css实现缕空遮罩层的示例代码

本文内容:页面镂空遮罩层、页面镂空遮罩引导层、图片镂空遮罩

常规遮罩层

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">    <title>Title</title>    <style>        .mask{   position: absolute;   width: 100%;   height: 100%;   top: 0;   left: 0;   background: rgba(0,0,0,0.4);   display: flex;   justify-content: center;   align-items: center;   z-index: 3;  }  .mask{   position:fixed;      top     : 0;      left    : 0;      bottom  : 0;      right   : 0;      background:rgba(0,0,0,.5);       /*background:hsla(0,100%,80%,0.5)*/      /*background:#000; opacity:0.5; */  }  //模糊效果 毛玻璃效果  .blur{   -webkit-filter: blur(5px); /* Chrome, Opera */   -moz-filter: blur(5px);   -ms-filter: blur(5px);       filter: blur(5px);  }</style></head><style></style><body><div class=mask></div></body></html>

镂空遮罩层效果如图

使用box-shadow实现镂空遮罩引导层效果

优点:

圆角轻松实现; box-shadow 不会影响元素位置,定位只需要根据 content 的位置写。

缺点:阴影可视区域无法触发click事件,因此,当点击蒙层任意区域,无法隐藏。

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">    <title>Title</title>    <style>        .guide{      position: absolute;      z-index: 2;   top: 0px;      left: 50%;      transform: translateX(-50%);            width: 50px;      height: 50px;      border-radius: 50px;      border: 3px solid #2353FA;            box-shadow: 0px 0px 0px 1000px rgba(0,0,0,.75);      box-sizing: border-box;    }    </style></head><style></style><body><div class=guide></div></body></html>

使用border实现镂空遮罩引导层效果

缺点:代码量大

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">    <title>Title</title>    <style>     .guide{      position: absolute;      z-index: 2;      .opacityEle{        border: 700px solid rgba(0,0,0,0.75);        width: 50px;        height: 50px;        position: relative;        top: -700px;        left: -538px;        border-radius: 50%;        .ele{          width: 50px;          height: 50px;          border: 3px solid #0B6EFF;          border-radius: 25px;          box-sizing: border-box;        }      }    }    </style></head><style></style><body><div class=guide> <div class=opacityEle>  <div class=ele></div> </div></div></body></html>

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css实现缕空遮罩层的示例代码