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# expand-brackets [](http://badge.fury.io/js/expand-brackets)
> Expand POSIX bracket expressions (character classes) in glob patterns.
## Install with [npm](npmjs.org)
```bash
npm i expand-brackets --save
```
## Usage
```js
var brackets = require('expand-brackets');
brackets('[![:lower:]]');
//=> '[^a-z]'
```
## .isMatch
Return true if the given string matches the bracket expression:
```js
brackets.isMatch('A', '[![:lower:]]');
//=> true
brackets.isMatch('a', '[![:lower:]]');
//=> false
```
## .makeRe
Make a regular expression from a bracket expression:
```js
brackets.makeRe('[![:lower:]]');
//=> /[^a-z]/
```
The following named POSIX bracket expressions are supported:
- `[:alnum:]`: Alphanumeric characters (`a-zA-Z0-9]`)
- `[:alpha:]`: Alphabetic characters (`a-zA-Z]`)
- `[:blank:]`: Space and tab (`[ t]`)
- `[:digit:]`: Digits (`[0-9]`)
- `[:lower:]`: Lowercase letters (`[a-z]`)
- `[:punct:]`: Punctuation and symbols. (`[!"#$%&'()*+, -./:;<=>?@ [\]^_``{|}~]`)
- `[:upper:]`: Uppercase letters (`[A-Z]`)
- `[:word:]`: Word characters (letters, numbers and underscores) (`[A-Za-z0-9_]`)
- `[:xdigit:]`: Hexadecimal digits (`[A-Fa-f0-9]`)
Collating sequences are not supported, and probably won't be.
## Run tests
Install dev dependencies:
```bash
npm i -d && npm test
```
## Contributing
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/expand-brackets/issues)
## Author
**Jon Schlinkert**
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
## License
Copyright (c) 2015 Jon Schlinkert
Released under the MIT license
***
_This file was generated by [verb](https://github.com/assemble/verb) on February 11, 2015._
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