vue3中defineProps传值使用ref响应式失效详解

<template>
	<Son :data="data"/>
</template>
<script setup>
import { ref } from "Vue";
let data = ref('hello')
setTimeout(() => {
	data.value = 'how are you doing'
}, 2000)

</script>

<template>
	<div>{{ msg }}</div>
</template>
<script setup>
import { ref } from "vue";
// 接受来自父组件的传参
const props = defineProps({
  data: String,
});
const msg = ref(props.data);

</script>

<template>
	<div>{{ msg }}</div>
	<div>{{ data }}</div>
</template>
<script setup>
import { ref, toRefs, toRef } from "vue";
// 接受来自父组件的传参
const props = defineProps({
  data: String,
});
// 方法1：
const msg = toRef(props, 'data');
// 方法2：
const { data } = toRefs(props);

</script>