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# grunt-contrib-cssmin [![Build Status](https://secure.travis-ci.org/gruntjs/grunt-contrib-cssmin.png?branch=master)](http://travis-ci.org/gruntjs/grunt-contrib-cssmin)
> Compress CSS files.
## Getting Started
This plugin requires Grunt `~0.4.0`
If you haven't used [Grunt](http://gruntjs.com/) before, be sure to check out the [Getting Started](http://gruntjs.com/getting-started) guide, as it explains how to create a [Gruntfile](http://gruntjs.com/sample-gruntfile) as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:
```shell npm install grunt-contrib-cssmin --save-dev ```
Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:
```js grunt.loadNpmTasks('grunt-contrib-cssmin'); ```
*This plugin was designed to work with Grunt 0.4.x. If you're still using grunt v0.3.x it's strongly recommended that [you upgrade](http://gruntjs.com/upgrading-from-0.3-to-0.4), but in case you can't please use [v0.3.2](https://github.com/gruntjs/grunt-contrib-cssmin/tree/grunt-0.3-stable).*
## Cssmin task
_Run this task with the `grunt cssmin` command._
Task targets, files and options may be specified according to the grunt [Configuring tasks](http://gruntjs.com/configuring-tasks) guide.
Files are compressed with [clean-css](https://github.com/GoalSmashers/clean-css). ### Options
#### banner
Type: `String` Default: `null`
Prefix the compressed source with the given banner, with a linebreak inbetween.
#### keepSpecialComments
Type: `String` `Number` Default: `'*'`
To keep or remove special comments, exposing the underlying option from [clean-css](https://github.com/GoalSmashers/clean-css).. `'*'` for keeping all (default), `1` for keeping first one, `0` for removing all.
#### report
Choices: `false`, `'min'`, `'gzip'` Default: `false`
Either do not report anything, report only minification result, or report minification and gzip results. This is useful to see exactly how well clean-css is performing but using `'gzip'` will make the task take 5-10x longer to complete.
Example ouput using `'gzip'`:
``` Original: 198444 bytes. Minified: 101615 bytes. Gzipped: 20084 bytes. ``` ### Usage Examples
#### Combine two files into one output file
```js cssmin: { combine: { files: { 'path/to/output.css': ['path/to/input_one.css', 'path/to/input_two.css'] } } } ```
#### Add a banner
```js cssmin: { add_banner: { options: { banner: '/* My minified css file */' }, files: { 'path/to/output.css': ['path/to/**/*.css'] } } } ```
#### Minify all contents of a release directory and add a `.min.css` extension
```js cssmin: { minify: { expand: true, cwd: 'release/css/', src: ['*.css', '!*.min.css'], dest: 'release/css/', ext: '.min.css' } } ```
## Release History
* 2013-05-25 v0.6.1 Support import in-lining vis clean-css ~1.0.4. * 2013-04-05 v0.6.0 Update clean-css dependency to ~1.0.0 * 2013-03-14 v0.5.0 Support for 'report' option (false by default) * 2013-03-10 v0.4.2 Add banner option Support clean-css keepSpecialComments * 2013-02-17 v0.4.1 Update clean-css dependency to ~0.10.0 * 2013-02-15 v0.4.0 First official release for Grunt 0.4.0. * 2013-01-23 v0.4.0rc7 Updating grunt/gruntplugin dependencies to rc7. Changing in-development grunt/gruntplugin dependency versions from tilde version ranges to specific versions. * 2013-01-09 v0.4.0rc5 Updating to work with grunt v0.4.0rc5. Switching to this.files api. * 2012-11-01 v0.3.2 Update clean-css dep. * 2012-10-12 v0.3.1 Rename grunt-contrib-lib dep to grunt-lib-contrib. * 2012-09-23 v0.3.0 Options no longer accepted from global config key. * 2012-09-10 v0.2.0 Refactored from grunt-contrib into individual repo.
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Task submitted by [Tim Branyen](http://goingslowly.com/)
*This file was generated on Sat May 25 2013 18:52:13.*
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