定義：可以將組件的DOM元素直接傳送到某一位置進行展示。
- 使用場景：像 modals,toast 等這樣的元素，很多情況下，我們將它完全的和我們的 Vue 應用的 DOM 完全剝離，管理起來反而會方便容易很多
1、未使用teleport的時候
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>test</title>
<style>
.area {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
width: 200px;
height: 200px;
background: black;
}
.mask {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
background: green;
opacity: 0.5;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="root">
<div class="area">
<button @click="handleClick">按鈕</button>
<div class="mask" v-show="show"></div>
</div>
</div>
</body>
<script>
//自定義指令
const app = Vue.createApp({
data() {
return {
show: false
}
},
methods: {
handleClick() {
this.show = !this.show
}
},
});
const vm = app.mount('#root');
</script>
</html>
效果：蒙層在div內部
2、使用teleport的時候
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>test</title>
<style>
.area {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
width: 200px;
height: 200px;
background: black;
}
.mask {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
background: green;
opacity: 0.5;
}
</style>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="root">
<div class="area">
<button @click="handleClick">按鈕</button>
<teleport to='#mask'>
<div class="mask" v-show="show"></div>
</teleport>
</div>
</div>
<div id="mask"></div>
</body>
<script>
//自定義指令
const app = Vue.createApp({
data() {
return {
show: false
}
},
methods: {
handleClick() {
this.show = !this.show
}
},
});
const vm = app.mount('#root');
</script>
</html>
效果：
