边框动画

1632986389(1).png
image.png

<ul  v-loading="leftLoading" class="_left">
     <li v-for="item in data" :key="item.id">
        <div class="font">{{item.name}}</div>
      </li>
 </ul>

li{
      cursor:pointer;
      width: 80%;
      height: 70px;
      overflow: hidden;
      background: #000;
      color:#fff;
      position: relative;
      text-align:center;
      line-height: 70px;
      margin: 10px auto;
      .font{
        &::before {
          top: 15px;
          right: 5px;
          bottom: 15px;
          left: 5px;
          border-top: 1px solid #fff;
          border-bottom: 1px solid #fff;
          transform: scale(0,1);
          -webkit-transform-origin: 0 0;
          transform-origin: 0 0;
        }
        &::after {
          top: 5px;
          right: 15px;
          bottom: 5px;
          left: 15px;
          border-right: 1px solid #fff;
          border-left: 1px solid #fff;
          transform: scale(1,0);
          transform-origin: 100% 0;
        }
      }
    }
    li .font::before,  li .font::after {
      position: absolute;
      content: '';
      opacity: 0;
      transition: all 0.5s;
    }
    li:hover .font::before,  li:hover .font::after {
      opacity: 1;
      transform: scale(1);
      transition: all 0.5s;
    }