Category	Object	Returns	Example	Description
User Agent	jQuery.boxModel	Boolean	jQuery.boxModel	Deprecated in jQuery 1.3 (see jQuery.support). States if the current page, in the user's browser, is being rendered using the W3C CSS Box Model.
User Agent	jQuery.browser	Map	jQuery.browser	We recommend against using this property, please try to use feature detection instead (see jQuery.support). Contains flags for the useragent, read from navigator.userAgent. While jQuery.browser will not be removed from future versions of jQuery, every effort to use jQuery.support and proper feature detection should be made.
User Agent	jQuery.browser.version	String	jQuery.browser.version	The version number of the rendering engine for the user's browser.
Data	.clearQueue( [ queueName ] )	jQuery	-	New 1.4 Remove from the queue all items that have not yet been run
Array and Object operations	jQuery.contains( container, contained )	Boolean	jQuery.contains( container, contained )	New 1.4 Check to see if a DOM node is within another DOM node.
Data	jQuery.data( element, key, value )	jQuery	-	Store arbitrary data associated with the specified element.
Data	jQuery.data( element, key )	Object	-	Returns value at named data store for the element, as set by jQuery.data(element, name, value), or the full data store for the element.
Data	jQuery.data()	Object	jQuery.data()	New 1.4 Returns value at named data store for the element, as set by jQuery.data(element, name, value), or the full data store for the element.
Data	.dequeue( [ queueName ] )	jQuery	.dequeue( [ queueName ] )	Execute the next function on the queue for the matched elements
Data	jQuery.dequeue([ queueName ])	jQuery	jQuery.dequeue([ queueName ])	Execute the next function on the queue for the matched elements
Array and Object operations	jQuery.each( collection, callback(indexInArray, valueOfElement) )	Object	jQuery.each( collection, callback(indexInArray, valueOfElement) )	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.
Array and Object operations	jQuery.extend( target, [ object1 ], [ objectN ] )	Object	jQuery.extend( target, [ object1 ], [ objectN ] )	Merge the contents of two or more objects together into the first object.
Array and Object operations	jQuery.extend( [ deep ], target, object1, [ objectN ] )	Object	jQuery.extend( [ deep ], target, object1, [ objectN ] )	Merge the contents of two or more objects together into the first object.
Array and Object operations	jQuery.grep( array, function(elementOfArray, indexInArray), [ invert ] )	Array	jQuery.grep( array, function(elementOfArray, indexInArray), [ invert ] )	Finds the elements of an array which satisfy a filter function. The original array is not affected.
Custom	jQuery.globalEval( code )	-	jQuery.globalEval( code )	Execute some JavaScript code globally.
Array and Object operations	jQuery.inArray( value, array )	Number	jQuery.inArray( value, array )	Determine the index of the first parameter in the Array (-1 if not found)
Array and Object operations	jQuery.isArray( obj )	Boolean	jQuery.isArray( obj )	Determine whether the argument is an array.
Custom	jQuery.isEmptyObject( object )	Boolean	jQuery.isEmptyObject( object )	New 1.4 Check to see if an object is empty (contains no properties).
Test operations	jQuery.isFunction( obj )	Boolean	jQuery.isFunction(obj)	Determine if the argument passed is a Javascript function object.
Test operations	jQuery.isPlainObject( obj )	Boolean	jQuery.isPlainObject(obj)	Check to see if an object is a plain object (created using '{}' or 'new Object').
Test operations	jQuery.isXMLDoc( node )	Boolean	jQuery.isXMLDoc(node)	Check to see if a DOM node is within an XML document (or is an XML document).
Array and Object operations	jQuery.makeArray( obj )	Array	jQuery.makeArray( obj )	Convert an array-like object into a true JavaScript array.
Array and Object operations	jQuery.map( array, callback(elementOfArray, indexInArray) )	Array	jQuery.map( array, callback(elementOfArray, indexInArray) )	Translate all items in an array or array-like object to another array of items.
Array and Object operations	jQuery.merge( first, second )	Array	jQuery.merge( first, second )	Merge the contents of two arrays together into the first array.
Array and Object operations	jQuery.noop()	Function	jQuery.noop()	New 1.4 An empty function.
Event Helpers	jQuery.proxy( function, scope )	jQuery	jQuery.proxy( function, scope )	New 1.4 Takes a function and returns a new one that will always have a particular scope.
Event Helpers	jQuery.proxy( scope, name )	jQuery	jQuery.proxy( scope, name )	New 1.4 Takes a function and returns a new one that will always have a particular scope.
Data	.queue( [ queueName ] )	Array	-	Show the queue of functions to be executed on the matched elements
Data	.queue( [ queueName ], newQueue )	jQuery	-	Manipulate the queue of functions to be executed on the matched elements
Data	jQuery.queue( [ queueName ] )	Array	-	Show the queue of functions to be executed on the matched elements
Data	jQuery.queue( [ queueName ], newQueue )	jQuery	-	Manipulate the queue of functions to be executed on the matched elements.
Data	jQuery.queue( [ queueName ], callback() )	jQuery	-	Manipulate the queue of functions to be executed on the matched elements.
Data	jQuery.removeData( [ name ] )	jQuery	-	Remove a previously-stored piece of data.
Array and Object operations	jQuery.support	Object	jQuery.support	A collection of properties that represent the presence of different browser features or bugs.
String operations	jQuery.trim( str )	String	jQuery.trim( str )	Remove the whitespace from the beginning and end of a string.
Array and Object operations	jQuery.unique( array )	Array	jQuery.unique( array )	Create a copy of an array of DOM elements with the duplicates removed. Note that this only works on arrays of DOM elements, not strings or numbers.