官网
https://cli.vuejs.org/zh/guide/有时组件模板的一部分逻辑上属于该组件，而从技术角度来看，最好将模板的这一部分移动到 DOM 中 Vue app 之外的其他位置。
案例
这两个组件都是在父元素里的，是父组件的子级，但是从技术角度来看，他们是应该是挂载在body下面的
未修改版
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue3</title>
<script src="./vue.js"></script>
</head>
<body>
<div id="hello-vue" class="box">
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<button @click="handleClick">点我显示子组件</button>
<cpn ref="compRef" @show-confirm="showConfirm"></cpn>
<confirm ref="confirmRef" @confirm="handleConfirm" @cancel="handleCancel" text="确定退出吗"></confirm>
</div>
<!--点击按钮后显示的那个组件-->
<template id="mycpn">
<transition name="list-fade">
<div class="cpnContainer" v-show="isshow" @click.stop="handleClose()">
<div class="inner-wrapper" @click.stop>
用到了transition
<div class="text">
<div>我是inner-text</div>
<div>我是inner-text</div>
<div>我是inner-text</div>
<div>我是inner-text</div>
<div>我是inner-text</div>
</div>
<div class="close" @click="handleClose()">close</div>
</div>
</div>
</transition>
</template>
<!--确认关闭confirm组件-->
<template id="confirm">
<transition name="confirm-fade">
<div v-show="isshow" class="confirm">
<div class="confirm-wrapper">
<div class="confirm-content">
<p>{{text}}</p>
<div class="btnContainer">
<button style="background-color: darkseagreen;margin-right: 40px" @click="confirm">{{confirmBtnText}}</button>
<button @click="cancel">{{cancelBtnText}}</button>
</div>
</div>
</div>
</div>
</transition>
</template>
<script>
const cpn = {
template: "#mycpn",
props: {},
data() {
return {
// bbb: 145612
isshow: false
}
},
methods: {
show() {
this.isshow = true
},
hide() {
// console.log("hide")
this.isshow = false
},
handleClose() {
// console.log("hide")
this.$emit("show-confirm")
},
}
}
const confirm = {
template: "#confirm",
props: {
text: {
type: String,
default: 'fdsafdasfdas'
},
confirmBtnText: {
type: String,
default: '确定'
},
cancelBtnText: {
type: String,
default: '取消'
}
},
data() {
return {
// bbb: 145612
isshow: false
}
},
methods: {
show() {
this.isshow = true
},
hide() {
this.isshow = false
// 控制子组件的显示
},
// 点击按钮后向父组件派发事件
confirm() {
this.hide();
this.$emit("confirm")
},
cancel() {
this.hide()
this.$emit('cancel')
}
}
}
const HelloVueApp = Vue.createApp({
data() {
return {
message: 'Hello Vue!!'
}
},
components: {
cpn,
confirm
},
methods: {
handleClick() {
// 父组件调用子组件的方法
// this.$refs.compRef.show()
this.$refs.compRef.show()
},
showConfirm() {
console.log("fdsa")
this.$refs.confirmRef.show()
},
// 点击取消或确定以后的逻辑
handleConfirm() {
this.$refs.compRef.hide()
},
handleCancel() {
}
}
}).mount("#hello-vue")
</script>
</body>
<style>
* {
font-size: 50px;
}
/*vue内置transition*/
.list-fade-enter-active, .list-fade-leave-active {
transition: opacity .3s;
}
.list-fade-enter-active .inner-wrapper, .list-fade-leave-active .inner-wrapper {
transition: all .3s;
}
.list-fade-enter-from, .list-fade-leave-to {
opacity: 0;
}
.list-fade-enter-from .inner-wrapper, .list-fade-leave-to .inner-wrapper {
transform: translate3d(0, 100%, 0);
}
/*子组件样式*/
.cpnContainer {
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: rgba(0, 0, 0, .3);
}
.inner-wrapper {
padding: 70px;
background-color: darkcyan;
position: fixed;
bottom: 0;
width: 100%;
box-sizing: border-box;
}
.close {
position: absolute;
top: 50px;
right: 50px;
}
/*confirm组件样式*/
.confirm {
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
background-color: rgba(0, 0, 0, 0.14);
}
.btnContainer {
padding: 0 70px;
}
.confirm-wrapper{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: 999;
box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);
}
.confirm-content{
overflow: hidden;
width: 600px;
border-radius: 13px;
background: white
}
.confirm-content p {
display: block;
padding-left: 40px;
}
/*.confirm-content {*/
/* border-radius: 8px;*/
/* box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);*/
/* position: absolute;*/
/* top: 50%;*/
/* left: 50%;*/
/* transform: translate(-50%, -50%);*/
/* !*p标签的margin top影响到了父元素 bfc*!*/
/* !*overflow: hidden;*!*/
/* background-color: white;*/
/*}*/
.confirm-content button {
border: 1px solid cornflowerblue;
background-color: transparent;
padding: 25px 50px;
margin-bottom: 30px;
border-radius: 5px;
}
.confirm-fade-enter-active ,.confirm-fade-leave-active{
transition: all .3s;
}
.confirm-fade-enter-from ,.confirm-fade-leave-to{
opacity: 0;
}
.confirm-fade-enter-active .confirm-content {
animation: confirm-zoom-in .3s;
transform-origin: center;
}
.confirm-fade-leave-active .confirm-content {
animation: confirm-zoom-out .3s;
transform-origin: center;
}
@keyframes confirm-zoom-in {
0% {
transform: scale(0);
}
60% {
transform: scale(1.1);
}
100% {
transform: scale(1);
}
}
@keyframes confirm-zoom-out {
0% {
transform: scale(1);
}
30% {
transform: scale(0.4);
}
100% {
transform: scale(0);
}
}
</style>
</html>
布局
修改版
布局
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue3</title>
<script src="./vue.js"></script>
</head>
<body>
<div id="hello-vue" class="box">
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<div>我是父组件</div>
<button @click="handleClick">点我显示子组件</button>
<cpn ref="compRef" @show-confirm="showConfirm"></cpn>
<confirm ref="confirmRef" @confirm="handleConfirm" @cancel="handleCancel" text="确定退出吗"></confirm>
</div>
<!--点击按钮后显示的那个组件-->
<template id="mycpn">
<teleport to="body">
<transition name="list-fade">
<div class="cpnContainer" v-show="isshow" @click.stop="handleClose()">
<div class="inner-wrapper" @click.stop>
用到了transition
<div class="text">
<div>我是inner-text</div>
<div>我是inner-text</div>
<div>我是inner-text</div>
<div>我是inner-text</div>
<div>我是inner-text</div>
</div>
<div class="close" @click="handleClose()">close</div>
</div>
</div>
</transition>
</teleport>
</template>
<!--确认关闭confirm组件-->
<template id="confirm">
<teleport to="body">
<transition name="confirm-fade">
<div v-show="isshow" class="confirm">
<div class="confirm-wrapper">
<div class="confirm-content">
<p>{{text}}</p>
<div class="btnContainer">
<button style="background-color: darkseagreen;margin-right: 40px" @click="confirm">{{confirmBtnText}}</button>
<button @click="cancel">{{cancelBtnText}}</button>
</div>
</div>
</div>
</div>
</transition>
</teleport>
</template>
<script>
const cpn = {
template: "#mycpn",
props: {},
data() {
return {
// bbb: 145612
isshow: false
}
},
methods: {
show() {
this.isshow = true
},
hide() {
// console.log("hide")
this.isshow = false
},
handleClose() {
// console.log("hide")
this.$emit("show-confirm")
},
}
}
const confirm = {
template: "#confirm",
props: {
text: {
type: String,
default: 'fdsafdasfdas'
},
confirmBtnText: {
type: String,
default: '确定'
},
cancelBtnText: {
type: String,
default: '取消'
}
},
data() {
return {
// bbb: 145612
isshow: false
}
},
methods: {
show() {
this.isshow = true
},
hide() {
this.isshow = false
// 控制子组件的显示
},
// 点击按钮后向父组件派发事件
confirm() {
this.hide();
this.$emit("confirm")
},
cancel() {
this.hide()
this.$emit('cancel')
}
}
}
const HelloVueApp = Vue.createApp({
data() {
return {
message: 'Hello Vue!!'
}
},
components: {
cpn,
confirm
},
methods: {
handleClick() {
// 父组件调用子组件的方法
// this.$refs.compRef.show()
this.$refs.compRef.show()
},
showConfirm() {
console.log("fdsa")
this.$refs.confirmRef.show()
},
// 点击取消或确定以后的逻辑
handleConfirm() {
this.$refs.compRef.hide()
},
handleCancel() {
}
}
}).mount("#hello-vue")
</script>
</body>
<style>
* {
font-size: 50px;
}
/*vue内置transition*/
.list-fade-enter-active, .list-fade-leave-active {
transition: opacity .3s;
}
.list-fade-enter-active .inner-wrapper, .list-fade-leave-active .inner-wrapper {
transition: all .3s;
}
.list-fade-enter-from, .list-fade-leave-to {
opacity: 0;
}
.list-fade-enter-from .inner-wrapper, .list-fade-leave-to .inner-wrapper {
transform: translate3d(0, 100%, 0);
}
/*子组件样式*/
.cpnContainer {
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: rgba(0, 0, 0, .3);
}
.inner-wrapper {
padding: 70px;
background-color: darkcyan;
position: fixed;
bottom: 0;
width: 100%;
box-sizing: border-box;
}
.close {
position: absolute;
top: 50px;
right: 50px;
}
/*confirm组件样式*/
.confirm {
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
background-color: rgba(0, 0, 0, 0.14);
}
.btnContainer {
padding: 0 70px;
}
.confirm-wrapper{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: 999;
box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);
}
.confirm-content{
overflow: hidden;
width: 600px;
border-radius: 13px;
background: white
}
.confirm-content p {
display: block;
padding-left: 40px;
}
/*.confirm-content {*/
/* border-radius: 8px;*/
/* box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);*/
/* position: absolute;*/
/* top: 50%;*/
/* left: 50%;*/
/* transform: translate(-50%, -50%);*/
/* !*p标签的margin top影响到了父元素 bfc*!*/
/* !*overflow: hidden;*!*/
/* background-color: white;*/
/*}*/
.confirm-content button {
border: 1px solid cornflowerblue;
background-color: transparent;
padding: 25px 50px;
margin-bottom: 30px;
border-radius: 5px;
}
.confirm-fade-enter-active ,.confirm-fade-leave-active{
transition: all .3s;
}
.confirm-fade-enter-from ,.confirm-fade-leave-to{
opacity: 0;
}
.confirm-fade-enter-active .confirm-content {
animation: confirm-zoom-in .3s;
transform-origin: center;
}
.confirm-fade-leave-active .confirm-content {
animation: confirm-zoom-out .3s;
transform-origin: center;
}
@keyframes confirm-zoom-in {
0% {
transform: scale(0);
}
60% {
transform: scale(1.1);
}
100% {
transform: scale(1);
}
}
@keyframes confirm-zoom-out {
0% {
transform: scale(1);
}
30% {
transform: scale(0.4);
}
100% {
transform: scale(0);
}
}
</style>
</html>
