CSS中三角形在网页中比较常见，以前是图片，不过现在基本上都是通过CSS可以完成，实现比较简单，我们可以看一组简单的三角形效果:
其实实现起来比较简单，通过空div然后设置宽高为0，之后可以四周border的宽度，控制三角形的形状，四个border可以看成是两横横竖的木头的重叠的效果，两横在两竖上面，三角形就是中间重叠的部分切分出来的,样式的代码如下:
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.triangle { width: 0; height: 0; border-top: 20px solid #EEB422; border-right: 20px solid #C0FF3E; border-bottom: 20px solid #A020F0; border-left: 20px solid #7CFC00;}.triangle-up { width: 0; height: 0; border-right: 20px solid transparent; border-bottom: 40px solid #A020F0; border-left: 20px solid transparent;}.triangle-down { width: 0; height: 0; border-top: 40px solid #EEB422; border-right: 20px solid transparent; border-left: 20px solid transparent;}.triangle-left { width: 0; height: 0; border-top: 20px solid transparent; border-bottom: 20px solid transparent; border-left: 40px solid #7CFC00;}.triangle-right { width: 0; height: 0; border-top: 20px solid transparent; border-bottom: 20px solid transparent; border-right: 40px solid #C0FF3E;}.triangle-left-bottom { width: 0; height: 0; border-top: 40px solid transparent; border-left: 40px solid #7CFC00;}.triangle-right-bottom { width: 0; height: 0; border-top: 40px solid transparent; border-right: 40px solid #C0FF3E;} |
具体的html页面代码:
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<div class="row"> <span>四个三角</span> <div class="triangle"> </div></div><div class="row"> <span>上三角</span> <div class="triangle-up"> </div></div><div class="row"> <span>下三角</span> <div class="triangle-down"> </div></div><div class="row"> <span>左三角</span> <div class="triangle-left"> </div></div><div class="row"> <span>右三角</span> <div class="triangle-right"> </div></div><div class="row"> <span>左下角</span> <div class="triangle-left-bottom"> </div></div><div class="row"> <span>右下角</span> <div class="triangle-right-bottom"> </div></div> |
原文：http://www.cnblogs.com/wulibo/p/7132624.html