vue $emit $on 非父子非兄弟组件传值

bus.js   放置src根目录

import Vue from 'vue'
export default new Vue()

test1.vue   传值组件

<template>
<div>
  <button @click="add()">点击</button>
</div>
</template>

<script>
import Bus from '../bus.js'
export default {
  data () {
    return {
      msg: 'I come from first'
    }
  },
  methods: {
    add () {
      // 定义add方法，并将msg通过txt传给test2组件
      Bus.$emit('txt', this.msg)
      this.$router.push({name: 'test2'})
      this.msg = ''
    }
  }
}
</script>

<style scoped>

</style>

test2.vue  接收组件   console.log(_this.msg)   打印出test1   传过来的值

<template>
  <div>{{msg}}</div>
</template>

<script>
import Bus from '../bus.js'
export default {
  data () {
    return {
      foo: 'Foo component',
      msg: 'I come from second'
    }
  },
  mounted: function () {
    let _this = this
    Bus.$on('txt', function (msg) {
      _this.msg = msg
      console.log(_this.msg)
    })
  }
}
</script>

<style scoped>

</style>