<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="./vue.js"></script>
<style>
.v-enter,.v-leave-to{
opacity: 0;
}
.v-enter-active,.v-leave-active{
transition: opacity 1s;
}
</style>
</head>
<body>
<div id="root">
<fade :show="show">
<div v-if="show">miss you</div>
</fade>
<fade :show="show">
<h1 v-if="show">miss you</h1>
</fade>
<button @click="handle">toggle</button>
</div>
<script>
Vue.component('fade',{
props:['show'],
template:`
<transition @before-enter="handleBeforeEnter" @enter="handleEnter">
<slot v-if="show"></slot>
</transition>
`,
methods:{
handleBeforeEnter:function(el){
el.style.color = 'red'
},
handleEnter:function(el,done){
setTimeout(() =>{
el.style.color = 'green'
done()
},2000)
}
}
})
var vm = new Vue( {
el: "#root",
data: {
show: false
},
methods: {
handle: function() {
this.show = !this.show
},
}
})
</script>
</body>
</html>
vue动画封装
