3a7feaeb3a
- jsmin() grew a new parameter: keep_bang_comments, defaulting to False - added command line options: -b keep bang comments -p force python-only implementation
73 lines
2.6 KiB
Plaintext
73 lines
2.6 KiB
Plaintext
=====================
|
|
Javascript Minifier
|
|
=====================
|
|
|
|
rJSmin is a javascript minifier written in python.
|
|
|
|
The minifier is based on the semantics of `jsmin.c by Douglas Crockford`_\.
|
|
|
|
The module is a re-implementation aiming for speed, so it can be used at
|
|
runtime (rather than during a preprocessing step). Usually it produces the
|
|
same results as the original ``jsmin.c``. It differs in the following ways:
|
|
|
|
- there is no error detection: unterminated string, regex and comment
|
|
literals are treated as regular javascript code and minified as such.
|
|
- Control characters inside string and regex literals are left untouched; they
|
|
are not converted to spaces (nor to \n)
|
|
- Newline characters are not allowed inside string and regex literals, except
|
|
for line continuations in string literals (ECMA-5).
|
|
- "return /regex/" is recognized correctly.
|
|
- "+ +" and "- -" sequences are not collapsed to '++' or '--'
|
|
- Newlines before ! operators are removed more sensibly
|
|
- Comments starting with an exclamation mark (``!``) can be kept optionally
|
|
- rJSmin does not handle streams, but only complete strings. (However, the
|
|
module provides a "streamy" interface).
|
|
|
|
Since most parts of the logic are handled by the regex engine it's way
|
|
faster than the original python port of ``jsmin.c`` by Baruch Even. The speed
|
|
factor varies between about 6 and 55 depending on input and python version
|
|
(it gets faster the more compressed the input already is). Compared to the
|
|
speed-refactored python port by Dave St.Germain the performance gain is less
|
|
dramatic but still between 1.2 and 7. See the docs/BENCHMARKS file for
|
|
details.
|
|
|
|
rjsmin.c is a reimplementation of rjsmin.py in C and speeds it up even more.
|
|
|
|
Both python 2 (>=2.4) and python 3 are supported.
|
|
|
|
.. _jsmin.c by Douglas Crockford: http://www.crockford.com/javascript/jsmin.c
|
|
|
|
|
|
Copyright and License
|
|
~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Copyright 2011 - 2014
|
|
André Malo or his licensors, as applicable.
|
|
|
|
The whole package (except for the files in the bench/ directory) is
|
|
distributed under the Apache License Version 2.0. You'll find a copy in the
|
|
root directory of the distribution or online at:
|
|
<http://www.apache.org/licenses/LICENSE-2.0>.
|
|
|
|
|
|
Bugs
|
|
~~~~
|
|
|
|
No bugs, of course. ;-)
|
|
But if you've found one or have an idea how to improve rjsmin, feel free
|
|
to send a pull request on `github <https://github.com/ndparker/rjsmin>`_
|
|
or send a mail to <rjsmin-bugs@perlig.de>.
|
|
|
|
|
|
Author Information
|
|
~~~~~~~~~~~~~~~~~~
|
|
|
|
André "nd" Malo <nd perlig.de>
|
|
GPG: 0x8103A37E
|
|
|
|
|
|
If God intended people to be naked, they would be born that way.
|
|
-- Oscar Wilde
|
|
|
|
.. vim:tw=72 syntax=rest
|