前言：
如今你们对“向下箭头css”可能比较讲究，各位老铁们都需要知道一些“向下箭头css”的相关知识。那么小编也在网络上搜集了一些对于“向下箭头css””的相关内容，希望你们能喜欢，各位老铁们快快来学习一下吧！三角形
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><title>三角形</title><style type="text/css">body{ background-color: pink;}div{ width: 0px; height: 0px; border-top: 10px solid blue; border-right: 10px solid transparent; border-bottom: 10px solid transparent; border-left: 10px solid transparent; /* 唰(忽略不计) */ /* border-width: 10px; border-style: solid; border-color: green orange blue pink; */}</style></head><body><div></div></body></html>箭头
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><title>Document</title><style type="text/css">*{ margin: 0; padding: 0;}#bigBox{ width: 0; height: 0; border-top: 200px solid black; border-right: 200px solid transparent; border-bottom: 200px solid transparent; border-left: 200px solid transparent;}#smallBox{ width: 0; height: 0; border-top: 160px solid white; border-right: 160px solid transparent; border-bottom: 160px solid transparent; border-left: 160px solid transparent; position: absolute; left: 40px; top: 0;}</style></head><body><div id="bigBox"></div><div id="smallBox"></div></body></html>三角形使用案例：
<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title><style type="text/css">*{ margin: 0; padding: 0; list-style: none; line-height: 40px; cursor: pointer;}ul{ width: 200px; margin: 0 auto; border: 1px solid #000;}h3{ text-indent: 1em; background-color: dodgerblue; position: relative;}h3:before{ content: ""; width: 0; height: 0; border-top: 8px solid transparent; border-right: 8px solid transparent; border-bottom: 8px solid transparent; border-left: 8px solid #000; position: absolute; left: 5px; top: 12px;}h3.active:before{ border-top: 8px solid #000; border-left: 8px solid transparent; left: 0px; top: 15px;}</style></head><body><ul><li><h3>我的好友</h3></li><li><h3 class="active">企业好友</h3></li><li><h3>黑名单</h3></li></ul></body></html>制作箭头
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><title>Document</title><style type="text/css">*{ margin: 0; padding: 0;}#bigBox{ width: 0; height: 0; border-top: 200px solid black; border-right: 200px solid transparent; border-bottom: 200px solid transparent; border-left: 200px solid transparent;}#smallBox{ width: 0; height: 0; border-top: 160px solid white; border-right: 160px solid transparent; border-bottom: 160px solid transparent; border-left: 160px solid transparent; position: absolute; left: 40px; top: 0;}</style></head><body><div id="bigBox"></div><div id="smallBox"></div></body></html>实例: 实心箭头上下左右
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>实心箭头上下左右都有哦</title></head><body><style type="text/css">/* 向上的箭头 */.arrow-top { width: 0; height: 0; border-left: 10px solid transparent; border-right: 10px solid transparent; border-bottom: 10px solid #217AFF; font-size: 0; line-height: 0;}/* 向右的箭头 */.arrow-right { width: 0; height: 0; border-left: 10px solid #217AFF; border-right: 10px solid transparent; border-bottom: 10px solid transparent; font-size: 0; line-height: 0;}/* 向下的箭头 */.arrow-bottom { width: 0; height: 0; border-left: 4px solid transparent; /* 左边框的宽 */ border-right: 4px solid transparent; /* 右边框的宽 */ border-top: 7px solid #217AFF; /* 下边框的长度|高,以及背景色 */ font-size: 0; line-height: 0;}/* 向左的箭头 */.arrow-left { width: 0; height: 0; border-left: 10px solid transparent; border-right: 10px solid #217AFF; border-bottom: 10px solid transparent; font-size: 0; line-height: 0;}</style></head><body><div class="arrow"> <span class="arrow-top"></span> <span class="arrow-right"></span> <span class="arrow-bottom"></span><span class="arrow-left"></span> </div></body></html> 版权声明：
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