注释很详细，直接上代码

上一篇

新增内容

1. 祖先组件向下传值
2. 子代组件接受数据

源码

App.vue

<template><div id="app"><sonComponent></sonComponent></div>
</template>
<script>javascript">
import sonComponent from "./components/sonComponents.vue";export default {name: "App",components: {sonComponent,},//温馨提醒，该属性不具备响应式//传递给后代的数据（这种方法无法直接使用data的数据）/*provide:{name:'代码对我眨眼睛111',age:18},*///传递给后代的数据（这种方法可以使用data的数据）//使用时需注意结构provide() {return{providedData: this.providedData,}},data() {return {name: "代码对我眨眼睛",age: 38};},computed:{ providedData() {return {name: this.name,age: this.age,};},},methods: {},
};
</script>
<style></style>

sonComponents.vue

<template><div><h1>子组件</h1><p>姓名：{{ providedData.name }}</p><grandsonComponent></grandsonComponent></div>
</template><script>javascript">
import grandsonComponent from "./grandsonComponents.vue";
export default {components: {grandsonComponent,},//注入父组件的name属性（即接收祖先组件传下来的数据）inject: ["providedData"],
};
</script><style lang="less" scoped></style>

grandsonComponents.vue

<template><div><h3>孙组件</h3><p>年龄：{{providedData.age}}</p></div>
</template><script>javascript">export default {// 注入父组件的属性inject:["providedData"]}
</script><style lang="less" scoped></style>

效果演示