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include.js
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include.js
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const d = document
export function isHTML(value) {
return (value instanceof HTMLElement || value === d)
}
/**
* @param {HTMLElement} value
* @return {value}
*/
export function validHTML(value) {
if (isHTML(value)) {
return value
}
throw new TypeError("Bad argument. Required a HTMLElement")
}
if (typeof HTMLElement.prototype.getElementsById !== "function") {
Object.defineProperty(HTMLElement.prototype, "getElementById", {
/**
* @param {string} id
* @return {HTMLElement}
*/
value: function (id) {
if (!isHTML(this)) {
throw new TypeError("`this` is not HTMLElement")
}
if ("string" !== typeof id || id === "") {
throw new Error("Bad argument. Unexpected `id`. Required a string")
}
return this.querySelector("#" + id)
}
})
}