引入highlight.js和渲染样式css

引自Bootstrap的OPEN CND，国内访问快。

<script src="//cdn.bootcss.com/highlight.js/9.0.0/highlight.min.js"></script>
<link href="//cdn.bootcss.com/highlight.js/9.0.0/styles/vs.min.css" rel="stylesheet">

寻找代码高亮

highlight.js寻找当前html页面中的<pre><code></code></pre>进行渲染

<script >hljs.initHighlightingOnLoad();</script>


详见

highlightjs.org
www.bootcdn.cn/highlight.js
<!--
font-family:Consolas,"Helvetica Neue","Microsoft YaHei","Hiragino Sans GB";
-->