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- ==============================================================================
- YUI Compressor
- ==============================================================================
-
- NAME
-
- YUI Compressor - The Yahoo! JavaScript and CSS Compressor
-
- SYNOPSIS
-
- Usage: java -jar yuicompressor-x.y.z.jar [options] [input file]
-
- Global Options
- -h, --help Displays this information
- --type <js|css> Specifies the type of the input file
- --charset <charset> Read the input file using <charset>
- --line-break <column> Insert a line break after the specified column number
- -v, --verbose Display informational messages and warnings
- -o <file> Place the output into <file>. Defaults to stdout.
-
- JavaScript Options
- --nomunge Minify only, do not obfuscate
- --preserve-semi Preserve all semicolons
- --disable-optimizations Disable all micro optimizations
-
- DESCRIPTION
-
- The YUI Compressor is a JavaScript compressor which, in addition to removing
- comments and white-spaces, obfuscates local variables using the smallest
- possible variable name. This obfuscation is safe, even when using constructs
- such as 'eval' or 'with' (although the compression is not optimal is those
- cases) Compared to jsmin, the average savings is around 20%.
-
- The YUI Compressor is also able to safely compress CSS files. The decision
- on which compressor is being used is made on the file extension (js or css)
-
- GLOBAL OPTIONS
-
- -h, --help
- Prints help on how to use the YUI Compressor
-
- --line-break
- Some source control tools don't like files containing lines longer than,
- say 8000 characters. The linebreak option is used in that case to split
- long lines after a specific column. It can also be used to make the code
- more readable, easier to debug (especially with the MS Script Debugger)
- Specify 0 to get a line break after each semi-colon in JavaScript, and
- after each rule in CSS.
-
- --type js|css
- The type of compressor (JavaScript or CSS) is chosen based on the
- extension of the input file name (.js or .css) This option is required
- if no input file has been specified. Otherwise, this option is only
- required if the input file extension is neither 'js' nor 'css'.
-
- --charset character-set
- If a supported character set is specified, the YUI Compressor will use it
- to read the input file. Otherwise, it will assume that the platform's
- default character set is being used. The output file is encoded using
- the same character set.
-
- -o outfile
- Place output in file outfile. If not specified, the YUI Compressor will
- default to the standard output, which you can redirect to a file.
-
- -v, --verbose
- Display informational messages and warnings.
-
- JAVASCRIPT ONLY OPTIONS
-
- --nomunge
- Minify only. Do not obfuscate local symbols.
-
- --preserve-semi
- Preserve unnecessary semicolons (such as right before a '}') This option
- is useful when compressed code has to be run through JSLint (which is the
- case of YUI for example)
-
- --disable-optimizations
- Disable all the built-in micro optimizations.
-
- NOTES
-
- + If no input file is specified, it defaults to stdin.
-
- + The YUI Compressor requires Java version >= 1.4.
-
- + It is possible to prevent a local variable, nested function or function
- argument from being obfuscated by using "hints". A hint is a string that
- is located at the very beginning of a function body like so:
-
- function fn (arg1, arg2, arg3) {
- "arg2:nomunge, localVar:nomunge, nestedFn:nomunge";
-
- ...
- var localVar;
- ...
-
- function nestedFn () {
- ....
- }
-
- ...
- }
-
- The hint itself disappears from the compressed file.
-
- + C-style comments starting with /*! are preserved. This is useful with
- comments containing copyright/license information. For example:
-
- /*!
- * TERMS OF USE - EASING EQUATIONS
- * Open source under the BSD License.
- * Copyright 2001 Robert Penner All rights reserved.
- */
-
- becomes:
-
- /*
- * TERMS OF USE - EASING EQUATIONS
- * Open source under the BSD License.
- * Copyright 2001 Robert Penner All rights reserved.
- */
-
- AUTHOR
-
- The YUI Compressor was written and is maintained by:
- Julien Lecomte <jlecomte@yahoo-inc.com>
- The CSS portion is a port of Isaac Schlueter's cssmin utility.
-
- COPYRIGHT
-
- Copyright (c) 2007, Yahoo! Inc. All rights reserved.
- Code licensed under the BSD License:
- http://developer.yahoo.net/yui/license.txt
-