安装消息订阅与发布安装包

npm i pubSub-js --save

消息发布

<template>
  <div class="school">
    <h4>大学名称是：{{ schoolName }}</h4><el-button @click="sendSchoolName(schoolName)">发送</el-button>
  </div>
</template>

<script>
import pubSub from 'pubsub-js'
export default {
  name: 'School',
  data () {
    return {
      schoolName: 'XXX大学'
    }
  },
  methods: {
    sendSchoolName (val) {
      pubSub.publish('getSchoolName', val)
    }
  }
}
</script>

消息订阅

<template>
  <div class="student">
    <h4>我的名字是{{ name }},我今年{{ age }}岁<span v-if="schoolName">我是{{ schoolName}}的学生</span> </h4>
  </div>
</template>

<script>
import pubSub from 'pubsub-js'
export default {
  name: 'Student',
  data () {
    return {
      name: 'Tom',
      age: 18,
      schoolName: ''
    }
  },
  mounted () {
    this.getSchoolName()
  },
  methods: {
    getSchoolName () {
     // 接收事件
      this.pubSubId = pubSub.subscribe('getSchoolName', (masName, data) => {
        this.schoolName = data
      })
    }
  },
  beforeDestroy () {
    pubSub.unsubscribe(this.pubSubId)
  }
}
</script>