CSS 鼠标悬浮在图片上添加遮罩层效果的实现

<div class="img_div">
   <img src="item.image_base64" @click="deleteImg" class="imgCSS">
   <div class="mask">
     <h3><Icon type="ios-trash-outline" size="40"></Icon></h3>
   </div>
 </div>

.img_div {
    border-radius: 10px;
    display: block;
    position: relative;
  }
  .imgCSS {
    height: 100%;
    width: 100%;
    border-radius: 10px;
    display: block;
    cursor: pointer;
  }
   .mask {
   position: absolute;
   background: rgba(101, 101, 101, 0.6);
   color: #ffffff;
   opacity: 0;
   : 0;
   right: 0;
   width: 100%;
   height: 100%;
   border-radius: 10px;
   pointer-events:none;
 }
  .mask h3 {
    text-align: center;
    margin-: 25%;
  }
  .img_div:hover .mask {
    opacity: 1;
  }