How to implement component communication in vue-cli

This article mainly introduces the method of component communication in vue-cli. The editor thinks it is quite good. Now I will share it with you and give it as a reference. Let’s follow the editor and take a look.

This article introduces the method of component communication in vue-cli and shares it with everyone. The details are as follows:

There are three types of communication between vue components:

1. Parent component communicates with child component
2. Child component communicates with parent component
3. Same Communication between level components

1. Parent-to-child component communication

Take app.vue as the parent component, content. vue when a child component

1.Import the subcomponent in the parent component (subcomponent export)

import contents from './components/content';

2.Register the subcomponent in the parent component

data() { return { test:'0' }; }, components:{ 'v-header':headers, 'v-content':contents }

3.Subcomponent Receive data through props

2. Communication between child and parent component

Child component:

 methods: { down() { this.$emit('down','null'); //主动触发down方法，'null'为向父组件传递的数据 } }

Parent component:

  //监听子组件触发的down事件,然后调用changes方法 
 methods: { changes(msg) { this.test= test; } }

2. Non-parent-child component communication

//把a当作一个中转站 var a = new Vue();

Component 1 triggers:

 methods:{ eve(){ a.$emit("change",'null') } }

Component 2 receives:

 created(){ a.$on('change',()=>{ this.msg = 'null' }) }

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

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