In jQuery, what does $.fn. mean?

Question

In jQuery, what does $.fn. mean? I looked this up on google but couldn't find any concrete examples.

$.fn.something = function{} 

Answer 1

It allows you to extend jQuery with your own functions.

For example,

$.fn.something = function{} 

will allow you to use

$("#element").something() 

$.fn is also synonymous with jQuery.fn which might make your Google searches easier.

See jQuery Plugins/Authoring

Answer 2

This has been covered in some detail here:

Why jQuery do this: jQuery.fn.init.prototype = jQuery.fn?

But the short of it is that $.fn is an alias for $jQuery.prototype