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index.js
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// This is the backend that is injected into the page that a Vue app lives in
// when the Vue Devtools panel is activated.
import { highlight, unHighlight, getInstanceOrVnodeRect } from './highlighter'
import { initVuexBackend } from './vuex'
import { initEventsBackend } from './events'
import { initRouterBackend } from './router'
import { initPerfBackend } from './perf'
import { findRelatedComponent } from './utils'
import ComponentSelector from './component-selector'
import {
stringify,
classify,
camelize,
set,
has,
parse,
getComponentName,
getCustomRefDetails
} from '@utils/util'
import SharedData, { init as initSharedData } from '@utils/shared-data'
import { isBrowser, target } from '@utils/env'
// hook should have been injected before this executes.
const hook = target.__VUE_DEVTOOLS_GLOBAL_HOOK__
const rootInstances = []
const propModes = ['default', 'sync', 'once']
export const instanceMap = target.__VUE_DEVTOOLS_INSTANCE_MAP__ = new Map()
export const functionalVnodeMap = target.__VUE_DEVTOOLS_FUNCTIONAL_VNODE_MAP__ = new Map()
const consoleBoundInstances = Array(5)
let currentInspectedId
let bridge
let filter = ''
let captureCount = 0
let isLegacy = false
let rootUID = 0
let functionalIds = new Map()
// Dedupe instances
// Some instances may be both on a component and on a child abstract/functional component
const captureIds = new Map()
export function initBackend (_bridge) {
bridge = _bridge
if (hook.Vue) {
isLegacy = hook.Vue.version && hook.Vue.version.split('.')[0] === '1'
connect(hook.Vue)
} else {
hook.once('init', connect)
}
initRightClick()
}
function connect (Vue) {
initSharedData({
bridge,
Vue
}).then(() => {
hook.currentTab = 'components'
bridge.on('switch-tab', tab => {
hook.currentTab = tab
if (tab === 'components') {
flush()
}
})
// the backend may get injected to the same page multiple times
// if the user closes and reopens the devtools.
// make sure there's only one flush listener.
hook.off('flush')
hook.on('flush', () => {
if (hook.currentTab === 'components') {
flush()
}
})
bridge.on('select-instance', id => {
currentInspectedId = id
const instance = findInstanceOrVnode(id)
if (!instance) return
if (!/:functional:/.test(id)) bindToConsole(instance)
flush()
bridge.send('instance-selected')
})
bridge.on('scroll-to-instance', id => {
const instance = findInstanceOrVnode(id)
if (instance) {
scrollIntoView(instance)
highlight(instance)
}
})
bridge.on('filter-instances', _filter => {
filter = _filter.toLowerCase()
flush()
})
bridge.on('refresh', scan)
bridge.on('enter-instance', id => {
const instance = findInstanceOrVnode(id)
if (instance) highlight(instance)
})
bridge.on('leave-instance', unHighlight)
// eslint-disable-next-line no-new
new ComponentSelector(bridge, instanceMap)
// Get the instance id that is targeted by context menu
bridge.on('get-context-menu-target', () => {
const instance = target.__VUE_DEVTOOLS_CONTEXT_MENU_TARGET__
target.__VUE_DEVTOOLS_CONTEXT_MENU_TARGET__ = null
target.__VUE_DEVTOOLS_CONTEXT_MENU_HAS_TARGET__ = false
if (instance) {
const id = instance.__VUE_DEVTOOLS_UID__
if (id) {
return bridge.send('inspect-instance', id)
}
}
toast('No Vue component was found', 'warn')
})
bridge.on('set-instance-data', args => {
setStateValue(args)
flush()
})
// vuex
if (hook.store) {
initVuexBackend(hook, bridge, hook.store.commit === undefined)
} else {
hook.once('vuex:init', store => {
initVuexBackend(hook, bridge, store.commit === undefined)
})
}
hook.once('router:init', () => {
initRouterBackend(hook.Vue, bridge, rootInstances)
})
// events
initEventsBackend(Vue, bridge)
target.__VUE_DEVTOOLS_INSPECT__ = inspectInstance
// User project devtools config
if (target.hasOwnProperty('VUE_DEVTOOLS_CONFIG')) {
const config = target.VUE_DEVTOOLS_CONFIG
// Open in editor
if (config.hasOwnProperty('openInEditorHost')) {
SharedData.openInEditorHost = config.openInEditorHost
}
}
bridge.log('backend ready.')
bridge.send('ready', Vue.version)
bridge.on('log-detected-vue', () => {
console.log(
`%c vue-devtools %c Detected Vue v${Vue.version} %c`,
'background:#35495e ; padding: 1px; border-radius: 3px 0 0 3px; color: #fff',
'background:#41b883 ; padding: 1px; border-radius: 0 3px 3px 0; color: #fff',
'background:transparent'
)
})
setTimeout(() => {
scan()
// perf
initPerfBackend(Vue, bridge, instanceMap)
}, 0)
})
}
export function findInstanceOrVnode (id) {
if (/:functional:/.test(id)) {
const [refId] = id.split(':functional:')
const map = functionalVnodeMap.get(refId)
return map && map[id]
}
return instanceMap.get(id)
}
/**
* Scan the page for root level Vue instances.
*/
function scan () {
rootInstances.length = 0
let inFragment = false
let currentFragment = null
function processInstance (instance) {
if (instance) {
if (rootInstances.indexOf(instance.$root) === -1) {
instance = instance.$root
}
if (instance._isFragment) {
inFragment = true
currentFragment = instance
}
// respect Vue.config.devtools option
let baseVue = instance.constructor
while (baseVue.super) {
baseVue = baseVue.super
}
if (baseVue.config && baseVue.config.devtools) {
// give a unique id to root instance so we can
// 'namespace' its children
if (typeof instance.__VUE_DEVTOOLS_ROOT_UID__ === 'undefined') {
instance.__VUE_DEVTOOLS_ROOT_UID__ = ++rootUID
}
rootInstances.push(instance)
}
return true
}
}
if (isBrowser) {
walk(document, function (node) {
if (inFragment) {
if (node === currentFragment._fragmentEnd) {
inFragment = false
currentFragment = null
}
return true
}
let instance = node.__vue__
return processInstance(instance)
})
} else {
if (Array.isArray(target.__VUE_ROOT_INSTANCES__)) {
target.__VUE_ROOT_INSTANCES__.map(processInstance)
}
}
hook.emit('router:init')
flush()
}
/**
* DOM walk helper
*
* @param {NodeList} nodes
* @param {Function} fn
*/
function walk (node, fn) {
if (node.childNodes) {
for (let i = 0, l = node.childNodes.length; i < l; i++) {
const child = node.childNodes[i]
const stop = fn(child)
if (!stop) {
walk(child, fn)
}
}
}
// also walk shadow DOM
if (node.shadowRoot) {
walk(node.shadowRoot, fn)
}
}
/**
* Called on every Vue.js batcher flush cycle.
* Capture current component tree structure and the state
* of the current inspected instance (if present) and
* send it to the devtools.
*/
function flush () {
let start
functionalIds.clear()
captureIds.clear()
if (process.env.NODE_ENV !== 'production') {
captureCount = 0
start = isBrowser ? window.performance.now() : 0
}
const payload = stringify({
inspectedInstance: getInstanceDetails(currentInspectedId),
instances: findQualifiedChildrenFromList(rootInstances)
})
if (process.env.NODE_ENV !== 'production') {
console.log(`[flush] serialized ${captureCount} instances${isBrowser ? `, took ${window.performance.now() - start}ms.` : ''}.`)
}
bridge.send('flush', payload)
}
/**
* Iterate through an array of instances and flatten it into
* an array of qualified instances. This is a depth-first
* traversal - e.g. if an instance is not matched, we will
* recursively go deeper until a qualified child is found.
*
* @param {Array} instances
* @return {Array}
*/
function findQualifiedChildrenFromList (instances) {
instances = instances
.filter(child => !child._isBeingDestroyed)
return !filter
? instances.map(capture)
: Array.prototype.concat.apply([], instances.map(findQualifiedChildren))
}
/**
* Find qualified children from a single instance.
* If the instance itself is qualified, just return itself.
* This is ok because [].concat works in both cases.
*
* @param {Vue|Vnode} instance
* @return {Vue|Array}
*/
function findQualifiedChildren (instance) {
return isQualified(instance)
? capture(instance)
: findQualifiedChildrenFromList(instance.$children).concat(
instance._vnode && instance._vnode.children
// Find functional components in recursively in non-functional vnodes.
? flatten(instance._vnode.children.filter(child => !child.componentInstance).map(captureChild))
// Filter qualified children.
.filter(instance => isQualified(instance))
: []
)
}
/**
* Check if an instance is qualified.
*
* @param {Vue|Vnode} instance
* @return {Boolean}
*/
function isQualified (instance) {
const name = classify(instance.name || getInstanceName(instance)).toLowerCase()
return name.indexOf(filter) > -1
}
function flatten (items) {
return items.reduce((acc, item) => {
if (item instanceof Array) acc.push(...flatten(item))
else if (item) acc.push(item)
return acc
}, [])
}
function captureChild (child) {
if (child.fnContext && !child.componentInstance) {
return capture(child)
} else if (child.componentInstance) {
if (!child.componentInstance._isBeingDestroyed) return capture(child.componentInstance)
} else if (child.children) {
return flatten(child.children.map(captureChild))
}
}
/**
* Capture the meta information of an instance. (recursive)
*
* @param {Vue} instance
* @return {Object}
*/
function capture (instance, index, list) {
if (process.env.NODE_ENV !== 'production') {
captureCount++
}
if (instance.$options && instance.$options.abstract && instance._vnode && instance._vnode.componentInstance) {
instance = instance._vnode.componentInstance
}
// Functional component.
if (instance.fnContext && !instance.componentInstance) {
const contextUid = instance.fnContext.__VUE_DEVTOOLS_UID__
let id = functionalIds.get(contextUid)
if (id == null) {
id = 0
} else {
id++
}
functionalIds.set(contextUid, id)
const functionalId = contextUid + ':functional:' + id
markFunctional(functionalId, instance)
return {
id: functionalId,
functional: true,
name: getInstanceName(instance),
renderKey: getRenderKey(instance.key),
children: (instance.children ? instance.children.map(
child => child.fnContext
? captureChild(child)
: child.componentInstance
? capture(child.componentInstance)
: undefined
)
// router-view has both fnContext and componentInstance on vnode.
: instance.componentInstance ? [capture(instance.componentInstance)] : []).filter(Boolean),
inactive: false,
isFragment: false // TODO: Check what is it for.
}
}
// instance._uid is not reliable in devtools as there
// may be 2 roots with same _uid which causes unexpected
// behaviour
instance.__VUE_DEVTOOLS_UID__ = getUniqueId(instance)
// Dedupe
if (captureIds.has(instance.__VUE_DEVTOOLS_UID__)) {
return
} else {
captureIds.set(instance.__VUE_DEVTOOLS_UID__, undefined)
}
mark(instance)
const name = getInstanceName(instance)
const ret = {
uid: instance._uid,
id: instance.__VUE_DEVTOOLS_UID__,
name,
renderKey: getRenderKey(instance.$vnode ? instance.$vnode['key'] : null),
inactive: !!instance._inactive,
isFragment: !!instance._isFragment,
children: instance.$children
.filter(child => !child._isBeingDestroyed)
.map(capture)
.filter(Boolean)
}
if (instance._vnode && instance._vnode.children) {
ret.children = ret.children.concat(
flatten(instance._vnode.children.map(captureChild))
.filter(Boolean)
)
}
// record screen position to ensure correct ordering
if ((!list || list.length > 1) && !instance._inactive) {
const rect = getInstanceOrVnodeRect(instance)
ret.top = rect ? rect.top : Infinity
} else {
ret.top = Infinity
}
// check if instance is available in console
const consoleId = consoleBoundInstances.indexOf(instance.__VUE_DEVTOOLS_UID__)
ret.consoleId = consoleId > -1 ? '$vm' + consoleId : null
// check router view
const isRouterView2 = instance.$vnode && instance.$vnode.data.routerView
if (instance._routerView || isRouterView2) {
ret.isRouterView = true
if (!instance._inactive && instance.$route) {
const matched = instance.$route.matched
const depth = isRouterView2
? instance.$vnode.data.routerViewDepth
: instance._routerView.depth
ret.matchedRouteSegment =
matched &&
matched[depth] &&
(isRouterView2 ? matched[depth].path : matched[depth].handler.path)
}
}
return ret
}
/**
* Mark an instance as captured and store it in the instance map.
*
* @param {Vue} instance
*/
function mark (instance) {
if (!instanceMap.has(instance.__VUE_DEVTOOLS_UID__)) {
instanceMap.set(instance.__VUE_DEVTOOLS_UID__, instance)
instance.$on('hook:beforeDestroy', function () {
instanceMap.delete(instance.__VUE_DEVTOOLS_UID__)
})
}
}
function markFunctional (id, vnode) {
const refId = vnode.fnContext.__VUE_DEVTOOLS_UID__
if (!functionalVnodeMap.has(refId)) {
functionalVnodeMap.set(refId, {})
vnode.fnContext.$on('hook:beforeDestroy', function () {
functionalVnodeMap.delete(refId)
})
}
functionalVnodeMap.get(refId)[id] = vnode
}
/**
* Get the detailed information of an inspected instance.
*
* @param {Number} id
*/
function getInstanceDetails (id) {
const instance = instanceMap.get(id)
if (!instance) {
const vnode = findInstanceOrVnode(id)
if (!vnode) return {}
const data = {
id,
name: getComponentName(vnode.fnOptions),
file: vnode.fnOptions.__file || null,
state: processProps({ $options: vnode.fnOptions, ...(vnode.devtoolsMeta && vnode.devtoolsMeta.renderContext.props) }),
functional: true
}
return data
} else {
const data = {
id: id,
name: getInstanceName(instance),
state: getInstanceState(instance)
}
let i
if ((i = instance.$vnode) && (i = i.componentOptions) && (i = i.Ctor) && (i = i.options)) {
data.file = i.__file || null
}
return data
}
}
function getInstanceState (instance) {
return processProps(instance).concat(
processState(instance),
processRefs(instance),
processComputed(instance),
processInjected(instance),
processRouteContext(instance),
processVuexGetters(instance),
processFirebaseBindings(instance),
processObservables(instance),
processAttrs(instance)
)
}
export function getCustomInstanceDetails (instance) {
const state = getInstanceState(instance)
return {
_custom: {
type: 'component',
id: instance.__VUE_DEVTOOLS_UID__,
display: getInstanceName(instance),
tooltip: 'Component instance',
value: reduceStateList(state),
fields: {
abstract: true
}
}
}
}
export function reduceStateList (list) {
if (!list.length) {
return undefined
}
return list.reduce((map, item) => {
const key = item.type || 'data'
const obj = map[key] = map[key] || {}
obj[item.key] = item.value
return map
}, {})
}
/**
* Get the appropriate display name for an instance.
*
* @param {Vue} instance
* @return {String}
*/
export function getInstanceName (instance) {
const name = getComponentName(instance.$options || instance.fnOptions || {})
if (name) return name
return instance.$root === instance
? 'Root'
: 'Anonymous Component'
}
/**
* Process the props of an instance.
* Make sure return a plain object because window.postMessage()
* will throw an Error if the passed object contains Functions.
*
* @param {Vue} instance
* @return {Array}
*/
function processProps (instance) {
let props
if (isLegacy && (props = instance._props)) {
// 1.x
return Object.keys(props).map(key => {
const prop = props[key]
const options = prop.options
return {
type: 'props',
key: prop.path,
value: instance[prop.path],
meta: options ? {
type: options.type ? getPropType(options.type) : 'any',
required: !!options.required,
mode: propModes[prop.mode]
} : {}
}
})
} else if ((props = instance.$options.props)) {
// 2.0
const propsData = []
for (let key in props) {
const prop = props[key]
key = camelize(key)
propsData.push({
type: 'props',
key,
value: instance[key],
meta: prop ? {
type: prop.type ? getPropType(prop.type) : 'any',
required: !!prop.required
} : {
type: 'invalid'
},
editable: SharedData.editableProps
})
}
return propsData
} else {
return []
}
}
function processAttrs (instance) {
return Object.entries(instance.$attrs || {}).map(([key, value]) => {
return {
type: '$attrs',
key,
value
}
})
}
/**
* Convert prop type constructor to string.
*
* @param {Function} fn
*/
const fnTypeRE = /^(?:function|class) (\w+)/
function getPropType (type) {
const match = type.toString().match(fnTypeRE)
return typeof type === 'function'
? (match && match[1]) || 'any'
: 'any'
}
/**
* Process state, filtering out props and "clean" the result
* with a JSON dance. This removes functions which can cause
* errors during structured clone used by window.postMessage.
*
* @param {Vue} instance
* @return {Array}
*/
function processState (instance) {
const props = isLegacy
? instance._props
: instance.$options.props
const getters =
instance.$options.vuex &&
instance.$options.vuex.getters
return Object.keys(instance._data)
.filter(key => (
!(props && key in props) &&
!(getters && key in getters)
))
.map(key => ({
key,
value: instance._data[key],
editable: true
}))
}
/**
* Process refs
*
* @param {Vue} instance
* @return {Array}
*/
function processRefs (instance) {
return Object.keys(instance.$refs)
.filter(key => instance.$refs[key])
.map(key => getCustomRefDetails(instance, key, instance.$refs[key]))
}
/**
* Process the computed properties of an instance.
*
* @param {Vue} instance
* @return {Array}
*/
function processComputed (instance) {
const computed = []
const defs = instance.$options.computed || {}
// use for...in here because if 'computed' is not defined
// on component, computed properties will be placed in prototype
// and Object.keys does not include
// properties from object's prototype
for (const key in defs) {
const def = defs[key]
const type = typeof def === 'function' && def.vuex
? 'vuex bindings'
: 'computed'
// use try ... catch here because some computed properties may
// throw error during its evaluation
let computedProp = null
try {
computedProp = {
type,
key,
value: instance[key]
}
} catch (e) {
computedProp = {
type,
key,
value: '(error during evaluation)'
}
}
computed.push(computedProp)
}
return computed
}
/**
* Process Vuex getters.
*
* @param {Vue} instance
* @return {Array}
*/
function processInjected (instance) {
const injected = instance.$options.inject
if (injected) {
return Object.keys(injected).map(key => {
return {
key,
type: 'injected',
value: instance[key]
}
})
} else {
return []
}
}
/**
* Process possible vue-router $route context
*
* @param {Vue} instance
* @return {Array}
*/
function processRouteContext (instance) {
try {
const route = instance.$route
if (route) {
const { path, query, params } = route
const value = { path, query, params }
if (route.fullPath) value.fullPath = route.fullPath
if (route.hash) value.hash = route.hash
if (route.name) value.name = route.name
if (route.meta) value.meta = route.meta
return [{
key: '$route',
value: {
_custom: {
type: 'router',
abstract: true,
value
}
}
}]
}
} catch (e) {
// Invalid $router
}
return []
}
/**
* Process Vuex getters.
*
* @param {Vue} instance
* @return {Array}
*/
function processVuexGetters (instance) {
const getters =
instance.$options.vuex &&
instance.$options.vuex.getters
if (getters) {
return Object.keys(getters).map(key => {
return {
type: 'vuex getters',
key,
value: instance[key]
}
})
} else {
return []
}
}
/**
* Process Firebase bindings.
*
* @param {Vue} instance
* @return {Array}
*/
function processFirebaseBindings (instance) {
const refs = instance.$firebaseRefs
if (refs) {
return Object.keys(refs).map(key => {
return {
type: 'firebase bindings',
key,
value: instance[key]
}
})
} else {
return []
}
}
/**
* Process vue-rx observable bindings.
*
* @param {Vue} instance
* @return {Array}
*/
function processObservables (instance) {
const obs = instance.$observables
if (obs) {
return Object.keys(obs).map(key => {
return {
type: 'observables',
key,
value: instance[key]
}
})
} else {
return []
}
}
/**
* Sroll a node into view.
*
* @param {Vue} instance
*/
function scrollIntoView (instance) {
const rect = getInstanceOrVnodeRect(instance)
if (rect) {
// TODO: Handle this for non-browser environments.
window.scrollBy(0, rect.top + (rect.height - window.innerHeight) / 2)
}
}
/**
* Binds given instance in console as $vm0.
* For compatibility reasons it also binds it as $vm.
*
* @param {Vue} instance
*/
function bindToConsole (instance) {
if (!instance) return
if (!isBrowser) return
const id = instance.__VUE_DEVTOOLS_UID__
const index = consoleBoundInstances.indexOf(id)
if (index > -1) {
consoleBoundInstances.splice(index, 1)
} else {
consoleBoundInstances.pop()
}
consoleBoundInstances.unshift(id)
for (let i = 0; i < 5; i++) {
window['$vm' + i] = instanceMap.get(consoleBoundInstances[i])
}
window.$vm = instance
}
/**
* Returns a devtools unique id for instance.
* @param {Vue} instance
*/
function getUniqueId (instance) {
const rootVueId = instance.$root.__VUE_DEVTOOLS_ROOT_UID__
return `${rootVueId}:${instance._uid}`
}
function getRenderKey (value) {
if (value == null) return
const type = typeof value
if (type === 'number') {
return value
} else if (type === 'string') {
return `'${value}'`
} else if (Array.isArray(value)) {
return 'Array'
} else {
return 'Object'
}
}
/**
* Display a toast message.
* @param {any} message HTML content
*/
export function toast (message, type = 'normal') {
const fn = target.__VUE_DEVTOOLS_TOAST__
fn && fn(message, type)
}
export function inspectInstance (instance) {
const id = instance.__VUE_DEVTOOLS_UID__
id && bridge.send('inspect-instance', id)
}
function setStateValue ({ id, path, value, newKey, remove }) {
const instance = instanceMap.get(id)
if (instance) {
try {
let parsedValue
if (value) {
parsedValue = parse(value, true)
}
const api = isLegacy ? {
$set: hook.Vue.set,
$delete: hook.Vue.delete
} : instance
const data = has(instance._props, path, newKey)
? instance._props
: instance._data
set(data, path, parsedValue, (obj, field, value) => {
(remove || newKey) && api.$delete(obj, field)
!remove && api.$set(obj, newKey || field, value)
})
} catch (e) {
console.error(e)
}
}
}
function initRightClick () {
if (!isBrowser) return
// Start recording context menu when Vue is detected
// event if Vue devtools are not loaded yet
document.addEventListener('contextmenu', event => {
const el = event.target
if (el) {
// Search for parent that "is" a component instance
const instance = findRelatedComponent(el)
if (instance) {
window.__VUE_DEVTOOLS_CONTEXT_MENU_HAS_TARGET__ = true