I have a Vue2 component which contains an added eventListener i created on mounted
. I was wondering how do i properly remove this listener when the component is destroyed?
<template> <div> ... </div> </template> <script> export default { mounted() { window.addEventListener('click', (evt) => { this.handleClickEvent(evt) }) }, destroyed() { // window.removeEventListener('click', ????); }, methods: { handleClickEvent(evt) { // do stuff with (evt) }, }, } </script>
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Answer
You can use this.$el
for whole component and destroy event like you created it:
Vue.component('Child', { template: ` <div class="child"> click for event </div> `, mounted() { this.$el.addEventListener('click', (evt) => { this.handleClickEvent(evt) }) }, beforeDestroy() { console.log('distroyed') this.$el.removeEventListener('click', (evt) => { this.handleClickEvent(evt) }) }, methods: { handleClickEvent(evt) { console.log(evt.currentTarget) // do stuff with (evt) }, }, }) new Vue({ el: "#demo", data() { return { show: true } }, methods: { toggleShow() { this.show = !this.show } } })
.child { height: 150px; width: 200px; background: goldenrod; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script> <div id="demo"> <div> <button @click="toggleShow">mount/unmount component</button> <Child v-if="show" /> </div> </div>