代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.contain
{
width: 100px;
height: 100px;
background: salmon;
}
.contain::after
{
position: absolute;
left: 75px;
top: -10px;
content: "";
display: block;
border: 10px solid transparent;
border-bottom-left-radius: 25%;
border-bottom-color:salmon;
}
</style>
</head>
<body>
<div class="contain">
[图片上传中...(伪元素制作小三角.png-862edc-1534857259128-0)]
</div>
</body>
</html>
效果展示
伪元素制作小三角.png
