jQuery plugin pattern that attaches a class instance to the element. Inspired by http://coding.smashingmagazine.com/2011/10/11/essential-jquery-plugin-patterns.

jquery_plugin.coffee

(($) ->

  pluginName = 'pluginName'
  defaults = {
    prop: 'value'
  }

  class Plugin
    constructor: (element, options) ->
      @el = element; @$el = $(element)
      @options = $.extend({}, defaults, options)
      @init()

    init: ->
      # intialization stuff goes here

  $.fn[pluginName] = (optionsOrMethod) ->
    @each ->
      plugin = $.data(this, "plugin_#{pluginName}")

      if typeof optionsOrMethod is 'object'
        unless plugin
          $.data(this, "plugin_#{pluginName}", new Plugin(this, optionsOrMethod))
      else
        plugin[optionsOrMethod](Array::slice.call(arguments, 1))

)(jQuery)