react 简单轮播图实现

ul{
  padding: 0;
  margin: 0;
}
.swipper {
  width: 50%;
  background-color: #99a9bf;
  position: relative;
  overflow: hidden;
  .swipper-item {
    top:0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
    display: inline-block;
    text-align: center;
    background-color: #00965E
  }
  .btn-prev{
    position: absolute;
    top: 50%;
    left: 0;
    margin-top: -13px;
    width: 36px;
    height: 36px;
    z-index: 2;
  }
  .btn-next{
    position: absolute;
    top: 50%;
    right: 0;
    margin-top: -13px;
    width: 36px;
    height: 36px;
    z-index: 2;
  }
  .nav{
    position: absolute;
    bottom: 10px;
    z-index: 2;
    left: 50%;
    transform: translateX(-50%);
    .nav-item{
      display: inline-block;
      border-radius: 50%;
      background-color: #FFAC38;
      width: 10px;
      height: 10px;
      padding: 2px;
      opacity: .4;
      &:not(:last-child){
        margin-right: 5px;
      }
    }
    .is-active{
      opacity:1
    }
  }
}