web前端绘制八卦图_超简单教程

web前端中我们可以使用CSS去绘制各种形状的八卦图，我们既可以通过Canvas来进行绘制，也可以使用Css来进行绘制，今天给大家带来的就是使用Css来进行图形的绘制，这里我们使用了SetTImeOut来对样式进行了一个动画的显示，看上去特别的亮眼，下面就是关于这个星图的源码了：

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>web前端绘制八卦图_超简单教程</title>
<style id="style">
*{ margin: 0; padding: 0; }
body{ background: #f1f1f1; }
#box{ position: relative; width: 310px; height: 160px; margin: -160px auto 0; background: #fff; border-width: 150px 0 0 0;transition: .7s; }
#box:before{ content: ""; position: absolute; top: -75px; left: 0; width: 15px; height: 15px; transition: .7s; }
#box:after{ content: ""; position: absolute; top: -75px; right: 0; width: 15px; height: 15px; transition: .7s; }
</style>
</head>
<body>
<div id="box"></div>
<script>
var oStyle = document.getElementById('style');
var oBox = document.getElementById('box');
var timer = setTimeout(function(){
oBox.style.cssText += 'margin-top:50px;';
setTimeout(function(){
oBox.style.cssText += 'border-style:solid;border-color:#000;';
setTimeout(function(){
oBox.style.cssText += 'border-radius:50%;';
setTimeout(function(){
oStyle.innerHTML += '#box:before{background:#000;border:70px solid #fff;}';
setTimeout(function(){
oStyle.innerHTML += '#box:before{border-radius:50%;}';
setTimeout(function(){
oStyle.innerHTML += '#box:after{background:#fff;border:70px solid #000;}';
setTimeout(function(){
oStyle.innerHTML += '#box:after{border-radius:50%;}';
setTimeout(function(){
oStyle.innerHTML += '#box{animation: autoplay 2s infinite linear;}@keyframes autoplay{ form{ transform: rotate(0deg) } to{ transform: rotate(360deg) } }';
},500);
},500);
},500);
},500);
},1000);
},1000);
},1000);
},1000);
</script>
</body>
</html>