vue3 Teleport瞬间移动函数的使用,供大家参考,具体内容如下
Teleport一般被翻译成瞬间移动组件,实际上是不好理解的.我把他理解成"独立组件"
他可以那你写的组件挂载到任何你想挂载的DOM上,所以是很自由很独立的
以一个例子来看:编写一个弹窗组件
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< template > < teleport to = "#modal" > < div id = "center" v-if = "isOpen" > < h2 >< slot >this is a modal</ slot ></ h2 > < button @ click = "buttonClick" >Close</ button > </ div > </ teleport > </ template > < script lang = "ts" > export default { props: { isOpen: Boolean, }, emits: { 'close-modal': null }, setup(props, context) { const buttonClick = () => { context.emit('close-modal') } return { buttonClick } } } </ script > < style > #center { width: 200px; height: 200px; border: 2px solid black; background: white; position: fixed; left: 50%; top: 50%; margin-left: -100px; margin-top: -100px; } </ style > |
在app.vue中使用的时候跟普通组件调用是一样的
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< template > < div id = "app" > < img alt = "Vue logo" src = "./assets/logo.png" > < HelloWorld msg = "Welcome to Your Vue.js App" /> < HooksDemo ></ HooksDemo > < button @ click = "openModal" >Open Modal</ button >< br /> < modal :isOpen = "modalIsOpen" @ close-modal = "onModalClose" > My Modal !!!!</ modal > </ div > </ template > < script > import HelloWorld from './components/HelloWorld.vue' import HooksDemo from './components/HooksDemo.vue' import Modal from './components/Modal.vue' import{ref} from 'vue' export default { name: 'App', components: { HelloWorld, HooksDemo, Modal }, setup() { const modalIsOpen = ref(false) const openModal = () => { modalIsOpen.value = true } const onModalClose = () => { modalIsOpen.value = false } return { modalIsOpen, openModal, onModalClose } } } </ script > < style > #app { font-family: Avenir, Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-align: center; color: #2c3e50; margin-top: 60px; } </ style > |
要是在app.vue文件中使用的时候,modal是在app的 DOM节点之下的,父节点的dom结构和css都会给modal产生影响
于是产生的问题
1.modal被包裹在其它组件之中,容易被干扰
2.样式也在其它组件中,容易变得非常混乱
Teleport 可以把modal组件渲染到任意你想渲染的外部Dom上,不必嵌套在#app中,这样就可以互不干扰了,可以把Teleport看成一个传送门,把你的组件传送到任何地方
使用的时候 to属性可以确定想要挂载的DOM节点下面
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< template > < teleport to = "#modal" > < div id = "center" > < h2 >柏特better</ h2 > </ div > </ teleport > </ template > |
在public文件夹下的index.html中增加一个节点
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "utf-8" > < meta http-equiv = "X-UA-Compatible" content = "IE=edge" > < meta name = "viewport" content = "width=device-width,initial-scale=1.0" > < link rel = "icon" href="<%= BASE_URL %>favicon.ico" > < title ><%= htmlWebpackPlugin.options.title %></ title > </ head > < body > < noscript > < strong >We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</ strong > </ noscript > < div id = "app" ></ div > < div id = "modal" ></ div > <!-- built files will be auto injected --> </ body > </ html > |
这样可以看到modal组件就是没有挂载在app下,不再受app组件的影响了
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/pz1021/article/details/114305022