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(almost) all CSS minifiers available for node.js

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# css-minifiers [![Build Status](https://travis-ci.org/ben-eb/css-minifiers.svg?branch=master)][ci] [![NPM version](https://badge.fury.io/js/css-minifiers.svg)][npm] [![Dependency Status](https://gemnasium.com/ben-eb/css-minifiers.svg)][deps]

> (almost) all CSS minifiers available for node.js

## Why?

This module provides a convenient list of the CSS minifiers that are out there
for the Node ecosystem, should you need to compare minification results across
engines. It has mostly been inspired from [the minification benchmark][1], and
provides a simple, normalised API for all available tools.

## Engine support

| Engine | Support |
| ------ | ------- |
| [clean-css](https://github.com/jakubpawlowicz/clean-css)  | ✅ |
| [crass](https://github.com/mattbasta/crass)               | ✅ |
| [css-condense](https://github.com/rstacruz/css-condense)  | ✅ |
| [css-smasher](https://github.com/MarkBennett/css-smasher) | ❌ |
| [cssnano](https://github.com/ben-eb/cssnano)              | ✅ |
| [csso](https://github.com/css/csso)                       | ✅ |
| [cssshrink](https://github.com/stoyan/cssshrink)          | ✅ |
| [csswring](https://github.com/hail2u/node-csswring)       | ✅ |
| [more-css](https://github.com/army8735/more)              | ❌ |
| [ncss](https://github.com/wasche/ncss)                    | ✅ |
| [sqwish](https://github.com/ded/sqwish)                   | ✅ |
| [ycssmin](https://github.com/yui/ycssmin)                 | ✅ |

If you've written a minifier that you'd like to add to this list, please send a
pull request!

## Usage

Since version 2, all minifiers are wrapped with the Promise API:

```js
var minifiers = require('css-minifiers');
var css = 'h1 { color: #880000; }';
var csso = minifiers.csso;

csso(css).then(function (output) {
    console.log(output);
    // => h1{color:#800}
});
```

Get a benchmark compression time:

```js
csso.bench(css).then(function (output) {
    console.log(output);
    // => 1.4 ms
});

csso.bench(css, true).then(function (output) {
    console.log(output);
    // => 1.399856 ms
});
```

The version number & homepage for the engine are also exposed:

```js
console.log(csso.version, csso.url);
// => 1.3.11 https://github.com/css/csso
```

## Install

With [npm](https://npmjs.com) do:

```
npm install css-minifiers
```

## Contributing

Pull requests are welcome. If you add functionality, then please add unit tests
to cover it.

## License

[1]: https://github.com/GoalSmashers/css-minification-benchmark

[ci]:   https://travis-ci.org/ben-eb/css-minifiers
[deps]: https://gemnasium.com/ben-eb/css-minifiers
[npm]:  http://badge.fury.io/js/css-minifiers

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