无图片,用css border实现尖三角

<!DOCTYPE HTML>
<html>
<head>
<meta charset="gbk" />
<style type="text/css">
    *{margin:0;padding:0;}
    body{background:#000;}
    .artItLaCorner {
        width:20px;
        border-color: transparent #fff;
        border-style: solid;
        border-width: 8px 7px 8px 0px;
        margin: 4px 0px 0px 0px;
    }
</style>
</head>
<body>
<div class="artItLaCorner"></div>
</body>
</html>

其他方向的根据自己需求去改变border-width

原文地址:https://www.cnblogs.com/afuge/p/3154944.html