CSS border 生成三角

时间：2023-03-09 08:14:18
CSS border 生成三角 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

<style>

div{ margin:20px 0 20px 20px;}

.a{width:0; height:0; line-height:0; border-width:10px 10px; border-style:solid; border-color:#ff3300 #ff3300 #ffffff #ffffff;}

.b{width:10px; height:10px; border:10px solid; border-color:#ff3300 #0000ff #339966 #00ff00;}

.c{width:10px; height:10px; border:10px solid; border-color:#ff3300 #ffffff #ffffff #ffffff;}

.d{width:0; height:0; border:10px solid; border-color:#ff3300 #ffffff #ffffff #ffffff;}

.e{width:0; height:0; border-width:20px 10px; border-style:solid; border-color:#ff3300 #ffffff #ffffff #ffffff;}

.f{width:0; height:0; line-height:0; border-width:20px 10px; border-style:solid; border-color:#ff3300 #ff3300 #ffffff #ffffff;}

</style>

</head>

<body>

<div class="a"></div>

<div class="b"></div>

<div class="c"></div>

<div class="d"></div>

<div class="e"></div>

<div class="f"></div>

</div>

</body>

</html>

效果图：矩形框中依次渐变演示了最上面的那个图形的形成过程

　　CSS border 生成三角

css模拟圆角（适合边框和背景一样的圆角，对精密程度要求不高的）

　　

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

<style>

/*div{ margin:20px 0 20px 20px;}*/

.box{width:500px;}

.top{border-bottom:3px solid; border-top-color:#cc0000; border-bottom-color:#cc0000; border-left:3px dotted transparent; border-right:3px dotted transparent;}

.center{padding:10px 20px; color:white; font-size:14px; background:#cc0000;}

.bot{border-top:3px solid; border-top-color:#cc0000; border-bottom-color:#cccccc; border-left:3px dotted transparent; border-right:3px dotted transparent;}

</style>

</head>

<body>

<div class="box">

    <div class="top"></div>

    <div class="center">我是一只小小鸟、小小鸟！</div>

    <div class="bot"></div>

</div>

</div>

</body>

</html>

效果图：

　    　CSS border 生成三角

把div的边距拉大后会看的更清楚哦

　　CSS border 生成三角

改进：

　　

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

<style>

.fl{ float:left;}

.box{width:400px; margin:200px auto;}

.box .right .top{border-bottom:3px solid; border-top-color:#cc0000; border-bottom-color:#cc0000; border-left:3px dotted transparent; border-right:3px dotted transparent;}

.box .right .center{padding:100px 20px; color:white; font-size:14px; background:#cc0000;}

.box .right .bot{border-top:3px solid; border-top-color:#cc0000; border-bottom-color:#cccccc; border-left:3px dotted transparent; border-right:3px dotted transparent;}

.box .left{ width:0; height:0; line-height:0; margin-top:20px;  border-top:10px solid white; border-right:20px solid #cc0000; border-bottom:10px solid white;  border-left:10px solid white;}

</style>

</head>

<body>

<div class="box">

    <div class="left fl"></div>

    <div class="right fl">

        <div class="top"></div>

            <div class="center">我是一只小小鸟、小小鸟！</div>

        <div class="bot"></div>

    </div>

    <div style="clear:both;"></div>

</div>

</div>

</body>

</html>

效果图：

　　CSS border 生成三角

原文地址：http://www.zhangxinxu.com/wordpress/?p=794

　　

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