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# Highlight.js Highlight.js highlights syntax in code examples on blogs, forums and in fact on any web pages. It's very easy to use because it works automatically: finds blocks of code, detects a language, highlights it. Autodetection can be fine tuned when it fails by itself (see "Heuristics"). ## Installation and usage Downloaded package includes file "highlight.pack.js" which is a full compressed version of the library intended to use in production. All uncompressed source files are also available, feel free to look into them! The script is installed by linking to a single file and making a single initialization call: <script type="text/javascript" src="highlight.pack.js"></script> <script type="text/javascript"> hljs.initHighlightingOnLoad(); </script> Also you can replaces TAB ('\x09') characters used for indentation in your code with some fixed number of spaces or with a `<span>` to set them special styling: <script type="text/javascript"> hljs.tabReplace = ' '; // 4 spaces // ... or hljs.tabReplace = '<span class="indent">\t</span>'; hljs.initHighlightingOnLoad(); </script> Then the script looks in your page for fragments `<pre><code>...</code></pre>` that are used traditionally to mark up code examples. Their content is marked up by logical pieces with defined class names. ### Custom initialization If you use different markup for code blocks you can initialize them manually with `highlightBlock(code, tabReplace)` function. It takes a DOM element containing the code to highlight and optionally a string with which to replace TAB characters. Initialization using for example jQuery might look like this: $(document).ready(function() { $('pre code').each(function(i, e) {hljs.highlightBlock(e, ' ')}); }); ### Styling Elements of code marked up with classes can be styled as desired: .comment { color: gray; } .keyword { font-weight: bold; } .python .string { color: blue; } .html .atribute .value { color: green; } Highligt.js comes with several style themes located in "styles" directory that can be used directly or as a base for your own experiments. A full list of available classes is below ("Languages"). ## Export File export.html contains a little program that shows and allows to copy and paste an HTML code generated by the highlighter for any code snippet. This can be useful in situations when one can't use the script itself on a site. ## Languages This is a full list of available classes corresponding to languages' syntactic structures. In parentheses after language names are identifiers used as class names in `<code>` element. Python ("python"): keyword keyword built_in built-in objects (None, False, True and Ellipsis) number number string string (of any type) comment comment decorator @-decorator for functions function function header "def some_name(...):" class class header "class SomeName(...):" title name of a function or a class inside a header params everything inside parentheses in a function's or class' header Python profiler results ("profile"): number number string string builtin builtin function entry filename filename in an entry summary profiling summary header header of table of results keyword column header function function name in an entry (including parentheses) title actual name of a function in an entry (excluding parentheses) Ruby ("ruby"): keyword keyword string string subst in-string substitution (#{...}) comment comment yardoctag YARD tag function function header "def some_name(...):" class class header "class SomeName(...):" title name of a function or a class inside a header parent name of a parent class symbol symbol instancevar instance variable Perl ("perl"): keyword keyword comment comment number number string string regexp regular expression sub subroutine header (from "sub" till "{") variable variable starting with "$", "%", "@" operator operator pod plain old doc PHP ("php"): keyword keyword number number string string (of any type) comment comment phpdoc phpdoc params in comments variable variable starting with "$" preprocessor preprocessor marks: "<?php" and "?>" Scala ("scala"): keyword keyword number number string string comment comment annotaion annotation javadoc javadoc comment javadoctag @-tag in javadoc class class header title class name inside a header params everything in parentheses inside a class header inheritance keywords "extends" and "with" inside class header XML ("xml"): tag any tag from "<" till ">" comment comment pi processing instruction (<? ... ?>) cdata CDATA section attribute attribute value attribute's value HTML ("html"): keyword HTML tag tag any tag from "<" till ">" comment comment doctype <!DOCTYPE ... > declaration attribute tag's attribute with or without value value attribute's value CSS ("css"): keyword HTML tag when in selectors, CSS keyword when in rules id #some_name in selectors class .some_name in selectors at_rule @-rule till first "{" or ";" attr_selector attribute selector (square brackets in a[href^=http://]) pseudo pseudo classes and elemens (:after, ::after etc.) comment comment rules everything from "{" till "}" value property's value inside a rule, from ":" till ";" or till the end of rule block number number within a value string string within a value hexcolor hex color (#FFFFFF) within a value function CSS function within a value params everything between "(" and ")" within a function Django ("django"): keyword HTML tag in HTML, default tags and default filters in templates tag any tag from "<" till ">" comment comment doctype <!DOCTYPE ... > declaration attribute tag's attribute with or withou value value attribute's value template_tag template tag {% .. %} variable template variable {{ .. }} template_comment template comment, both {# .. #} and {% comment %} filter filter from "|" till the next filter or the end of tag argument filter argument Javascript ("javascript"): keyword keyword comment comment number number literal special literal: "true", "false" and "null" string string regexp regular expression function header of a function title name of a function inside a header params everything inside parentheses in a function's header VBScript ("vbscript"): keyword keyword number number string string comment comment built_in built-in function Lua ("lua"): keyword keyword number number string string comment comment built_in built-in operator function header of a function title name of a function inside a header params everything inside parentheses in a function's header long_bracke