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# [enquire.js](http://wickynilliams.github.com/enquire.js/) - Awesome Media Queries in JavaScript
[](https://travis-ci.org/WickyNilliams/enquire.js)
`enquire.js` is a lightweight, pure javascript library (with **no dependencies**) for programmatically responding to media queries.
## Getting enquire.js
### Download
Get the latest build, ready to go:
* [Development](https://github.com/WickyNilliams/enquire.js/raw/master/dist/enquire.js) - unminified
* [Production](https://github.com/WickyNilliams/enquire.js/raw/master/dist/enquire.min.js) - minified
### Install via Bower
To install via bower, enter the following at the command line:
bower install enquire
### Install via npm
To install via npm, enter the following at the command line:
npm install enquire.js
### Build From Source
If you want build from source (and run all unit tests etc):
git clone git://github.com/WickyNilliams/enquire.js.git
cd enquire.js
npm install
grunt
Booya!
## Quick Start
The main method you will be dealing with is `register`. It's basic signature is as follows:
```javascript
enquire.register(query /* string */, handler /* object || array || function */);
```
`query` is the CSS media query you wish to respond to, and `handler` is an object containing any logic to handle the query. An example of usage is as follows:
```javascript
enquire.register("screen and (max-width:1000px)", {
match : function() {}, // OPTIONAL
// If supplied, triggered when the media query transitions
// *from an unmatched to a matched state*
unmatch : function() {}, // OPTIONAL
// If supplied, triggered when the media query transitions
// *from a matched state to an unmatched state*.
// Also may be called when handler is unregistered (if destroy is not available)
setup : function() {}, // OPTIONAL
// If supplied, triggered once immediately upon registration of the handler
destroy : function() {}, // OPTIONAL
// If supplied, triggered when handler is unregistered. Place cleanup code here
deferSetup : true // OPTIONAL, defaults to false
// If set to true, defers execution the setup function
// until the media query is first matched. still triggered just once
});
```
This should be enough to get you going, but **please read the full [enquire.js documentation](http://wickynilliams.github.com/enquire.js/)** if you wish to learn about the other cool features.
## Contributing
* Got an awesome idea?
* Found a *not-so*-awesome bug?
* Wish to get my attention through an inappropriate communication channel?!
Then please don't hesitate to raise an issue, they will *all* be looked at and tended to.
And for all the cool cats who are prepared to give their time to contribute code, feel free to open a pull request. If you could write unit tests to accompany your pull request that would be pretty sweet, but no worries if not - if it's good enough to be merged in, it's good enough for me to spend a little time to write tests on your behalf :-)
## License
License: MIT (http://www.opensource.org/licenses/mit-license.php)