Difference between jQuery.extend and jQuery.fn.extend?

Question

I am trying to understand the jquery plugin syntax, because I want to merge two plugins into one. The blinker that also needs to be able to stop de interval or run a number

Answer 1

jQuery.extend({
    abc: function(){
        alert('abc');
    }
});

usage: $.abc(). (No selector required like $.ajax().)

jQuery.fn.extend({
    xyz: function(){
        alert('xyz');
    }
});

usage: $('.selector').xyz(). (Selector required like $('#button').click().)

Mainly it is used to implement $.fn.each().

I hope it helps.