vue中使用transition动画

一、淡入淡出动画效果

二、代码实现

注意事项：要保证key的唯一性

<template>
  <div class="beenDone">
    <transition name="slide-fade">
      <div
        :class="sumShow === true ? `box_echart` : `box_tree`"
        :key="keyNum"
      ></div>
    </transition>
  </div>
</template>

<script>
export default {
  data() {
    return {
      sumShow: true,
      keyNum: 1,
    };
  },
  mounted() {
    setInterval(() => {
      this.sumShow = !this.sumShow;
      this.keyNum = Date.parse(new Date())
    }, 3000);
  },
};
</script>

<style lang="less" scoped>
.beenDone {
  border: 1px solid #ccc;
  border-radius: 5px;
  width: 440px;
  height: 400px;
  overflow: hidden;
  .box_echart {
    background: url("../images/box_echart.svg") no-repeat;
    background-size: 100% 100%;
    width: 440px;
    height: 400px;
  }

  .box_tree {
    background: url("../images/box_tree.svg") no-repeat;
    background-size: 100% 100%;
    width: 440px;
    height: 400px;
  }
    .slide-fade-enter-active {
    transition: all 0.5s cubic-bezier(1, 0.5, 0.8, 1);
  }
  .slide-fade-leave-active {
    transition: all 0.5s cubic-bezier(1, 0.5, 0.8, 1);
  }
  .slide-fade-enter,
  .slide-fade-leave-to {
    opacity: 0;
  }
 
}
</style>

三、上下切换动画效果

四、代码，只需要将上面的css里面重复样式替换如下

 .slide-fade-enter-active {
    transition: all 0.5s ease;
  }
  .slide-fade-leave-active {
    transition: all 0.5s ease;
  }
  .slide-fade-enter,
  .slide-fade-leave-to {
    transform: translateY(10%);
    opacity: 0;
  }

五、如果有左右切换，只需要改变 translateX即可