CSS實作關閉叉叉按鈕

按鈕參考 

<div className={'close-img-shade'}></div>      

.close-img-shade::before, .close-img-shade::after {
    content: '';
    position: absolute;
    height: 2px;
    width: 50px;
    top: 50%;
    left: 50%;
    //margin-top: -1px;
    background-color: #ff0000;
  }
  .close-img-shade::before {
    transform: rotate(45deg);
  }
  .close-img-shade::after {
    transform: rotate(-45deg);
  }