css画三角形

在这里插入图片描述

<!doctype html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport"content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>css画三角形</title><style>/*向上*/.triangle_border_up {width: 0;height: 0;border-width: 0 30px 30px;border-style: solid;border-color: transparent transparent #67C23A;/*透明 透明  灰*/margin: 40px auto;position: relative;}.triangle_border_up span {display: block;width: 0;height: 0;border-width: 0 28px 28px;border-style: solid;border-color: transparent transparent #409EFF;/*透明 透明  黄*/position: absolute;top: 0px;left: 0px;}/*向下*/.triangle_border_down {width: 0;height: 0;border-width: 30px 30px 0;border-style: solid;border-color: #67C23A transparent transparent;/*灰 透明 透明 */margin: 40px auto;position: relative;}.triangle_border_down span {display: block;width: 0;height: 0;border-width: 28px 28px 0;border-style: solid;border-color: #409EFF transparent transparent;/*黄 透明 透明 */position: absolute;top: 0px;left: 0px;}/*向左*/.triangle_border_left {width: 0;height: 0;border-width: 30px 30px 30px 0;border-style: solid;border-color: transparent #67C23A transparent transparent;/*透明 灰 透明 透明 */margin: 40px auto;position: relative;}.triangle_border_left span {display: block;width: 0;height: 0;border-width: 28px 28px 28px 0;border-style: solid;border-color: transparent #409EFF transparent transparent;/*透明 黄 透明 透明 */position: absolute;top: 0px;left: 0px;}/*向右*/.triangle_border_right {width: 0;height: 0;border-width: 30px 0 30px 30px;border-style: solid;border-color: transparent transparent transparent #67C23A;/*透明 透明 透明 灰*/margin: 40px auto;position: relative;}.triangle_border_right span {display: block;width: 0;height: 0;border-width: 28px 0 28px 28px;border-style: solid;border-color: transparent transparent transparent #409EFF;/*透明 透明 透明 黄*/position: absolute;top: 0px;left: 0px;}</style>
</head><body><!-- 向上的三角形 --><div class="triangle_border_up"><span></span></div><!-- 向下的三角形 --><div class="triangle_border_down"><span></span></div><!-- 向左的三角形 --><div class="triangle_border_left"><span></span></div><!-- 向右的三角形 --><div class="triangle_border_right"><span></span></div>
</body></html>