KeyCode Constants

# Using npm
$ npm install keycode-js --save

# Using Yarn
$ yarn add keycode-js

# Using Bower
$ bower install keycode-js --save

var KeyCode = require('keycode-js');

// ES2015+
import KeyCode from 'keycode-js';

<script type="text/javascript" src="/path/to/keycode-js/dist/keycode.min.js"></script>

window.addEventListener('keyup', function(e) {
    if (e.keyCode === KeyCode.KEY_RETURN) {
        console.log('It was the Return key.');
    } else {
        console.log('It was any other key.');
    }
});