vue前端开发层次嵌套组件的通信详解

<template>
  <div>
    <P>这是A组件</P>
    <v-comb></v-comb>
  </div>
</template>
<script>
  import comB from '@/view/comB.vue'
  export default {
    name: 'comA',
    components: {
      'v-comb': comB
    },
    data() {
      return {
        msg: '我是组件A中数据'
      }
    },
    provide: function() { //注入给子组件属性和方法
      return {
        text: this.msg,
        getMethod: function() {
          console.log('执行根组件中的getMethod方法')
        }
      }
    }
  }
</script>

<template>
  <div>
    <div>
      <P>这是B组件</P>
      <v-comc></v-comc>
    </div>
  </div>
</template>
<script>
  import comC from '@/view/comC.vue'
  export default {
    name: 'comB',
    components: {
      'v-comc': comC
    }
  }
</script>

<template>
  <div style="border:1px solid orange;color:orange;">
    <div>
      <P>这是C组件</P>
      <div>{{text}}</div>
      <button @click="getMethod">调用父组件方法</button>
    </div>
  </div>
</template>
<script>
  export default {
    name: 'comC',
    inject: ['text', 'getMethod'] //text和getMethod是provide提供的名字
  }
</script>