Vue中兄弟组件之间进行通信

1、先将组件1的数据传给父组件

//组件1中定义方法send()将数据传给父组件
send(){
   
  this.$emit('data-msg',this.message);
}
// 父组件通过定义事件响应获取组件1数据
@data-msg="msg2($event)"
msg2(message){
   
  console.log(message);
  this.msgbro2 = message;
}
-->

2、再将父组件的数据传给组件2

props属性获取父组件传入数据

props: {
   
      msgbro2: {
   
        type: String,
        default: ''
      }
    }

App.vue

<template>
  <div id="app">
    <brother1 @data-msg="msg2($event)"></brother1>
    <brother2  :msgbro2="msgbro2"></brother2>
  </div>
</template>

<script>
import Brother1 from "./components/Brother1";
import Brother2 from "./components/Brother2";

export default {
   
  name: 'app',
  data() {
   
    return {
   
      msgbro2:'',
    }
  },
  components: {
   
    Brother1,
    Brother2
  },
  methods: {
   
    msg2(message){
   
      console.log(message);
      this.msgbro2 = message;
    }
  }
}
</script>

<style>
#app {
   
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

Brother1.vue

<template>
  <div id="b1">
    <h2>我是组件1</h2>
    <button @click="send">点击我：将数据发送个Brother2组件</button>
  </div>
</template>

<script>
  export default {
   
    name: "Brother1",
    data(){
   
      return {
   
        message:'我是组件1数据',
      }
    },
    methods: {
   
      send(){
   
        this.$emit('data-msg',this.message);
      }
    }
  }
</script>

<style scoped>

</style>

Brother2.vue

<template>
  <div id="b2">
    <h2>我是组件2</h2>
    <p>{
   {
   msgbro2}}<p/>
  </div>
</template>

<script>
  export default {
   
    name: "Brother2",
    props: {
   
      msgbro2: {
   
        type: String,
        default: ''
      }
    }

  }
</script>

<style scoped>

</style>