1JavaScript::Minifier(3)User Contributed Perl DocumentatioJnavaScript::Minifier(3)
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6 JavaScript::Minifier - Perl extension for minifying JavaScript code
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9 To minify a JavaScript file and have the output written directly to
10 another file
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12 use JavaScript::Minifier qw(minify);
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14 open(my $in, 'myScript.js') or die;
15 open(my $out, '>', 'myScript-min.js') or die;
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17 minify(input => $in, outfile => $out);
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19 close($in);
20 close($out);
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22 To minify a JavaScript string literal. Note that by omitting the
23 outfile parameter a the minified code is returned as a string.
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25 my $minifiedJavaScript = minify(input => 'var x = 2;');
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27 To include a copyright comment at the top of the minified code.
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29 minify(input => 'var x = 2;', copyright => 'BSD License');
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31 To treat ';;;' as '//' so that debugging code can be removed. This is a
32 common JavaScript convention for minification.
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34 minify(input => 'var x = 2;', stripDebug => 1);
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36 The "input" parameter is mandatory. The "output", "copyright", and
37 "stripDebug" parameters are optional and can be used in any
38 combination.
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41 This module removes unnecessary whitespace from JavaScript code. The
42 primary requirement developing this module is to not break working
43 code: if working JavaScript is in input then working JavaScript is
44 output. It is ok if the input has missing semi-colons, snips like '++
45 +' or '12 .toString()', for example. Internet Explorer conditional
46 comments are copied to the output but the code inside these comments
47 will not be minified.
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49 The ECMAScript specifications allow for many different whitespace
50 characters: space, horizontal tab, vertical tab, new line, carriage
51 return, form feed, and paragraph separator. This module understands all
52 of these as whitespace except for vertical tab and paragraph separator.
53 These two types of whitespace are not minimized.
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55 For static JavaScript files, it is recommended that you minify during
56 the build stage of web deployment. If you minify on-the-fly then it
57 might be a good idea to cache the minified file. Minifying static files
58 on-the-fly repeatedly is wasteful.
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60 EXPORT
61 Exported by default: "minifiy()"
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64 This module is inspired by Douglas Crockford's JSMin:
65 <http://www.crockford.com/javascript/jsmin.html>
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67 You may also be interested in the CSS::Minifier module also available
68 on CPAN.
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71 You can obtain the latest source code and submit bug reports on the
72 github repository for this module:
73 <https://github.com/zoffixznet/JavaScript-Minifier>
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76 Zoffix Znet "<zoffix@cpan.org>" <https://metacpan.org/author/ZOFFIX>
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79 Peter Michaux, <petermichaux@gmail.com>
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81 Eric Herrera, <herrera@10east.com>
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84 Miller 'tmhall' Hall
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86 Вячеслав 'vti' Тихановский
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88 Fedor A. 'faf' Fetisov
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91 Copyright (C) 2007 by Peter Michaux
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93 This library is free software; you can redistribute it and/or modify it
94 under the same terms as Perl itself, either Perl version 5.8.6 or, at
95 your option, any later version of Perl 5 you may have available.
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99perl v5.32.1 2021-03-04 JavaScript::Minifier(3)