在上一节我们用animate动画库,在刷新页面时没有动画
如何解决第一次就显示动画内容呢?
在transform 上加上appear 和appear-active-class
<transition name='fade'
appear
enter-active-class='animated swing'
leave-active-class='animated flash'
appear-active-class='animated swing'>
<div v-if="cssanimate">hello css animate</div>
</transition>
<button @click='cssclick'>css动画</button>
这样在第一次加载时就会显示动画。
事实上,animate动画提供的是什么动画呢?就是@keyframes的这种CSS3的动画效果。
我们也可以在动画加上transition 过渡动画效果。
<transition
name='fade'
appear
type='transition'
enter-active-class='animated swing fade2-enter-active'
leave-active-class='animated flash fade2-leave-active'
appear-active-class='animated swing'>
<div v-if="cssanimate3">hello css animate3</div>
</transition>
<button @click='cssclick3'>css动画3</button>
在CSS中定义过渡动画:
<style>
.fade-enter,.fade-leave-to{
opacity:0;
}
.fade-enter-active,.fade-leave-active{
transition:opacity 3s;
}
</style>
transition加上type=‘transition’的原因是,transition的过渡时长可能是3s是自己定义的,但是animate默认的过渡时长为1s,所以会有冲突,type的作用是以谁的时长为总时长
当然我们也可以自己自定义时长。
<transition
name='fade'
appear
:duration ="5000"
// :duration ="{enter:5000,leave:10000}"
// 更复杂的定义时长
enter-active-class='animated swing fade2-enter-active'
leave-active-class='animated flash fade2-leave-active'
appear-active-class='animated swing'>
<div v-if="cssanimate3">hello css animate3</div>
</transition>
<button @click='cssclick3'>css动画3</button>
如此便实现动画和过渡的效果。