<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue中的动画封装</title>
<script src="js/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="app">
<fade :show="show">
<div>hello world</div>
</fade>
<fade :show="show">
<h1>hello world</h1>
</fade>
<button @click="handleBtnClick">Add</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 ='blue',
done()
},2000)
}
}
})
var count =0;
var vm =new Vue({
el:"#app",
data:{
show:false
},
methods:{
handleBtnClick:function () {
this.show=!this.show
}
}
})
</script>
</body>
</html>
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