mirror of https://github.com/vuejs/vue.git
52 lines
1.1 KiB
JavaScript
52 lines
1.1 KiB
JavaScript
var _ = require('../util')
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var templateParser = require('../parse/template')
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module.exports = {
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bind: function () {
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var el = this.el
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if (!el.__vue__) {
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this.ref = document.createComment('v-if')
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_.replace(el, this.ref)
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this.inserted = false
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if (el.tagName === 'TEMPLATE') {
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this.el = templateParser.parse(el, true)
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}
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} else {
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this.invalid = true
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_.warn(
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'v-if="' + this.expression + '" cannot be ' +
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'used on an already mounted instance.'
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)
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}
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},
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update: function (value) {
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if (this.invalid) return
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if (value) {
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if (!this.inserted) {
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if (!this.childVM) {
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this.childVM = this.vm.$addChild({
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el: this.el,
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inherit: true,
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_anonymous: true
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})
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}
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this.childVM.$before(this.ref)
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this.inserted = true
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}
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} else {
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if (this.inserted) {
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this.childVM.$remove()
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this.inserted = false
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}
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}
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},
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unbind: function () {
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if (this.childVM) {
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this.childVM.$destroy()
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}
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}
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} |