Vue3父子通讯方式及Vue3插槽的使用方法详解
Nanchen_42 人气:0在Vue3中父子通讯方式
Vue3父传子(props)
父组件如下:
<template> <div class="about"> <h1>This is an about page</h1> <children :num="num" age="30"></children> </div> </template> <script> import children from "../components/children.vue"; import { ref } from "vue"; export default { setup() { let num = ref("《nanchen》"); return { num, }; }, components: { children, }, }; </script>
子组件如下:
<template> <div>我是子组件 我的父组件值为:{{ yy }}</div> </template> <script> import { ref } from "vue"; export default { name: "Vue3appChildren", props: { num: { type: Number, }, }, setup(props) { let yy = ref(props.num); return { yy, }; }, mounted() {}, methods: {}, }; </script> <style lang="scss" scoped> </style>
setup中的参数分别有:
props:值为对象,包含:组件外部传递过来,且组件内部声明接收了的属性。
context:上下文对象
attrs: 值为对象,包含:组件外部传递过来,但没有在props配置中声明的属性, 相当于 this.$attrs。
slots: 收到的插槽内容, 相当于 this.$slots。
emit: 分发自定义事件的函数, 相当于 this.$emit
props中可以接收父组件传递给子组件的参数
Vue3子传父({emit})
父组件:
<template> <div class="about"> <h1>This is an about page</h1> <children :num="num" age="30" @test="showHello"></children> </div> </template> <script> import children from "../components/children.vue"; import { ref } from "vue"; export default { setup() { let num = ref("《nanchen》"); function showHello(value) { console.log(value); } return { num, showHello, }; }, components: { children, }, }; </script>
子组件
<template> <div @click="aboutClick">我是子组件 我的父组件值为:{{ yy }}</div> </template> <script> import { ref } from "vue"; export default { name: "Vue3appChildren", props: { num: { type: Number, }, }, setup(props, { emit }) { let yy = ref(props.num); function aboutClick() { emit("test", "你好你好"); // 子传父 } return { yy, aboutClick, }; }, mounted() {}, methods: {}, }; </script> <style lang="scss" scoped> </style>
点击div效果如下:
Vue3插槽
<children :num="num" age="30" @test="showHello"> <h1>南辰,Hello</h1> </children>
<template> <div @click="aboutClick">我是子组件 我的父组件值为:{{ yy }}</div> <slot></slot> </template>
具名插槽的写法
<slot name="aabb"></slot>
<HelloWorld> <template v-slot:aabb> <span>NanChen,你好</span> </template> <!-- <template #aabb> <span>NanChen,你好</span> </template> --> </HelloWorld>
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