidElements
  }
};

// https://dom.spec.whatwg.org/#interface-customevent


/**
 * @implements globalThis.CustomEvent
 */
class CustomEvent extends GlobalEvent {
  constructor(type, eventInitDict = {}) {
    super(type, eventInitDict);
    this.detail = eventInitDict.detail;
  }
}

/* c8 ignore stop */

// https://dom.spec.whatwg.org/#interface-customevent


/**
 * @implements globalThis.InputEvent
 */
class InputEvent extends GlobalEvent {
  constructor(type, inputEventInit = {}) {
    super(type, inputEventInit);
    this.inputType = inputEventInit.inputType;
    this.data = inputEventInit.data;
    this.dataTransfer = inputEventInit.dataTransfer;
    this.isComposing = inputEventInit.isComposing || false;
    this.ranges = inputEventInit.ranges;
  }
}
/* c8 ignore stop */

const ImageClass = ownerDocument =>
/**
 * @implements globalThis.Image
 */
class Image extends HTMLImageElement {
  constructor(width, height) {
    super(ownerDocument);
    switch (arguments.length) {
      case 1:
        this.height = width;
        this.width = width;
        break;
      case 2:
        this.height = height;
        this.width = width;
        break;
    }
  }
};

// https://dom.spec.whatwg.org/#concept-live-range


const deleteContents = ({[START]: start, [END]: end}, fragment = null) => {
  setAdjacent(start[PREV], end[NEXT]);
  do {
    const after = getEnd(start);
    const next = after === end ? after : after[NEXT];
    if (fragment)
      fragment.insertBefore(start, fragment[END]);
    else
      start.remove();
    start = next;
  } while (start !== end);
};

/**
 * @implements globalThis.Range
 */
class Range {
  constructor() {
    this[START] = null;
    this[END] = null;
    this.commonAncestorContainer = null;
  }

  /* TODO: this is more complicated than it looks
  setStart(node, offset) {
    this[START] = node.childNodes[offset];
  }

  setEnd(node, offset) {
    this[END] = getEnd(node.childNodes[offset]);
  }
  //*/

  insertNode(newNode) {
    this[END].parentNode.insertBefore(newNode, this[START]);
  }

  selectNode(node) {
    this[START] = node;
    this[END] = getEnd(node);
  }

  // TODO: SVG elements should then create contextual fragments
  //       that return SVG nodes
  selectNodeContents(node) {
    this.selectNode(node);
    this.commonAncestorContainer = node;
  }

  surroundContents(parentNode) {
    parentNode.replaceChildren(this.extractContents());
  }

  setStartBefore(node) {
    this[START] = node;
  }

  setStartAfter(node) {
    this[START] = node.nextSibling;
  }

  setEndBefore(node) {
    this[END] = getEnd(node.previousSibling);
  }

  setEndAfter(node) {
    this[END] = getEnd(node);
  }

  cloneContents() {
    let {[START]: start, [END]: end} = this;
    const fragment = start.ownerDocument.createDocumentFragment();
    while (start !== end) {
      fragment.insertBefore(start.cloneNode(true), fragment[END]);
      start = getEnd(start);
      if (start !== end)
        start = start[NEXT];
    }
    return fragment;
  }

  deleteContents() {
    deleteContents(this);
  }

  extractContents() {
    const fragment = this[START].ownerDocument.createDocumentFragment();
    deleteContents(this, fragment);
    return fragment;
  }

  createContextualFragment(html) {
    const { commonAncestorContainer: doc } = this;
    const isSVG = 'ownerSVGElement' in doc;
    const document = isSVG ? doc.ownerDocument : doc;
    const template = document.createElement('template');
    template.innerHTML = html;
    let {content} = template;
    if (isSVG) {
      const childNodes = [...content.childNodes];
      content = document.createDocumentFragment();
      Object.setPrototypeOf(content, SVGElement$1.prototype);
      content.ownerSVGElement = document;
      for (const child of childNodes) {
        Object.setPrototypeOf(child, SVGElement$1.prototype);
        child.ownerSVGElement = document;
        content.appendChild(child);
      }
    }
    else
      this.selectNode(content);
    return content;
  }

  cloneRange() {
    const range = new Range;
    range[START] = this[START];
    range[END] = this[END];
    return range;
  }
}

const isOK = ({nodeType}, mask) => {
  switch (nodeType) {
    case ELEMENT_NODE:
      return mask & SHOW_ELEMENT;
    case TEXT_NODE:
      return mask & SHOW_TEXT;
    case COMMENT_NODE:
      return mask & SHOW_COMMENT;
    case CDATA_SECTION_NODE:
      return mask & SHOW_CDATA_SECTION;
  }
  return 0;
};

/**
 * @implements globalThis.TreeWalker
 */
class TreeWalker {
  constructor(root, whatToShow = SHOW_ALL) {
    this.root = root;
    this.currentNode = root;
    this.whatToShow = whatToShow;
    let {[NEXT]: next, [END]: end} = root;
    if (root.nodeType === DOCUMENT_NODE) {
      const {documentElement} = root;
      next = documentElement;
      end = documentElement[END];
    }
    const nodes = [];
    while (next && next !== end) {
      if (isOK(next, whatToShow))
        nodes.push(next);
      next = next[NEXT];
    }
    this[PRIVATE] = {i: 0, nodes};
  }

  nextNode() {
    const $ = this[PRIVATE];
    this.currentNode = $.i < $.nodes.length ? $.nodes[$.i++] : null;
    return this.currentNode;
  }
}

const query = (method, ownerDocument, selectors) => {
  let {[NEXT]: next, [END]: end} = ownerDocument;
  return method.call({ownerDocument, [NEXT]: next, [END]: end}, selectors);
};

const globalExports = assign(
  {},
  Facades,
  HTMLClasses,
  {
    CustomEvent,
    Event: GlobalEvent,
    EventTarget: DOMEventTarget,
    InputEvent,
    NamedNodeMap,
    NodeList
  }
);

const window = new WeakMap;

/**
 * @implements globalThis.Document
 */
let Document$1 = class Document extends NonElementParentNode {
  constructor(type) {
    super(null, '#document', DOCUMENT_NODE);
    this[CUSTOM_ELEMENTS] = {active: false, registry: null};
    this[MUTATION_OBSERVER] = {active: false, class: null};
    this[MIME] = Mime[type];
    /** @type {DocumentType} */
    this[DOCTYPE] = null;
    this[DOM_PARSER] = null;
    this[GLOBALS] = null;
    this[IMAGE] = null;
    this[UPGRADE] = null;
  }

  /**
   * @type {globalThis.Document['defaultView']}
   */
  get defaultView() {
    if (!window.has(this))
      window.set(this, new Proxy(globalThis, {
        set: (target, name, value) => {
          switch (name) {
            case 'addEventListener':
            case 'removeEventListener':
            case 'dispatchEvent':
              this[EVENT_TARGET][name] = value;
              break;
            default:
              target[name] = value;
              break;
          }
          return true;
        },
        get: (globalThis, name) => {
          switch (name) {
            case 'addEventListener':
            case 'removeEventListener':
            case 'dispatchEvent':
              if (!this[EVENT_TARGET]) {
                const et = this[EVENT_TARGET] = new DOMEventTarget;
                et.dispatchEvent = et.dispatchEvent.bind(et);
                et.addEventListener = et.addEventListener.bind(et);
                et.removeEventListener = et.removeEventListener.bind(et);
              }
              return this[EVENT_TARGET][name];
            case 'document':
              return this;
            /* c8 ignore start */
            case 'navigator':
              return {
                userAgent: 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36'
              };
            /* c8 ignore stop */
            case 'window':
              return window.get(this);
            case 'customElements':
              if (!this[CUSTOM_ELEMENTS].registry)
                this[CUSTOM_ELEMENTS] = new CustomElementRegistry(this);
              return this[CUSTOM_ELEMENTS];
            case 'performance':
              return performance;
            case 'DOMParser':
              return this[DOM_PARSER];
            case 'Image':
              if (!this[IMAGE])
                this[IMAGE] = ImageClass(this);
              return this[IMAGE];
            case 'MutationObserver':
              if (!this[MUTATION_OBSERVER].class)
                this[MUTATION_OBSERVER] = new MutationObserverClass(this);
              return this[MUTATION_OBSERVER].class;
          }
          return (this[GLOBALS] && this[GLOBALS][name]) ||
                  globalExports[name] ||
                  globalThis[name];
        }
      }));
    return window.get(this);
  }

  get doctype() {
    const docType = this[DOCTYPE];
    if (docType)
      return docType;
    const {firstChild} = this;
    if (firstChild && firstChild.nodeType === DOCUMENT_TYPE_NODE)
      return (this[DOCTYPE] = firstChild);
    return null;
  }

  set doctype(value) {
    if (/^([a-z:]+)(\s+system|\s+public(\s+"([^"]+)")?)?(\s+"([^"]+)")?/i.test(value)) {
      const {$1: name, $4: publicId, $6: systemId} = RegExp;
      this[DOCTYPE] = new DocumentType$1(this, name, publicId, systemId);
      knownSiblings(this, this[DOCTYPE], this[NEXT]);
    }
  }

  get documentElement() {
    return this.firstElementChild;
  }

  get isConnected() { return true; }

  /**
   * @protected
   */
   _getParent() {
    return this[EVENT_TARGET];
  }

  createAttribute(name) { return new Attr$1(this, name); }
  createCDATASection(data) { return new CDATASection$1(this, data); }
  createComment(textContent) { return new Comment$1(this, textContent); }
  createDocumentFragment() { return new DocumentFragment$1(this); }
  createDocumentType(name, publicId, systemId) { return new DocumentType$1(this, name, publicId, systemId); }
  createElement(localName) { return new Element$1(this, localName); }
  createRange() {
    const range = new Range;
    range.commonAncestorContainer = this;
    return range;
  }
  createTextNode(textContent) { return new Text$1(this, textContent); }
  createTreeWalker(root, whatToShow = -1) { return new TreeWalker(root, whatToShow); }
  createNodeIterator(root, whatToShow = -1) { return this.createTreeWalker(root, whatToShow); }

  createEvent(name) {
    const event = create$1(name === 'Event' ? new GlobalEvent('') : new CustomEvent(''));
    event.initEvent = event.initCustomEvent = (
      type,
      canBubble = false,
      cancelable = false,
      detail
    ) => {
      event.bubbles = !!canBubble;

      defineProperties(event, {
        type: {value: type},
        canBubble: {value: canBubble},
        cancelable: {value: cancelable},
        detail: {value: detail}
      });
    };
    return event;
  }

  cloneNode(deep = false) {
    const {
      constructor,
      [CUSTOM_ELEMENTS]: customElements,
      [DOCTYPE]: doctype
    } = this;
    const document = new constructor();
    document[CUSTOM_ELEMENTS] = customElements;
    if (deep) {
      const end = document[END];
      const {childNodes} = this;
      for (let {length} = childNodes, i = 0; i < length; i++)
        document.insertBefore(childNodes[i].cloneNode(true), end);
      if (doctype)
        document[DOCTYPE] = childNodes[0];
    }
    return document;
  }

  importNode(externalNode) {
    // important: keep the signature length as *one*
    // or it would behave like old IE or Edge with polyfills
    const deep = 1 < arguments.length && !!arguments[1];
    const node = externalNode.cloneNode(deep);
    const {[CUSTOM_ELEMENTS]: customElements} = this;
    const {active} = customElements;
    const upgrade = element => {
      const {ownerDocument, nodeType} = element;
      element.ownerDocument = this;
      if (active && ownerDocument !== this && nodeType === ELEMENT_NODE)
        customElements.upgrade(element);
    };
    upgrade(node);
    if (deep) {
      switch (node.nodeType) {
        case ELEMENT_NODE:
        case DOCUMENT_FRAGMENT_NODE: {
          let {[NEXT]: next, [END]: end} = node;
          while (next !== end) {
            if (next.nodeType === ELEMENT_NODE)
              upgrade(next);
            next = next[NEXT];
          }
          break;
        }
      }
    }
    return node;
  }

  toString() { return this.childNodes.join(''); }

  querySelector(selectors) {
    return query(super.querySelector, this, selectors);
  }

  querySelectorAll(selectors) {
    return query(super.querySelectorAll, this, selectors);
  }

  /* c8 ignore start */
  getElementsByTagNameNS(_, name) {
    return this.getElementsByTagName(name);
  }
  createAttributeNS(_, name) {
    return this.createAttribute(name);
  }
  createElementNS(nsp, localName, options) {
    return nsp === SVG_NAMESPACE ?
            new SVGElement$1(this, localName, null) :
            this.createElement(localName, options);
  }
  /* c8 ignore stop */
};

setPrototypeOf(
  globalExports.Document = function Document() {
    illegalConstructor();
  },
  Document$1
).prototype = Document$1.prototype;

const createHTMLElement$1 = (ownerDocument, builtin, localName, options) => {
  if (!builtin && htmlClasses.has(localName)) {
    const Class = htmlClasses.get(localName);
    return new Class(ownerDocument, localName);
  }
  const {[CUSTOM_ELEMENTS]: {active, registry}} = ownerDocument;
  if (active) {
    const ce = builtin ? options.is : localName;
    if (registry.has(ce)) {
      const {Class} = registry.get(ce);
      const element = new Class(ownerDocument, localName);
      customElements.set(element, {connected: false});
      return element;
    }
  }
  return new HTMLElement(ownerDocument, localName);
};

/**
 * @implements globalThis.HTMLDocument
 */
class HTMLDocument extends Document$1 {
  constructor() { super('text/html'); }

  get all() {
    const nodeList = new NodeList;
    let {[NEXT]: next, [END]: end} = this;
    while (next !== end) {
      switch (next.nodeType) {
        case ELEMENT_NODE:
          nodeList.push(next);
          break;
      }
      next = next[NEXT];
    }
    return nodeList;
  }

  /**
   * @type HTMLHeadElement
   */
  get head() {
    const {documentElement} = this;
    let {firstElementChild} = documentElement;
    if (!firstElementChild || firstElementChild.tagName !== 'HEAD') {
      firstElementChild = this.createElement('head');
      documentElement.prepend(firstElementChild);
    }
    return firstElementChild;
  }

  /**
   * @type HTMLBodyElement
   */
  get body() {
    const {head} = this;
    let {nextElementSibling} = head;
    if (!nextElementSibling || nextElementSibling.tagName !== 'BODY') {
      nextElementSibling = this.createElement('body');
      head.after(nextElementSibling);
    }
    return nextElementSibling;
  }

  /**
   * @type HTMLTitleElement
   */
  get title() {
    const {head} = this;
    return head.getElementsByTagName('title').at(0)?.textContent || '';
  }

  set title(textContent) {
    const {head} = this;
    let title = head.getElementsByTagName('title').at(0);
    if (title)
      title.textContent = textContent;
    else {
      head.insertBefore(
        this.createElement('title'),
        head.firstChild
      ).textContent = textContent;
    }
  }

  createElement(localName, options) {
    const builtin = !!(options && options.is);
    const element = createHTMLElement$1(this, builtin, localName, options);
    if (builtin)
      element.setAttribute('is', options.is);
    return element;
  }
}

/**
 * @implements globalThis.Document
 */
class SVGDocument extends Document$1 {
  constructor() { super('image/svg+xml'); }
  toString() {
    return this[MIME].docType + super.toString();
  }
}

/**
 * @implements globalThis.XMLDocument
 */
class XMLDocument extends Document$1 {
  constructor() { super('text/xml'); }
  toString() {
    return this[MIME].docType + super.toString();
  }
}

/**
 * @implements globalThis.DOMParser
 */
class DOMParser {

  /** @typedef {{ "text/html": HTMLDocument, "image/svg+xml": SVGDocument, "text/xml": XMLDocument }} MimeToDoc */
  /**
   * @template {keyof MimeToDoc} MIME
   * @param {string} markupLanguage
   * @param {MIME} mimeType
   * @returns {MimeToDoc[MIME]}
   */
  parseFromString(markupLanguage, mimeType, globals = null) {
    let isHTML = false, document;
    if (mimeType === 'text/html') {
      isHTML = true;
      document = new HTMLDocument;
    }
    else if (mimeType === 'image/svg+xml')
      document = new SVGDocument;
    else
      document = new XMLDocument;
    document[DOM_PARSER] = DOMParser;
    if (globals)
      document[GLOBALS] = globals;
    if (isHTML && markupLanguage === '...')
      markupLanguage = '<!doctype html><html><head></head><body></body></html>';
    return markupLanguage ?
            parseFromString(document, isHTML, markupLanguage) :
            document;
  }
}

const {parse} = JSON;

const append = (parentNode, node, end) => {
  node.parentNode = parentNode;
  knownSiblings(end[PREV], node, end);
};

const createHTMLElement = (ownerDocument, localName) => {
  if (htmlClasses.has(localName)) {
    const Class = htmlClasses.get(localName);
    return new Class(ownerDocument, localName);
  }
  return new HTMLElement(ownerDocument, localName);
};

/**
 * @typedef {number|string} jsdonValue - either a node type or its content
 */

/**
 * Given a stringified, or arrayfied DOM element, returns an HTMLDocument
 * that represent the content of such string, or array.
 * @param {string|jsdonValue[]} value
 * @returns {HTMLDocument}
 */
const parseJSON = value => {
  const array = typeof value === 'string' ? parse(value) : value;
  const {length} = array;
  const document = new HTMLDocument;
  let parentNode = document, end = parentNode[END], svg = false, i = 0;
  while (i < length) {
    let nodeType = array[i++];
    switch (nodeType) {
      case ELEMENT_NODE: {
        const localName = array[i++];
        const isSVG = svg || localName === 'svg' || localName === 'SVG';
        const element = isSVG ?
                          new SVGElement$1(document, localName, parentNode.ownerSVGElement || null) :
                          createHTMLElement(document, localName);
        knownBoundaries(end[PREV], element, end);
        element.parentNode = parentNode;
        parentNode = element;
        end = parentNode[END];
        svg = isSVG;
        break;
      }
      case ATTRIBUTE_NODE: {
        const name = array[i++];
        const value = typeof array[i] === 'string' ? array[i++] : '';
        const attr = new Attr$1(document, name, value);
        attr.ownerElement = parentNode;
        knownSiblings(end[PREV], attr, end);
        break;
      }
      case TEXT_NODE:
        append(parentNode, new Text$1(document, array[i++]), end);
        break;
      case COMMENT_NODE:
        append(parentNode, new Comment$1(document, array[i++]), end);
        break;
      case CDATA_SECTION_NODE:
        append(parentNode, new CDATASection$1(document, array[i++]), end);
        break;
      case DOCUMENT_TYPE_NODE: {
        const args = [document];
        while (typeof array[i] === 'string')
          args.push(array[i++]);
        if (args.length === 3 && /\.dtd$/i.test(args[2]))
          args.splice(2, 0, '');
        append(parentNode, new DocumentType$1(...args), end);
        break;
      }
      case DOCUMENT_FRAGMENT_NODE:
        parentNode = document.createDocumentFragment();
        end = parentNode[END];
      /* eslint no-fallthrough:0 */
      case DOCUMENT_NODE:
        break;
      default:
        do {
          nodeType -= NODE_END;
          if (svg && !parentNode.ownerSVGElement)
            svg = false;
          parentNode = parentNode.parentNode || parentNode;
        } while (nodeType < 0);
        end = parentNode[END];
        break;
    }
  }
  switch (i && array[0]) {
    case ELEMENT_NODE:
      return document.firstElementChild;
    case DOCUMENT_FRAGMENT_NODE:
      return parentNode;
  }
  return document;
};

/**
 * 
 * @param {Document|Element} node the Document or Element to serialize
 * @returns {jsdonValue[]} the linear jsdon serialized array
 */
const toJSON = node => node.toJSON();

class NodeFilter {
  static get SHOW_ALL() { return SHOW_ALL; }
  static get SHOW_ELEMENT() { return SHOW_ELEMENT; }
  static get SHOW_COMMENT() { return SHOW_COMMENT; }
  static get SHOW_CDATA_SECTION() { return SHOW_CDATA_SECTION; }
  static get SHOW_TEXT() { return SHOW_TEXT; }
}

const parseHTML = (html, globals = null) => (new DOMParser).parseFromString(
  html, 'text/html', globals
).defaultView;

function Document() {
  illegalConstructor();
}

setPrototypeOf(Document, Document$1).prototype = Document$1.prototype;

export { Attr, CDATASection, CharacterData, Comment, CustomEvent, DOMParser, Document, DocumentFragment, DocumentType, Element, GlobalEvent as Event, DOMEventTarget as EventTarget, Facades, HTMLAnchorElement, HTMLAreaElement, HTMLAudioElement, HTMLBRElement, HTMLBaseElement, HTMLBodyElement, HTMLButtonElement, HTMLCanvasElement, HTMLClasses, HTMLDListElement, HTMLDataElement, HTMLDataListElement, HTMLDetailsElement, HTMLDirectoryElement, HTMLDivElement, HTMLElement, HTMLEmbedElement, HTMLFieldSetElement, HTMLFontElement, HTMLFormElement, HTMLFrameElement, HTMLFrameSetElement, HTMLHRElement, HTMLHeadElement, HTMLHeadingElement, HTMLHtmlElement, HTMLIFrameElement, HTMLImageElement, HTMLInputElement, HTMLLIElement, HTMLLabelElement, HTMLLegendElement, HTMLLinkElement, HTMLMapElement, HTMLMarqueeElement, HTMLMediaElement, HTMLMenuElement, HTMLMetaElement, HTMLMeterElement, HTMLModElement, HTMLOListElement, HTMLObjectElement, HTMLOptGroupElement, HTMLOptionElement, HTMLOutputElement, HTMLParagraphElement, HTMLParamElement, HTMLPictureElement, HTMLPreElement, HTMLProgressElement, HTMLQuoteElement, HTMLScriptElement, HTMLSelectElement, HTMLSlotElement, HTMLSourceElement, HTMLSpanElement, HTMLStyleElement, HTMLTableCaptionElement, HTMLTableCellElement, HTMLTableElement, HTMLTableRowElement, HTMLTemplateElement, HTMLTextAreaElement, HTMLTimeElement, HTMLTitleElement, HTMLTrackElement, HTMLUListElement, HTMLUnknownElement, HTMLVideoElement, InputEvent, Node, NodeFilter, NodeList, SVGElement, ShadowRoot, Text, illegalConstructor, parseHTML, parseJSON, toJSON };