extending the jQuery class

extends-jquery.coffee

class JQueryInheritor extends jQuery

  constructor: ( arg ) ->
    jQuery.fn.init.call( this, arg );
  
  myMethod = ->
    # do something

extends-jquery.js

function JQueryInheritor( arg ) {
  jQuery.fn.init.call( this, arg );
}

JQueryInheritor.prototype = Object.create( jQuery.prototype );

JQueryInheritor.prototype.myMethod = function(){
  // do something
};