css中border属性的特殊用法(实现特殊形状)

css中border属性的特殊用法(实现特殊形状)

效果图如下：

HTML代码:

Example 1

Example 12

Example 3
JavaScript

CSS代码 :

.example1{
    height: 100px;
    width: 180px;
    border-top: 50px solid black;
    border-bottom: 50px solid wheat;
    border-right: 50px solid crimson;
    border-left: 50px solid crimson;
  }
  .example2{
    width: 150px;
    border-bottom: 100px solid wheat;
    border-right: 50px solid transparent;
    border-left: 50px solid transparent;
  }
  .tag {
    position: relative;
    background: #eee;
    border-radius: 3px 0 0 3px;
    color:#999;
    height: 26px;
    line-height: 26px;
    -webkit-transition: color 0.2s;
    padding: 0 20px 0 23px;
    text-decoration: none;
    display: inline-block;
  }
  .tag::before{
    content:'';
    position: absolute;
    top: 10px;
    left: 10px;
    width: 6px;
    height: 6px;
    border-radius: 3px;
    background: #fff;
  }
  .tag::after{
    content:'';
    position: absolute;
    right: 0px;
    top: 0px;
    background: #fff;
    border-top:13px solid transparent;
    border-bottom: 13px solid transparent;
    border-left: 10px solid #eee;
  }
  .tag:hover{
    background: crimson;
    color: white;
  }
  .tag:hover::after{
    border-left-color: crimson;
  }