Javascript的爷孙通信和组件自调用详解

<template>
  <div>
    <detail-list :list="categoryList"></detail-list>
  </div>
</template>
<script>
import DetailList from './detailList.vue'

export default {
  components: { DetailList },
  data () {
    return {
      categoryList: [
        {
          title: '1',
          children: [
            {
              title: '1-1'
            },
            {
              title: '1-2'
            },
          ]
        },
        {
          title: '2',
          children: [
            {
              title: '2-1'
            },
            {
              title: '2-2'
            },
          ]
        }
      ]
    }
  }
}
</script>

<template>
<template>
  <div>
    <!--递归组件的应用===》可以通过组件命名来自己使用自己的组件-->
    <div class="item" v-for="(item, index) in list" :key="index">
      <div class="item-title border-bottom">
        <span class="item-title-icon"></span>
        {{ item.title }}
      </div>
      <div v-if="item.children" class="item-children">
        <detail-list :list="item.children"></detail-list>
        <!-- //自己使用自己的组件detailList -->
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'DetailList', //组件命名
  props: {
    list: Array,
  },
  data() {
    return {}
  },
}
</script>

<template>
  <div>
    <detail-list :list="categoryList"></detail-list>
  </div>
</template>
<script>
import DetailList from './detailList.vue'

export default {
  components: { DetailList },
  data () {
    return {
      categoryList: [
        {
          title: '1',
          children: [
            {
              title: '1-1'
            },
            {
              title: '1-2'
            },
          ]
        },
        {
          title: '2',
          children: [
            {
              title: '2-1'
            },
            {
              title: '2-2'
            },
          ]
        }
      ]
    }
  }
}
</script>

<template>
<template>
  <div>
    <!--递归组件的应用===》可以通过组件命名来自己使用自己的组件-->
    <div class="item" v-for="(item, index) in list" :key="index">
      <div class="item-title border-bottom">
        <span class="item-title-icon"></span>
        {{ item.title }}
      </div>
      <div v-if="item.children" class="item-children">
        <detail-list :list="item.children"></detail-list>
        <!-- //自己使用自己的组件detailList -->
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'DetailList', //组件命名
  props: {
    list: Array,
  },
  data() {
    return {}
  },
}
</script>

<template>
  <div>
    🎈爷爷
    <br>
    <div>GrandSon的回复：{{reply}}</div>
    <father :msg1="msg1" :msg2="msg2" @getReply="getReply"></father>
  </div>
</template>
<script>
import Father from './father.vue'

export default {
  components: { Father },
  data () {
    return {
      msg1: '1️⃣我是GrandFather，把第二条传给GrandSon',
      msg2: '2️⃣GrandSon你好，我是GrandFather',
      reply: '' // 接收来自GrandSon的消息
    }
  },
  methods: {
    /* 将获得的数据绑定到data中，便于视图层渲染 */
    getReply (param) {
      this.reply = param
    }
  }
}
</script>