JQuery class selector vs id selector

Question

I have 7 different buttons that all perform the same javascript function on click. should i use class selector or id selector.

$(\"input.printing\").on(\"c         


        

Answer 1

Selecting just by Id is faster than selecting by class in general since jQuery under the hood uses getElementById which is faster in most browsers. Please refer to this article for more information as it shows many other ways to improve performance related to Jquery. However, please remember selector performance is not the only thing that you have to be concerned about. Attaching to many unnecessary event could also create performance issue. To mitigate around this problem you could use delegate please see this jQuery documentation for more information regarding delegate.