网页实现代码示例的案例，页面展示代码高亮
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<pre class="prettyprint"><code class="language-javascript"><code class="javascript"><span class="hljs-tag" name="tag"><div </span><span class="hljs-keyword">class</span>=<span class="hljs-string">"hover-area area-Julia"</span><span class="hljs-tag" >></span>
<span class="hljs-tag" name="tag"><img <span class="hljs-keyword">src</span>=<span class="hljs-string">"imgs/21.jpg"</span> <span class="hljs-keyword">height</span>=<span class="hljs-string">"360"</span> <span class="hljs-keyword">width</span>=<span class="hljs-string">"480"</span>></span>
<span class="hljs-tag" name="tag"><h3></span>PASSIONATE<span class="hljs-tag"><</span><span class="hljs-tag">strong</span>>JULIA<span class="hljs-tag"></</span><span class="hljs-tag">strong></span><span class="hljs-tag"></h3></span>
<span class="hljs-tag" name="tag"><ul></span>
<span class="hljs-tag" name="tag"><li></span>Julia dances in the deep dark.<span class="hljs-tag"></li></span>
<span class="hljs-tag" name="tag"><li></span>She loves the smell of the ocean<span class="hljs-tag"></li></span>
<span class="hljs-tag" name="tag"><li></span>And dives into the morning light<span class="hljs-tag"></li></span>
<span class="hljs-tag" name="tag"></<span class="hljs-name">ul</span>></span>
<span class="hljs-tag" name="tag"></<span class="hljs-name">div</span>></span>
</code></code><ul class="pre-numbering"></ul></pre>
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效果如下：