10. (this) this.each() $.fn.pluginName = function() { this.each(function() { // Do something }); }; 11. (this) this.each() $.fn.pluginName = function() { this.each(function() { // Do something }); }; $(elem).pluginName(); ↑ this 12. $.fn.pluginName = function(options) { var o = $.extend({ propName1: value1, propName2: value2 }, options); this.each(function() { // Do something }); };