父组件代码:
<template>
<div>
<child-component :message="parentMessage"></child-component>
</div>
</template>
<script setup>
import ChildComponent from './ChildComponent.vue';
const parentMessage = '来自父组件的数据';
</script>
子组件代码:
<template>
<div>
<p>{{ message }}</p>
</div>
</template>
<script setup>
import { ref } from 'vue';
const message = ref('');
provide('message',message);
</script>