2021-07-13 vue-transition动画

vue-transition动画

官网API: https://cn.vuejs.org/v2/guide/transitions.html

demo点击显示与消失

<div id="demo">
  <button v-on:click="show = !show"> Toggle </button>
  <transition name="fade">
    <p v-if="show">hello</p>
  </transition>
</div>
<script>
new Vue({
  el: '#demo',
  data: {
    show: true 
  }
}) 
</script>
<style> 
.fade-enter-active, .fade-leave-active {
  transition: opacity .5s
}
.fade-enter, .fade-leave-active {
  opacity: 0 } 
</style>

一、transition使用

<transition name="fade"> 
  运动东西(元素，属性、路由....) 
</transition>

class定义：

.fade-enter{ } 进入过渡的开始状态，元素被插入时生效，只应用一帧后立即删除；(运动的初始状态)

.fade-enter-active{ } 进入过渡的结束状态，元素被插入时就生效，在 transition/animation 完成之后移除。这个类可以被用来定义过渡的过程时间，延迟和曲线函数。

.fade-leave{ } 离开过渡的开始状态，元素被删除时触发，只应用一帧后立即删除；

.fade-leave-active{ } 离开过渡的结束状态，元素被删除时生效，在 transition/animation 完成之后移除。这个类可以被用来定义过渡的过程时间，延迟和曲线函数。

image

二、自定义过度类名

默认的.fade-enter变成.fade-in-enter;

默认的.fade-enter-active变成.fade-in-active;

默认的.fade-leave变成.fade-out-enter;

默认的.fade-leave-active变成.fade-out-active;

<transition name="fade" 
enter-class="fade-in-enter" 
enter-active-class="fade-in-active" 
leave-class="fade-out-enter" 
leave-active-class="fade-out-active">
    <p v-show="show">hello</p>
</transition>

.fade-in-active, .fade-out-active{ 
  transition: all 0.5s ease 
}
 .fade-in-enter, .fade-out-active{ 
  opacity: 0 
}

三、transition相关函数

<transition name="fade" 
@before-enter="beforeEnter"
 @enter="enter" 
@after-enter="afterEnter" 
@before-leave="beforeLeave" 
@leave="leave" 
@after-leave="afterLeave">
    <p v-show="show"></p>
</transition>

methods:{
    beforeEnter(el){
        console.log('动画enter之前');
    },
    enter(el){
        console.log('动画enter进入');
    },
    afterEnter(el){
        console.log('动画进入之后');
        el.style.background="blue";
    },
    beforeLeave(el){
        console.log('动画leave之前');
    },
    leave(el){
        console.log('动画leave');
    },
    afterLeave(el){
        console.log('动画leave之后');
        el.style.background="red";
    }
}

四、transition结合animate.css使用。

<transition enter-active-class="zoomInLeft" leave-active-class="zoomOutRight">
        <p v-show="show" class="animated"></p>
</transition> 或者 <transition enter-active-class="animated zoomInLeft" leave-active-class="animated zoomOutRight">
        <p v-show="show"></p>
</transition>

五、多个元素运动

<transition-group enter-active-class="zoomInLeft" leave-active-class="zoomOutRight">
      <p v-show="show" :key=""></p>
      <p v-show="show" :key=""></p>
</transition-group>