Javascript code prettifier
Setup
- Download a distribution
- Include the script and stylesheets in your document (you will need to make sure the css and js file are on your server, and adjust the paths in the script and link tag)
<link href="prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="prettify.js"></script>
- Add
onload="prettyPrint()" to your document's body tag.
- Modify the stylesheet to get the coloring you prefer
Usage
Put code snippets in <pre class="prettyprint">...</pre> or <code class="prettyprint">...</code> and it will automatically be pretty printed.
| The original
| Prettier
|
class Voila {
public:
// Voila
static const string VOILA = "Voila";
// will not interfere with embedded tags.
}
|
class Voila {
public:
// Voila
static const string VOILA = "Voila";
// will not interfere with embedded tags.
}
|
FAQ
Which languages does it work for?
The comments in prettify.js are authoritative but the lexer should work on a number of languages including C and friends, Java, Python, Bash, SQL, HTML, XML, CSS, Javascript, and Makefiles. It works passably on Ruby, PHP and Awk and a decent subset of Perl, but, because of commenting conventions, doesn't work on Smalltalk, or CAML-like languages.
LISPy languages are supported via an extension: lang-lisp.js.
And similarly for LUA, OCAML, SML, F#, SQL, and Protocol Buffers.
If you'd like to add an extension for your favorite language, please look at lang-lisp.js and file an issue including your language extension, and a testcase.
How do I specify which language my code is in?
You don't need to specify the language since prettyprint() will guess. You can specify a language by specifying the language extension along with the prettyprint class like so:
<pre class="prettyprint lang-html">
The lang-* class specifies the language file extensions.
Supported file extensions include
"c", "cc", "cpp", "cs", "cyc", "java", "bsh", "csh", "sh",
"cv", "py", "perl", "pl", "pm", "rb", "js",
"html", "html", "xhtml", "xml", "xsl".
</pre>
It doesn't work on <obfuscated code sample>?
Yes. Prettifying obfuscated code is like putting lipstick on a pig — i.e. outside the scope of this tool.
Which browsers does it work with?
It's been tested with IE 6, Firefox 1.5 & 2, and Safari 2.0.4. Look at the test page to see if it works in your browser.
What's changed?
See the change log
Why doesn't Prettyprinting of strings work on WordPress?
Apparently wordpress does "smart quoting" which changes close quotes. This causes end quotes to not match up with open quotes.
This breaks prettifying as well as copying and pasting of code samples. See WordPress's help center for info on how to stop smart quoting of code snippets.
How do I put line numbers in my code?
You can use the nocode class to identify a span of markup that is not code.
<pre class=prettyprint>
<span class="nocode">1:</span> /* This is line 1 of my code
<span class="nocode">2:</span> * and here's line 2 */
<span class="nocode">3:</span> print("I'm line number 3");
</pre>
produces
1: /* This is line 1 of my code
2: * and here's line 2 */
3: print("I'm line number 3");
For a more complete example see the issue22 testcase.