vue组件间通信解析

组件间通信(父子,兄弟)

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父组件传子组件

父传子方法(一) 属性传递 props

//子组件

<template>

<ul>

<li v-for="item in dataList">{{item}}</li>

</ul>

</template>

<script>

export default {

props : { dataList : [] }

}

</script>

//父组件

<template>

<component-child v-bind:data-list="dataList"> </component-child>

<input v-model="dataInput" v-on:keyup.13="addDataItem()" ></input>

</template>

<script>

import ComponentChild from './child.vue'

export default {

data () {

return {

dataInput: "",

dataList : [ 'hello world!','welcome to use vue.js' ]

}

},

components : { ComponentChild },

methods : {

addDataItem () {

let self = this

if( !(self.dataInput && self.dataInput.length > 0) ) { return }

self.dataList.push( self.dataInput )

self.dataInput = ""

}

}

}

</script>

父传子方法(二) 广播事件传递 vm.$broadcast

//子组件

<template>

<ul>

<li v-for="item in dataList">{{item}}</li>

</ul>

</template>

<script>

export default {

data () {

return {

dataList : [ 'hello world!', 'welcome to use vue.js' ]

}

},

events : {

addChildDataEvent : function ( dataInput ) {

this.dataList.push( dataInput )

}

}

}

</script>

//父组件

<template>

<component-child></component-child>

<input v-model="dataInput" v-on:keyup.13="addDataItem()" ></input>

</template>

<script>

import ComponentChild from './child.vue'

export default {

data () {

return { dataInput: "" }

},

components : { ComponentChild },

methods : {

addDataItem () {

let self = this

if( !(self.dataInput && self.dataInput.length > 0) ) { return }

//广播到子组件

self.$broadcast( 'addChildDataEvent', self.dataInput )

self.dataInput = "" }

}

}

</script>

子组件传父组件

子传父方法 派遣事件传递 vm.$dispatch

//子组件

<template>

<input v-model="dataInput" v-on:keyup.13="addDataItem()" ></input>

</template>

<script>

export default {

data () {

return {

dataInput: ""

}

},

methods : {

addDataItem () {

let self = this

if( !(self.dataInput && self.dataInput.length > 0) ) { return }

//派遣事件到父组件

self.$dispatch( 'addFatherDataEvent', self.dataInput )

self.dataInput = ""

}

}

}

</script>

//父组件

<template>

<ul>

<li v-for="item in dataList">{{item}}</li>

</ul>

<component-child></component-child>

</template>

<script>

import ComponentChild from './child.vue'

export default {

data () {

return {

dataList : [ 'hello world!', 'welcome to use vue.js' ]

}

},

components : { ComponentChild },

events : {

addFatherDataEvent : function ( dataInput ) {

this.dataList.push( dataInput )

}

}

}

</script>

兄弟组件互传

父组件代理传递 子(vm.dispatch )父 ( vm.broadcast )子 事件方法传递

<template>

<ul>

<li v-for="item in dataList">{{item}}</li>

</ul>

</template>

<script>

export default {

data () {

return {

dataList : [ 'hello world!', 'welcome to use vue.js' ]

}

},

events : {

addChildDataEvent : function ( dataInput ) {

this.dataList.push( dataInput )

}

}

}

</script>

<template>

<input v-model="dataInput" v-on:keyup.13="addDataItem()" ></input>

</template>

<script>

export default {

data () {

return { dataInput: "" }

},

methods : {

addDataItem () {

let self = this

if( !(self.dataInput && self.dataInput.length > 0) ) { return } //派遣事件到父组件

self.$dispatch( 'agentDataEvent', self.dataInput )

self.dataInput = ""

}

}

}

</script>

<template>

<component-child1></component-child1>

<component-child2></component-child2>

</template>

<script>

import ComponentChild1 from './child1.vue'

import ComponentChild2 from './child2.vue'

export default {

components : { ComponentChild1, ComponentChild2 },

events : {

agentDataEvent : function( dataInput ) {

this.$broadcast('addChildDataEvent', dataInput)

}

}

}

</script>

实例间通信

把实例当做参数传入另一个实例

<template>

<div>

<p>实例间通信</p>

<ul>

<li v-for="item in dataList">{{item}}</li>

</ul>

</div>

</template>

<script>

export default {

data () {

return {

dataList : [ 'hello world!', 'welcome to use vue.js' ]

}

},

events : {

addDataEvent : function ( dataInput ) {

this.dataList.push( dataInput )

}

}

}

</script>

<template>

<input v-model="dataInput" v-on:keyup.13="addDataItem()" ></input>

</template>

<script>

export default {

data () {

return {

dataInput: "",

otherApp : {}

}

},

methods : {

addDataItem ( ) {

let self = this

if( !(self.dataInput && self.dataInput.length > 0) ) { return } //触发其他实例事件

self.otherApp.$emit( 'addDataEvent', self.dataInput )

self.dataInput = ""

},

setOtherApp ( app ) {

this.otherApp = app

}

}

}

</script>

import Vue from "vue"

import App1 from "./communication5/app1.vue"

import App2 from "./communication5/app2.vue"

let AppVM1 = new Vue( App1 ).$mount('#app')

let AppVM2 = new Vue( App2 ).$mount('#app2')

AppVM2.setOtherApp( AppVM1 )

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