74 lines
2.6 KiB
Plaintext
74 lines
2.6 KiB
Plaintext
=====================
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Javascript Minifier
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=====================
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rJSmin is a javascript minifier written in python.
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The minifier is based on the semantics of `jsmin.c by Douglas Crockford`_\.
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The module is a re-implementation aiming for speed, so it can be used at
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runtime (rather than during a preprocessing step). Usually it produces the
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same results as the original ``jsmin.c``. It differs in the following ways:
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- there is no error detection: unterminated string, regex and comment
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literals are treated as regular javascript code and minified as such.
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- Control characters inside string and regex literals are left untouched; they
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are not converted to spaces (nor to \n)
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- Newline characters are not allowed inside string and regex literals, except
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for line continuations in string literals (ECMA-5).
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- "return /regex/" is recognized correctly.
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- Line terminators after regex literals are handled more sensibly
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- "+ +" and "- -" sequences are not collapsed to '++' or '--'
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- Newlines before ! operators are removed more sensibly
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- Comments starting with an exclamation mark (``!``) can be kept optionally
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- rJSmin does not handle streams, but only complete strings. (However, the
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module provides a "streamy" interface).
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Since most parts of the logic are handled by the regex engine it's way faster
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than the original python port of ``jsmin.c`` by Baruch Even. The speed factor
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varies between about 6 and 55 depending on input and python version (it gets
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faster the more compressed the input already is). Compared to the
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speed-refactored python port by Dave St.Germain the performance gain is less
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dramatic but still between 3 and 50 (for huge inputs)). See the
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docs/BENCHMARKS file for details.
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rjsmin.c is a reimplementation of rjsmin.py in C and speeds it up even more.
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Both python 2 (>=2.4) and python 3 are supported.
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.. _jsmin.c by Douglas Crockford: http://www.crockford.com/javascript/jsmin.c
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Copyright and License
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~~~~~~~~~~~~~~~~~~~~~
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Copyright 2011 - 2015
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André Malo or his licensors, as applicable.
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The whole package (except for the files in the bench/ directory) is
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distributed under the Apache License Version 2.0. You'll find a copy in the
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root directory of the distribution or online at:
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<http://www.apache.org/licenses/LICENSE-2.0>.
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Bugs
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~~~~
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No bugs, of course. ;-)
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But if you've found one or have an idea how to improve rjsmin, feel free
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to send a pull request on `github <https://github.com/ndparker/rjsmin>`_
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or send a mail to <rjsmin-bugs@perlig.de>.
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Author Information
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~~~~~~~~~~~~~~~~~~
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André "nd" Malo <nd perlig.de>
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GPG: 0x8103A37E
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If God intended people to be naked, they would be born that way.
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-- Oscar Wilde
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.. vim:tw=72 syntax=rest
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