Vue使用$attrs实现爷爷直接向孙组件传递数据

<--爷组件-->
<script setup>
import { ref } from 'vue';
import Father from './components/Father.vue'
const fatherStr = ref('这是爸爸的数据')
const childStr = ref('这是孙子的数据')
</script>
<template>
  <Father :fatherStr="fatherStr" :childStr='childStr'></Father>
</template>

<--父组件-->
<script setup>
import Child from './child.vue'
</script>
<template>
  <div>
    <p >father</p>
    <p>{{ $attrs.fatherStr }}</p>
    <Child v-bind="$attrs"></Child>
  </div>
</template>

<--孙组件-->
<script setup>
</script>
<template>
  <div>
    <p >child</p>
    <p>{{ $attrs.childStr }}</p>
  </div>
</template>

<--父组件-->
<script setup>
import Child from './child.vue'
const props = defineProps(['fatherStr'])
</script>

<template>
  <div>
    <p >father</p>
    <p>{{ fatherStr }}</p>
    <Child v-bind="$attrs"></Child>
  </div>
</template>

<style scoped>
</style>

<--孙组件-->
<script setup>
const props = defineProps(['childStr'])
</script>

<template>
  <div>
    <p >child</p>
    <p>{{ childStr }}</p>
  </div>
</template>

<style scoped>
</style>