利用CSS绘制三角形
本方法参考来源:https://www.jianshu.com/p/9a463d50e441
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>triangleCSS</title>
<style>
#triangle{
width: 0;
height: 0;
/*border其实是由三角形不断减小高度变为梯形而成的
平常宽度较小的border是对应三角形的底边
增大border宽度时这个特性将会明显*/
/*border-top: 50px solid blue;
border-right: 50px solid red;
border-bottom: 50px solid green;
border-left: 50px solid yellow;*/
/*单个三角形(但另外三边框对应的三角形仍占据空间)*/
/*border: 50px solid;
border-color: transparent transparent red;*/
/*尺寸最小化的三角形*/
border-width: 0 50px 50px;
border-style: solid;
border-color: transparent transparent red;
}
</style>
</head>
<body>
<div id="triangle"></div>
</body>
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