效果如图所示:
css伪类实现矩形按钮的右边缘中间有一个往里凹陷的小半圆 使用css伪类:
<!DOCTYPE html>
<html>
<head>
<title>button</title>
<meta charset="utf-8" lang="gb23123">
<style type="text/css">
.btn{
width: px;
height: px;
color: #FFF;
font-size: em;
text-align: center;
line-height: px;
background-color: black;
top:%;
left: %;
margin-top: -px;
margin-left: -px;
position: absolute;
}
.btn::after{
width: px;
height: px;
content: "";
right: -px;
top: px;
position: absolute;
display: block;
background: #FFF;
border-radius: px;
}
</style>
</head>
<body>
<buton class="btn">button</buton>
</body>
</html>