dom元素+CSS实现阶梯动画效果

1.效果

2.代码实现

<template>
  <div class="container">
    <div class="Box">
      <div class="box" style="background-color: red;"></div>
      <div class="box" style="background-color: orange;"></div>
      <div class="box" style="background-color: yellow;"></div>
      <div class="box" style="background-color: green;"></div>
      <div class="box" style="background-color: skyblue;"></div>
      <div class="box" style="background-color: blue;"></div>
    </div>
  </div>
</template>
<script>

export default {
  mounted () {
    this.setActions()
  },
  methods: {
    setActions () {
      //选中所有盒子
      const arr = document.querySelectorAll('.box')
 
 	  //循环添加事件监听
      arr.forEach(e => {
        e.addEventListener('mouseenter', () => {
          //通过添加类名实现盒子上移
          e.classList.add('boxMoveTwoStep')
          //判断前后的兄弟节点是否存在
          if (e.previousElementSibling) {//上一个节点
            e.previousElementSibling.classList.add('boxMoveOneStep')
          }
          if (e.nextElementSibling) {//下一个节点
            e.nextElementSibling.classList.add('boxMoveOneStep')
          }
        })
		//鼠标移除恢复盒子位置
        e.addEventListener('mouseleave', () => {
          e.classList.remove('boxMoveTwoStep')
          if (e.previousElementSibling) {
            e.previousElementSibling.classList.remove('boxMoveOneStep')
          }
          if (e.nextElementSibling) {
            e.nextElementSibling.classList.remove('boxMoveOneStep')
          }
        })
      })
    }
  }
}
</script>
<style lang='scss' scoped>
.container {
  width: 100%;
  height: 100%;
  overflow-y: hidden;
  position: relative;

  .Box {
    position: absolute;
    bottom: -50px;
    width: 100%;
    height: 100px;
  }

  .box {
    width: 50px;
    height: 100px;
    display: inline-block;
    background-color: pink;
    transition: 0.3s;
  }
}

.boxMoveOneStep {
  transform: translate(0px, -30px);
}

.boxMoveTwoStep {
  transform: translate(0px, -50px);
}
</style>