话不多说直接上代码

<template>
  <div class="skeleton" :style="{ width, height }" :class="{ shan: animated }">
    <!-- 1 盒子-->
    <div class="block" :style="{ backgroundColor: bg }"></div>
    <!-- 2 闪效果keleton 伪元素 --->
  </div>
</template>
<script>
export default {
  name: 'Skeleton',
  // 使用的时候需要动态设置 高度，宽度，背景颜色，是否闪下
  props: {
    bg: {
      type: String,
      default: '#efefef'
    },
    width: {
      type: String,
      default: '100px'
    },
    height: {
      type: String,
      default: '100px'
    },
    animated: {
      type: Boolean,
      default: true
    }
  }
}
</script>
<style scoped lang="less">
.skeleton {
  display: inline-block;
  position: relative;
  overflow: hidden;
  vertical-align: middle;

  .block {
    width: 100%;
    height: 100%;
    border-radius: 2px;
  }
}

.shan {
  &::after {
    content: "";
    position: absolute;
    animation: shan 1.5s ease 0s infinite;
    top: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left,
        rgba(255, 255, 255, 0) 0,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%);
    transform: skewX(-45deg);
  }
}

@keyframes shan {
  0% {
    left: -100%;
  }

  100% {
    left: 120%;
  }
}
</style>