How to add new methods to the jQuery object?

Question

Is there some way to add methods to jQuery\'s objects?

For example, I have jQuery object

a = $(\'div\')

I\'d like that every object

Answer 1

add it like

$.fn.doSomething = function(data){
    // data is the argument passed to doSomething
    return this.each(function(){
       var elem = $(this);
       //perform operation on elem
       // like to change background color use
       elem.css('background-color','red');

    });
}