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# rework [](https://travis-ci.org/reworkcss/rework)
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CSS manipulations built on [`css`](https://github.com/reworkcss/css), allowing
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you to automate vendor prefixing, create your own properties, inline images,
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anything you can imagine!
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Please refer to [`css`](https://github.com/reworkcss/css) for AST documentation
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and to report parser/stringifier issues.
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## Installation
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$ npm install rework
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## Usage
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```js
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var rework = require('rework');
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var pluginA = require('pluginA');
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var pluginB = require('pluginB');
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rework('body { font-size: 12px; }', { source: 'source.css' })
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.use(pluginA)
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.use(pluginB)
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.toString({ sourcemap: true })
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```
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## API
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### rework(code, [options])
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Accepts a CSS string and returns a new `Rework` instance. The `options` are
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passed directly to `css.parse`.
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### Rework#use(fn)
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Use the given plugin `fn`. A rework "plugin" is simply a function accepting the
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stylesheet root node and the `Rework` instance.
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### Rework#toString([options])
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Returns the string representation of the manipulated CSS. The `options` are
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passed directly to `css.stringify`.
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Unlike `css.stringify`, if you pass `sourcemap: true` a string will still be
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returned, with the source map inlined. Also use `sourcemapAsObject: true` if
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you want the `css.stringify` return value.
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## Plugins
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Rework has a rich collection of plugins and mixins. Browse all the [Rework
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plugins](https://www.npmjs.org/search?q=rework) available on npm.
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Plugins of particular note:
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- [at2x](https://github.com/reworkcss/rework-plugin-at2x/) – serve high resolution images
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- [calc](https://github.com/reworkcss/rework-calc) – resolve simple `calc()` expressions
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- [colors](https://github.com/reworkcss/rework-plugin-colors/) – color helpers like `rgba(#fc0, .5)`
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- [ease](https://github.com/reworkcss/rework-plugin-ease/) – several additional easing functions
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- [extend](https://github.com/reworkcss/rework-inherit/) – `extend: selector` support
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- [function](https://github.com/reworkcss/rework-plugin-function/) – user-defined CSS functions
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- [import](https://github.com/reworkcss/rework-import) – read and inline CSS via `@import`
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- [inline](https://github.com/reworkcss/rework-plugin-inline) – inline assets as data URIs
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- [mixin](https://github.com/reworkcss/rework-plugin-mixin/) – custom property logic with mixins
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- [npm](https://github.com/reworkcss/rework-npm) - inline CSS via `@import` using node's module resolver
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- [references](https://github.com/reworkcss/rework-plugin-references/) – property references like `height: @width`
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- [url](https://github.com/reworkcss/rework-plugin-url/) – rewrite `url()`s with a given function
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- [variables](https://github.com/reworkcss/rework-vars/) – W3C-style variables
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## Built with rework
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- [styl](https://github.com/visionmedia/styl)
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- [rework-pure-css](https://github.com/ianstormtaylor/rework-pure-css)
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- [rework-suit](https://github.com/suitcss/rework-suit)
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- [resin](https://github.com/topcoat/resin)
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- [Myth](https://github.com/segmentio/myth)
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## License
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(The MIT License)
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Copyright (c) 2012–2013 TJ Holowaychuk <tj@vision-media.ca>
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Copyright (c) 2014 Contributors
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the 'Software'), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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