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<h1 id="syntax-highlighting"><a class="header" href="#syntax-highlighting">Syntax Highlighting</a></h1>
<p>mdBook uses <a href="https://highlightjs.org">Highlight.js</a> with a custom theme
for syntax highlighting.</p>
<p>Automatic language detection has been turned off, so you will probably want to
specify the programming language you use like this:</p>
<pre><code class="language-markdown">```rust
fn main() {
// Some code
}
```
</code></pre>
<h2 id="supported-languages"><a class="header" href="#supported-languages">Supported languages</a></h2>
<p>These languages are supported by default, but you can add more by supplying
your own <code>highlight.js</code> file:</p>
<ul>
<li>apache</li>
<li>armasm</li>
<li>bash</li>
<li>c</li>
<li>coffeescript</li>
<li>cpp</li>
<li>csharp</li>
<li>css</li>
<li>d</li>
<li>diff</li>
<li>go</li>
<li>handlebars</li>
<li>haskell</li>
<li>http</li>
<li>ini</li>
<li>java</li>
<li>javascript</li>
<li>json</li>
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<li>less</li>
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<li>makefile</li>
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<li>ruby</li>
<li>rust</li>
<li>scala</li>
<li>scss</li>
<li>shell</li>
<li>sql</li>
<li>swift</li>
<li>typescript</li>
<li>x86asm</li>
<li>xml</li>
<li>yaml</li>
</ul>
<h2 id="custom-theme"><a class="header" href="#custom-theme">Custom theme</a></h2>
<p>Like the rest of the theme, the files used for syntax highlighting can be
overridden with your own.</p>
<ul>
<li><em><strong>highlight.js</strong></em> normally you shouldn't have to overwrite this file, unless
you want to use a more recent version.</li>
<li><em><strong>highlight.css</strong></em> theme used by highlight.js for syntax highlighting.</li>
</ul>
<p>If you want to use another theme for <code>highlight.js</code> download it from their
website, or make it yourself, rename it to <code>highlight.css</code> and put it in
the <code>theme</code> folder of your book.</p>
<p>Now your theme will be used instead of the default theme.</p>
<h2 id="improve-default-theme"><a class="header" href="#improve-default-theme">Improve default theme</a></h2>
<p>If you think the default theme doesn't look quite right for a specific language,
or could be improved, feel free to <a href="https://github.com/rust-lang/mdBook/issues">submit a new
issue</a> explaining what you
have in mind and I will take a look at it.</p>
<p>You could also create a pull-request with the proposed improvements.</p>
<p>Overall the theme should be light and sober, without too many flashy colors.</p>
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