vue移动端实现红包雨效果

<template>
  <div class="ser_home">
    <ul class="red_packet" id="red_packet">
      <template v-for="(item, index) in liParams">
        <li : 
 :class="item.cls" :data-index="index" @webkitAnimationEnd="removeDom">
          <a href='javascript:;'>
            <i :></i>
          </a>
        </li>
      </template>
    </ul>
  </div>
</template>


<script>
export default {
  data () {
    return {
      liParams: [],
      timer: null,
      duration: 10000 // 定义时间
    }
  },
  mounted () {
    this.startRedPacket()
  },
  methods: {
    /**
     * 开启动画
     */
    startRedPacket() {
      let win = document.documentElement.clientWidth || document.body.clientWidth
      let left = parseInt(Math.random() * (win - 50) + 0);
      
      let rotate = (parseInt(Math.random() * (45 - (-45)) - 45)) + "deg"; // 旋转角度
      let scales = (Math.random() * (12 - 8 + 1) + 8) * 0.1; // 图片尺寸
      let durTime = (Math.random() * (2.5 - 1.2 + 1) + 1.2) + 's'; // 时间 1.2和1.2这个数值保持一样
      console.log(durTime)
      this.liParams.push({left: left+'px', cls: 'move_1', transforms: 'rotate('+ rotate +') scale('+ scales +')', durTime: durTime})


      setTimeout( () => {  // 多少时间结束
        clearTimeout(this.timer)
        return;
      }, this.duration)


      this.timer = setTimeout( () => {
        this.startRedPacket()
      },100)  
    },
    /**
     * 回收dom节点
     */
    removeDom (e) {
      let target = e.currentTarget;
      document.querySelector('#red_packet').removeChild(target)
    }
  }
}
</script>


<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="scss">
.ser_home {
  width: 100%;
  height: 100%;
}
.red_packet {
  display: block;
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
  i {
    width: 48px;
    height: 69px;
    display: block;
    background: url('/hongbao.png') no-repeat;
  }
  li {
    position: absolute;
    animation: all 3s linear;
    top:-100px;
    z-index: 10;
    &.move_1 {
      -webkit-animation: aim_move 5s linear 1 forwards;
      animation: aim_move 5s linear 1 forwards;
    }
  }
  a {
    display: block;
  }
}


@keyframes aim_move {
   0% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
   }
   100% {
    -webkit-transform: translateY(120vh);
    transform: translateY(120vh);
   }
  }

</style>