伪元素给图片加蒙层
![](https://img2022.cnblogs.com/blog/2741132/202207/2741132-20220703171728153-1981127141.png)
.shadow::before{ content: "哈哈哈,我是遮罩"; position: absolute; top:0; left:0; width: 100%; height:100%; box-sizing: border-box; padding: 20px; background-color: rgba(0,0,0,.7); color:#fff; text-align: center; }
笨方法 :在图片同级加一个div。设置 position:ablolute。 width height 与图片大小一致
<div> <div class="shadow"></div> <img src="./img/pic1.png" /> </div>
.shadow{ position: absolute; width: 100%; height: 100%; opacity: 0.1; background: #333333; }