实践
这里将通过四个实践小案例来体验和学习css过渡，css动画，javascript钩子，列表过渡的应用。至于案例用到的知识点就请自行学习官网文档。
1.css过渡–实践
先来看看demo效果：
这个案例其实很简单，通过一个transition来触发多个子元素的过渡效果，我们只需要定义元素对应的过渡效果就可以，其他事情vue会帮我们搞定，由此可以扩展出其他酷炫的过渡场景效果。先来看看这个简单案例的代码实现：
<template>
<div class="app">
<button @click="showMenu" class="btn">{{text}}</button>
<transition name="move">
<div class="menu" v-show="show">
<div class="inner inner-1">1</div>
<div class="inner inner-2">2</div>
<div class="inner inner-3">3</div>
</div>
</transition>
</div>
</template><script type="text/ecmascript-6">
export default {
data () {
return {
show: false
};
},
methods: {
showMenu () {
this.show = !this.show;
}
},
computed: {
text () {
return this.show ? '收' : '开';
}
}
};
</script>
<style lang="stylus" rel="stylesheet/stylus">
.app
.btn
position: fixed
bottom: 50px
right: 10px
z-index: 10
width: 50px
height: 50px
line-height: 50px
border-radius: 50%
border: none
outline: none
color: #fff
font-size: 18px
background: blue
.menu
position: fixed
bottom: 50px
right: 10px
width: 50px
height: 50px
border-radius: 50%
transition: all .7s ease-in
&.move-enter-active
.inner
transform: translate3d(0, 0, 0)
transition-timing-function: cubic-bezier(0, .57, .44, 1.97)
.inner-1
transition-delay: .1s
.inner-2
transition-delay: .2s
.inner-3
transition-delay: .3s
&.move-enter, &.move-leave-active
.inner
transition-timing-function: ease-in-out
.inner-1
transform: translate3d(0, 60px, 0)
transition-delay: .3s
.inner-2
transform: translate3d(40px, 40px, 0)
transition-delay: .2s
.inner-3
transform: translate3d(60px, 0, 0)
transition-delay: .1s
.inner
display: inline-block
position: absolute
width: 30px
height: 30px
line-height: 30px
border-radius: 50%
background: red
text-align: center
