<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
<style>
.my-enter{
opacity:0;
transform:translateY(80px);
}
.my-leave-to{
opacity:0;
transform:translateY(80px);
}
.my-enter-active{
transition:all 0.4s ease;
}
.my-leave-active{
transition:all 0.4s ease;
}
</style>
</head>
<body>
<div id="app">
<transition name="my">
<h3 v-if="flag">{{msg}}</h3>
</transition>
<input type="button" value="切换" @click="change">
</div>
<script>
var vm=new Vue({
el:"#app",
data:{
msg:"我是一个H3",
flag:true
},
methods:{
change(){
this.flag=!this.flag;
}
}
})
</script>
</body>
</html>
