Merge the contents of two or more objects together into the first object. When two or more object arguments are supplied to $.extend(), properties from all of the objects are added to the target object. Arguments that are null or undefined are ignored. If only one argument is supplied to $.extend(), this means the target argument was omitted. In this case, the jQuery object itself is assumed to be the target. By doing this, you can add new functions t

Merge the contents of an object onto the jQuery prototype to provide new jQuery instance methods. The jQuery.fn.extend() method extends the jQuery prototype ($.fn) object to provide new methods that can be chained to the jQuery() function. jQuery.fn.extend( object ) version added: 1.0 object

Takes a string and throws an exception containing it. This method exists primarily for plugin developers who wish to override it and provide a better display (or more information) for the error messages. jQuery.error( message ) version added: 1.4.1 message String

A generic iterator function, which can be used to seamlessly iterate over both objects and arrays. Arrays and array-like objects with a length property (such as a function's arguments object) are iterated by numeric index, from 0 to length-1. Other objects are iterated via their named properties. The $.each() function is not the same as $(selector).each(), which is used to iterate, exclusively, over a jQuery object. The $.each() function can be used t

Load JSON-encoded data from the server using a GET HTTP request. This is a shorthand Ajax function, which is equivalent to: $.ajax({ dataType: "json", url: url, data: data, success: success }); Data that is sent to the server is appended to the URL as a query string. If the value of the data parameter is a plain object, it is converted to a string and url-encoded before it is appended to the URL. Most implementations will specify a success han

Load a JavaScript file from the server using a GET HTTP request, then execute it. This is a shorthand Ajax function, which is equivalent to: $.ajax({ url: url, dataType: "script", success: success }); The script is executed in the global context, so it can refer to other variables and use jQuery functions. Included scripts can have some impact on the current page. Success Callback The callback is fired once the script has been loaded but not n

Execute the next function on the queue for the matched element. Note: This is a low-level method, you should probably use .dequeue() instead. When jQuery.dequeue() is called, the next function on the queue is removed from the queue, and then executed. This function should in turn (directly or indirectly) cause jQuery.dequeue() to be called, so that the sequence can continue. jQuery.dequeue( element [, queueName ]

States if the current page, in the user's browser, is being rendered using the W3C CSS Box Model. This property was removed in jQuery 1.8. Please try to use feature detection instead. jQuery.boxModel version added: 1.0

Check to see if a DOM element is a descendant of another DOM element. The $.contains() method returns true if the DOM element provided by the second argument is a descendant of the DOM element provided by the first argument, whether it is a direct child or nested more deeply. Otherwise, it returns false. Only element nodes are supported; if the second argument is a text or comment node, $.contains() will return false. Note: The first argument must be

An object containing all CSS properties that may be used without a unit. The .css() method uses this object to see if it may append px to unitless values. You can think about jQuery.cssNumber as a list of all CSS properties you might use without a unit. It's used by .css() to determine if it needs to add px to unitless values. The keys of the jQuery.cssNumber object are camel-cased and the values are all set to true. If you want to prevent the .css()