Vanilla JavaScript Bootstrap

vanilla-javascript-bootstrap.js

/**
 * This is small, light weight vanilla JavaScript Bootstrap script.
 * 
 * It comes handy in situations where a framework i.e. jQuery is used only
 * for "load" and "ready" events etc. This small script will not only save 
 * lot of bytes but also gives a basic start on writing object literal JavaScript.
 * 
 * Learn more about object literal JavaScript at following resource:
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Values,_variables,_and_literals
 * 
 * Example demo at: https://gist.github.com/jabranr/7bce230cb1f40580a52c
 * 
 * Inspiration and DOM ready code from http://youmightnotneedjquery.com
 * 
 * MIT License
 * @author: Jabran Rafique <[email protected]>
 * 
 */

 
!(function(root, doc, factory)	{

	/**
	 * Global object to reside inside Window object
	 *
	 * Replace JR with any other prefixes and then
	 * use it accordingly for calling methods from it.
	 * Prefixes are mostly relevant to the current project.
	 */

	window.JR = window.JR || factory(root, doc);

})(this, document, function(window, document)	{
	
	var jr = {

		/**
		 * Multipurpose function to attach event handlers
		 */
		on: function(event, element, callback) {
			if (document.addEventListener)
				element.addEventListener(event, callback, false);
			else
				element.attachEvent('on' + event, callback);
		},


		/**
		 * Method to check if DOM is ready
		 */		
		domReady: function(callback) {
			if (document.addEventListener)
				document.addEventListener('DOMContentLoaded', callback);
			else {
				document.attachEvent('onreadystatechange', function() {
					if (document.readyState === 'interactive')
						callback();
					});
			}
		},


		/**
		 * Method to check if DOM is loaded
		 */
		domLoaded: function(callback) {
			return jr.on('load', window, callback);
		}
	}

	return jr;
});