教你怎么使用Vue实现动画效果（附代码）

<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 0.5s;
  }
  .fade-enter,
  .fade-leave-active {
    opacity: 0;
  }
</style>

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

<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;
}

<transition
  name="fade"
  @before-enter="beforeEnter"
  @enter="enter"
  @after-enter="afterEnter"
  @before-leave="beforeLeave"
  @leave="leave"
  @after-leave="afterLeave"
>
  <div v-show="show"></div>
</transition>
<script>
  export default {
    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";
      },
    },
  };
</script>

<!-- 翻转进场出场-->
<transition enter-active-class="flipInX" leave-active-class="flipOutX">
  <div v-show="show" class="animated"></div>
</transition>
<!-- 或者 -->
<transition
  enter-active-class="animated flipInX"
  leave-active-class="animated flipOutX"
>
  <div v-show="show"></div>
</transition>

<transition-group enter-active-class="flipInX" leave-active-class="flipOutX">
  <div v-show="show" :key="x" v-for="x in 5"></div>
</transition-group>