html+css实现不规则边框

使用css的border实现不规则边框

    • html结构
    • css结构
    • 整体效果
    • 完整代码

html结构

 <div class="test">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </div>

css结构


    .test {
     
      width: 300px;
      height: 300px;
      background-color: springgreen;
      margin: 0 auto;
      box-shadow: inset 0px 0px 67px 37px #cccccc; /* 实现蒙蔽效果 */
      position: relative;
    }

    .test span:nth-child(1) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-top: 3px solid #00d3e7;
      border-left: 3px solid #00d3e7;
      position: absolute;
    }

    .test span:nth-child(2) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-top: 3px solid #00d3e7;
      border-right: 3px solid #00d3e7;
      position: absolute;
      right: 0;
      top: 0;
    }

    .test span:nth-child(3) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-left: 3px solid #00d3e7;
      border-bottom: 3px solid #00d3e7;
      position: absolute;
      left: 0;
      bottom: 0;
    }

    .test span:nth-child(4) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-right: 3px solid #00d3e7;
      border-bottom: 3px solid #00d3e7;
      position: absolute;
      right: 0;
      bottom: 0;
    }

    .test span:nth-child(4)::after {
     
      content: '';
      display: block;
      width: 50px;
      height: 50px;
      position: absolute;
      background-color: #fff;
      z-index: 10;
      border: 2px solid transparent;
      top: 26px;
      left: 26px;
      transform: rotate(45deg);
      border-left-color: yellow;

    }

整体效果

html+css实现不规则边框_第1张图片

完整代码

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
     
      margin: 0;
      padding: 0;

    }

    html,
    body {
     
      width: 100%;
      height: 100%;
    }

    section {
     
      width: 300px;
      height: 300px;
      background-color: blue;
      display: flex;
      justify-content: center;
      align-items: center;
      position: absolute;
      top: 50px;
      left: 50px;
    }

    .test {
     
      width: 300px;
      height: 300px;
      background-color: springgreen;
      margin: 0 auto;
      box-shadow: inset 0px 0px 67px 37px #cccccc;
      /* 实现蒙蔽效果 */
      position: relative;
    }

    .test span:nth-child(1) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-top: 3px solid #00d3e7;
      border-left: 3px solid #00d3e7;
      position: absolute;
    }

    .test span:nth-child(2) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-top: 3px solid #00d3e7;
      border-right: 3px solid #00d3e7;
      position: absolute;
      right: 0;
      top: 0;
    }

    .test span:nth-child(3) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-left: 3px solid #00d3e7;
      border-bottom: 3px solid #00d3e7;
      position: absolute;
      left: 0;
      bottom: 0;
    }

    .test span:nth-child(4) {
     
      display: block;
      width: 50px;
      height: 50px;
      border-right: 3px solid #00d3e7;
      border-bottom: 3px solid #00d3e7;
      position: absolute;
      right: 0;
      bottom: 0;
    }

    .test span:nth-child(4)::after {
     
      content: '';
      display: block;
      width: 50px;
      height: 50px;
      position: absolute;
      background-color: #fff;
      z-index: 10;
      border: 2px solid transparent;
      top: 26px;
      left: 26px;
      transform: rotate(45deg);
      border-left-color: yellow;

    }
  </style>
</head>

<body>
  <div class="test">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </div>
</body>

</html>

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