Richard Richard - 1 year ago 162
Javascript Question

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

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 of times.

is this syntax the same as

everyTime: function(interval, label, fn, times) {
return this.each(function() {
jQuery.timer.add(this, interval, label, fn, times);
oneTime: function(interval, label, fn) {
return this.each(function() {
jQuery.timer.add(this, interval, label, fn, 1);


$.fn.blink = function(options)

because it looks like the first(without =) is a way to set multiple methods at once.
Is this right?
Also while I am here
What would be the reason to add the elements and some logic to the jquery object?

timer: {
global: [],
guid: 1,
dataKey: "jQuery.timer",

(this is from the timer plugin)

thanks, Richard

Answer Source

jQuery.extend is used to extend any object with additional functions, but jQuery.fn.extend is used to extend the jQuery.fn object, which in fact adds several plugin functions in one go (instead of assigning each function separately).


var obj = { x: function() {} }

jQuery.extend(obj, { y: function() {} });

// now obj is an object with functions x and y


jQuery.fn.extend( {
        x: function() {},
        y: function() {}

// creates 2 plugin functions (x and y)
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