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# Mousetrap
[](https://cdnjs.com/libraries/mousetrap)
Mousetrap is a simple library for handling keyboard shortcuts in Javascript.
It is licensed under the Apache 2.0 license.
It is around **2kb** minified and gzipped and **4.5kb** minified, has no external dependencies, and has been tested in the following browsers:
- Internet Explorer 6+
- Safari
- Firefox
- Chrome
It has support for `keypress`, `keydown`, and `keyup` events on specific keys, keyboard combinations, or key sequences.
## Getting started
1. Include mousetrap on your page before the closing `</body>` tag
```html
<script src="/path/to/mousetrap.min.js"></script>
```
or install `mousetrap` from `npm` and require it
```js
var Mousetrap = require('mousetrap');
```
2. Add some keyboard events to listen for
```html
<script>
// single keys
Mousetrap.bind('4', function() { console.log('4'); });
Mousetrap.bind("?", function() { console.log('show shortcuts!'); });
Mousetrap.bind('esc', function() { console.log('escape'); }, 'keyup');
// combinations
Mousetrap.bind('command+shift+k', function() { console.log('command shift k'); });
// map multiple combinations to the same callback
Mousetrap.bind(['command+k', 'ctrl+k'], function() {
console.log('command k or control k');
// return false to prevent default browser behavior
// and stop event from bubbling
return false;
});
// gmail style sequences
Mousetrap.bind('g i', function() { console.log('go to inbox'); });
Mousetrap.bind('* a', function() { console.log('select all'); });
// konami code!
Mousetrap.bind('up up down down left right left right b a enter', function() {
console.log('konami code');
});
</script>
```
## Why Mousetrap?
There are a number of other similar libraries out there so what makes this one different?
- There are no external dependencies, no framework is required
- You are not limited to `keydown` events (You can specify `keypress`, `keydown`, or `keyup` or let Mousetrap choose for you).
- You can bind key events directly to special keys such as `?` or `*` without having to specify `shift+/` or `shift+8` which are not consistent across all keyboards
- It works with international keyboard layouts
- You can bind Gmail like key sequences in addition to regular keys and key combinations
- You can programatically trigger key events with the `trigger()` method
- It works with the numeric keypad on your keyboard
- The code is well documented/commented
## Tests
Unit tests are run with <a href="https://mochajs.org/">mocha</a>.
### Running in browser
[View it online](http://rawgit.com/ccampbell/mousetrap/master/tests/mousetrap.html) to check your browser compatibility. You may also download the repo and open `tests/mousetrap.html` in your browser.
### Running with Node.js
1. Install development dependencies
```sh
cd /path/to/repo
npm install
```
3. Run tests
```sh
npm test
```
## Documentation
Full documentation can be found at https://craig.is/killing/mice
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