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语法高亮，滚动条美化，设置页面调整

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docs/javascript/Reference/Statements/debugger.html
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<p><strong>debugger 语句</strong>调用任何可用的调试功能，例如设置断点。 如果没有调试功能可用，则此语句不起作用。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox" style="font-size: 14px; white-space: normal;"><code>debugger;</code>
</pre>
</code></pre>
<h2 id="示例">示例</h2>
<p>下面的例子演示了一个包含 debugger 语句的函数，当函数被调用时，会尝试调用一个可用的调试器进行调试。</p>
<pre class="brush:js language-js" style="padding: 1em 0px 1em 30px; font-size: 14px; white-space: normal; color: rgb(77, 78, 83);"><code class="language-js" style="direction: ltr; white-space: pre;"><span class="keyword token" style="color: #0077aa;">function</span> <span class="function token" style="color: #dd4a68;">potentiallyBuggyCode<span class="punctuation token" style="color: #999999;">(</span></span><span class="punctuation token" style="color: #999999;">)</span> <span class="punctuation token" style="color: #999999;">{</span>
<pre><code class="language-js language-js" style="padding: 1em 0px 1em 30px; font-size: 14px; white-space: normal; color: rgb(77, 78, 83);"><code class="language-js" style="direction: ltr; white-space: pre;"><span class="keyword token" style="color: #0077aa;">function</span> <span class="function token" style="color: #dd4a68;">potentiallyBuggyCode<span class="punctuation token" style="color: #999999;">(</span></span><span class="punctuation token" style="color: #999999;">)</span> <span class="punctuation token" style="color: #999999;">{</span>
<span class="keyword token" style="color: #0077aa;">debugger</span><span class="punctuation token" style="color: #999999;">;</span>
<span class="comment token" style="color: #708090;"> // do potentially buggy stuff to examine, step through, etc.
</span><span class="punctuation token" style="color: #999999;">}</span></code></pre>
</span><span class="punctuation token" style="color: #999999;">}</span></code></code></pre>
<p>当 debugger 被调用时, 执行暂停在 debugger 语句的位置。就像在脚本源代码中的断点一样。</p>
<p><a class="external" href="https://mdn.mozillademos.org/files/6963/Screen%20Shot%202014-02-07%20at%209.14.35%20AM.png" rel="noopener"><img alt="Paused at a debugger statement." src="https://mdn.mozillademos.org/files/6963/Screen%20Shot%202014-02-07%20at%209.14.35%20AM.png" style="height: 371px; width: 700px;"/></a></p>
<h2 id="规范">规范</h2>