A simple jQuery boilerplate.

jquery-boilerplate.js

/*
 *  jQuery Boilerplate - v3.3.2
 *  A jump-start for jQuery plugins development.
 *  http://jqueryboilerplate.com
 *
 *  Made by Zeno Rocha
 *  Under MIT License
 */

// the semi-colon before function invocation is a safety net against concatenated
// scripts and/or other plugins which may not be closed properly.
;(function ( $, window, document, undefined ) {

	// undefined is used here as the undefined global variable in ECMAScript 3 is
	// mutable (ie. it can be changed by someone else). undefined isn't really being
	// passed in so we can ensure the value of it is truly undefined. In ES5, undefined
	// can no longer be modified.

	// window and document are passed through as local variable rather than global
	// as this (slightly) quickens the resolution process and can be more efficiently
	// minified (especially when both are regularly referenced in your plugin).

	// Create the defaults once
	var pluginName = "defaultPluginName",
		defaults = {
		propertyName: "value"
	};

	// The actual plugin constructor
	function Plugin ( element, options ) {
		this.element = element;
		// jQuery has an extend method which merges the contents of two or
		// more objects, storing the result in the first object. The first object
		// is generally empty as we don't want to alter the default options for
		// future instances of the plugin
		this.settings = $.extend( {}, defaults, options );
		this._defaults = defaults;
		this._name = pluginName;
		this.init();
	}

	Plugin.prototype = {
		init: function () {
			// Place initialization logic here
			// You already have access to the DOM element and
			// the options via the instance, e.g. this.element
			// and this.settings
			// you can add more functions like the one below and
			// call them like so: this.yourOtherFunction(this.element, this.settings).
			console.log("xD");
		},
		yourOtherFunction: function () {
			// some logic
		}
	};

	// A really lightweight plugin wrapper around the constructor,
	// preventing against multiple instantiations and allowing any
	// public function (ie. a function whose name doesn't start
	// with an underscore) to be called via the jQuery plugin,
	// e.g. $(element).defaultPluginName('functionName', arg1, arg2)
	$.fn[pluginName] = function ( options ) {
		var args = arguments;

		// Is the first parameter an object (options), or was omitted,
		// instantiate a new instance of the plugin.
		if (options === undefined || typeof options === 'object') {
			return this.each(function () {

				// Only allow the plugin to be instantiated once,
				// so we check that the element has no plugin instantiation yet
				if (!$.data(this, 'plugin_' + pluginName)) {

					// if it has no instance, create a new one,
					// pass options to our plugin constructor,
					// and store the plugin instance
					// in the elements jQuery data object.
					$.data(this, 'plugin_' + pluginName, new Plugin( this, options ));
				}
			});

		// If the first parameter is a string and it doesn't start
		// with an underscore or "contains" the `init`-function,
		// treat this as a call to a public method.
		} else if (typeof options === 'string' && options[0] !== '_' && options !== 'init') {

			// Cache the method call
			// to make it possible
			// to return a value
			var returns;

			this.each(function () {
				var instance = $.data(this, 'plugin_' + pluginName);

				// Tests that there's already a plugin-instance
				// and checks that the requested public method exists
				if (instance instanceof Plugin && typeof instance[options] === 'function') {

					// Call the method of our plugin instance,
					// and pass it the supplied arguments.
					returns = instance[options].apply( instance, Array.prototype.slice.call( args, 1 ) );
				}

				// Allow instances to be destroyed via the 'destroy' method
				if (options === 'destroy') {
					$.data(this, 'plugin_' + pluginName, null);
				}
			});

			// If the earlier cached method
			// gives a value back return the value,
			// otherwise return this to preserve chainability.
			return returns !== undefined ? returns : this;
		}
	};

})( jQuery, window, document );