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- # extglob [](http://badge.fury.io/js/extglob) [](https://travis-ci.org/jonschlinkert/extglob)
- > Convert extended globs to regex-compatible strings. Add (almost) the expressive power of regular expressions to glob patterns.
- Install with [npm](https://www.npmjs.com/)
- ```sh
- $ npm i extglob --save
- ```
- Used by [micromatch](https://github.com/jonschlinkert/micromatch).
- **Features**
- * Convert an extglob string to a regex-compatible string. **Only converts extglobs**, to handle full globs use [micromatch](https://github.com/jonschlinkert/micromatch).
- * Pass `{regex: true}` to return a regex
- * Handles nested patterns
- * More complete (and correct) support than [minimatch](https://github.com/isaacs/minimatch)
- ## Usage
- ```js
- var extglob = require('extglob');
- extglob('?(z)');
- //=> '(?:z)?'
- extglob('*(z)');
- //=> '(?:z)*'
- extglob('+(z)');
- //=> '(?:z)+'
- extglob('@(z)');
- //=> '(?:z)'
- extglob('!(z)');
- //=> '(?!^(?:(?!z)[^/]*?)).*$'
- ```
- **Optionally return regex**
- ```js
- extglob('!(z)', {regex: true});
- //=> /(?!^(?:(?!z)[^/]*?)).*$/
- ```
- ## Extglob patterns
- To learn more about how extglobs work, see the docs for [Bash pattern matching](https://www.gnu.org/software/bash/manual/html_node/Pattern-Matching.html):
- * `?(pattern)`: Match zero or one occurrence of the given pattern.
- * `*(pattern)`: Match zero or more occurrences of the given pattern.
- * `+(pattern)`: Match one or more occurrences of the given pattern.
- * `@(pattern)`: Match one of the given pattern.
- * `!(pattern)`: Match anything except one of the given pattern.
- ## Related
- * [braces](https://github.com/jonschlinkert/braces): Fastest brace expansion for node.js, with the most complete support for the Bash 4.3 braces… [more](https://github.com/jonschlinkert/braces)
- * [expand-brackets](https://github.com/jonschlinkert/expand-brackets): Expand POSIX bracket expressions (character classes) in glob patterns.
- * [expand-range](https://github.com/jonschlinkert/expand-range): Fast, bash-like range expansion. Expand a range of numbers or letters, uppercase or lowercase. See… [more](https://github.com/jonschlinkert/expand-range)
- * [fill-range](https://github.com/jonschlinkert/fill-range): Fill in a range of numbers or letters, optionally passing an increment or multiplier to… [more](https://github.com/jonschlinkert/fill-range)
- * [micromatch](https://github.com/jonschlinkert/micromatch): Glob matching for javascript/node.js. A drop-in replacement and faster alternative to minimatch and multimatch. Just… [more](https://github.com/jonschlinkert/micromatch)
- ## Run tests
- Install dev dependencies:
- ```sh
- $ 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/extglob/issues/new)
- ## Author
- **Jon Schlinkert**
- + [github/jonschlinkert](https://github.com/jonschlinkert)
- + [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
- ## License
- Copyright © 2015 Jon Schlinkert
- Released under the MIT license.
- ***
- _This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on August 01, 2015._
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