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javascript::minifier::xs

JavaScript::Minifier::XS(3pm)				User Contributed Perl Documentation			     JavaScript::Minifier::XS(3pm)

NAME

       JavaScript::Minifier::XS - XS based JavaScript minifier

SYNOPSIS

	 use JavaScript::Minifier::XS qw(minify);
	 $minified = minify($js);

DESCRIPTION

       "JavaScript::Minifier::XS" is a JavaScript "minifier"; its designed to remove un-necessary whitespace and comments from JavaScript files,
       which also not breaking the JavaScript.

       "JavaScript::Minifier::XS" is similar in function to "JavaScript::Minifier", but is substantially faster as its written in XS and not just
       pure Perl.

METHODS

       minify($js)
	   Minifies the given $js, returning the minified JavaScript back to the caller.

HOW IT WORKS

       "JavaScript::Minifier::XS" minifies the JavaScript by removing un-necessary whitespace from JavaScript documents.  Comments (both block and
       line) are also removed, except when (a) they contain the word "copyright" in them, or (b) they're needed to implement "IE Conditional
       Compilation".

       Internally, the minification process is done by taking multiple passes through the JavaScript document:

   Pass 1: Tokenize
       First, we go through and parse the JavaScript document into a series of tokens internally.  The tokenizing process does not check to make
       sure you've got syntactically valid JavaScript, it just breaks up the text into a stream of tokens suitable for processing by the
       subsequent stages.

   Pass 2: Collapse
       We then march through the token list and collapse certain tokens down to their smallest possible representation.  If they're still included
       in the final results we only want to include them at their shortest.

       Whitespace
	   Runs of multiple whitespace characters are reduced down to a single whitespace character.  If the whitespace contains any "end of line"
	   (EOL) characters, then the end result is the first EOL character encountered.  Otherwise, the result is the first whitespace character
	   in the run.

   Pass 3: Pruning
       We then go back through the token list and prune and remove un-necessary tokens.

       Whitespace
	   Wherever possible, whitespace is removed; before+after comment blocks, and before+after various symbols/sigils.

       Comments
	   Comments that are either (a) IE conditional compilation comments, or that (b) contain the word "copyright" in them are preserved.  All
	   other comments (line and block) are removed.

       Everything else
	   We keep everything else; identifiers, quoted literal strings, symbols/sigils, etc.

   Pass 4: Re-assembly
       Lastly, we go back through the token list and re-assemble it all back into a single JavaScript string, which is then returned back to the
       caller.

AUTHOR

       Graham TerMarsch (cpan@howlingfrog.com)

REPORTING BUGS

       Please report bugs via RT (<http://rt.cpan.org/Dist/Display.html?Queue=JavaScript::Minifier::XS>), and be sure to include the JavaScript
       that you're having troubles minifying.

COPYRIGHT

       Copyright (C) 2007-2008, Graham TerMarsch.  All Rights Reserved.

       This is free software; you can redistribute it and/or modify it under the same license as Perl itself.

SEE ALSO

       "JavaScript::Minifier".

perl v5.14.2							    2011-11-15					     JavaScript::Minifier::XS(3pm)