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*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 >
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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 >
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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 >
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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 >
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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