How is jQuery's $ a function and an object?

Question

I mean object as in {} [object Object]. How does it do $(selector) and $.fn.init at the same time?

Can you give me a simple ex

Answer 1

$ is a function. a method of $ can return any thing.

For example:

$ = function() {
     return {
                 foo : function() { return 'baa'; },
                 r1: 1,
                 r2 : 'string'
            }
};

typeof $ <- function 
typeof $() <- object
typeof $().foo <- function 
typeof $().foo() <- string
typeof $().r1; <- number 
typeof $().r2 <- string