How to implement communication in vue2.0?

This article mainly introduces the implementation code of vue2.0 sibling component (peer level) communication. It is very good and has reference value. Friends in need can refer to it

##1 , Foreplay

Let’s take a look at the first two articles:

Parent component is passed to child component

Sub component is passed to parent component

Look at the picture, look at the picture, look at the picture! ! !

Personal understanding:

This is obviously like the younger brother calling the older brother in life. Both parties need mobile phones and signal transmission towers.

• Brother=> A component

• Brother=> B component

• Brother’s Mobile phone => $emit sends data

##Brother’s mobile phone=> $on monitors and receives data
Signal transmitting tower=> Intermediate event line
App.vue => Needless to say, everyone knows that it is the earth

2. Code2.1. Create a new intermediate event line ligature .js under src/asstes (note the suffix .js)

import Vue from 'Vue'
export default new Vue;

2.2. Create a new A.vue

under src/components

<template>
 <p>
 <h2>A组件</h2>
 <button v-on:click="spot">点一下就传</button>
 </p>
</template>
<script>
 import bus from &#39;../assets/ligature&#39;;
 export default {
 methods: {
 spot: function() {
 //监听A组件中的spot，并发送数据
 bus.$emit("spot", &#39; 没想到吧！！我是A组件&#39;)
 }
 }
 }
</script>

2.3. Create a new B.vue

<template>
 <p>
 <h2>B组件</h2>
 <p>结果:{{msg}}</p>
 </p>
</template>
<script>
 import bus from "../assets/ligature";
 export default {
 data() {
 return {
 msg: "这TMD是默认值除非你点一下上面的按钮"
 };
 },
 mounted() {
 var _this = this;
 //监听A组件中的spot，并接受数据
 bus.$on("spot", function(msg) {
 _this.msg = msg;
 });
 }
 };
</script>
<style>
p{
 font-size: 20px;
 color: darkcyan;
}
</style>

in src/components 2.4. Modify App.vue (Earth), register these two components, and add the labels of these two components

<template>
 <p id="app">
 <A/>
 <hr>
 <B/>
 </p>
</template>
<script>
import A from &#39;./components/A&#39;
import B from &#39;./components/B&#39;
export default {
 name: &#39;App&#39;,
 components: {
 A,
 B
 }
}
</script>

3. Effect

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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