组件通信_props

父组件：Father.vue

<template>
  <div class="father">
    <h3>父组件</h3>
	<h4>汽车：{{ car }}</h4>
	<h4 v-show="toy">子给的玩具：{{ toy }}</h4>
	<Child :car="car" :sendToy="getToy"/>
  </div>
</template>

<script setup lang="ts" name="Father">
	import Child from './Child.vue'
	import { ref } from 'vue'
	//数据
	let car = ref('奔驰')
	let toy = ref('')
	//方法
	function getToy(value:string){
		toy.value = value
	}
</script>

<style scoped>
	.father{
		background-color:rgb(165, 164, 164);
		padding: 20px;
		border-radius: 10px;
	}
</style>

子组件：Child.vue

<template>
  <div class="child">
    <h3>子组件</h3>
	<h4>玩具：{{ toy }}</h4>
	<h4>父给的车：{{ car }}</h4>
	<button @click="sendToy(toy)">把玩具给父亲</button>
  </div>
</template>

<script setup lang="ts" name="Child">
	import { ref } from 'vue'
	//数据
	let toy = ref('奥特曼')
	//声明接受props
	defineProps(['car', 'sendToy'])
</script>

<style scoped>
	.child{
		background-color: skyblue;
		padding: 10px;
		box-shadow: 0 0 10px black;
		border-radius: 10px;
	}
</style>

效果展示：