jQuery.contains()

Check to see if a DOM element is a descendant of another DOM element.

jQuery.data()

Store arbitrary data associated with the specified element and/or return the value that was set.

jQuery.each()

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.

jQuery.extend()

Merge the contents of two or more objects together into the first object.

jQuery.fn.extend()

Merge the contents of an object onto the jQuery prototype to provide new jQuery instance methods.

jQuery.grep()

Finds the elements of an array which satisfy a filter function. The original array is not affected.

jQuery.inArray()

Search for a specified value within an array and return its index (or -1 if not found).

jQuery.isPlainObject()

Check to see if an object is a plain object (created using “{}” or “new Object”).

jQuery.isXMLDoc()

Check to see if a DOM node is within an XML document (or is an XML document).

jQuery.map()

Translate all items in an array or object to new array of items.

jQuery.merge()

Merge the contents of two arrays together into the first array.

jQuery.queue()

Show or manipulate the queue of functions to be executed on the matched element.

jQuery.unique()

Sorts an array of DOM elements, in place, with the duplicates removed. Note that this only works on arrays of DOM elements, not strings or numbers.

jQuery.uniqueSort()

Sorts an array or an array-like object of DOM elements, in place, with the duplicates removed. Note that this only works on arrays/array-likes of DOM elements, not strings or numbers.

.queue()

Show or manipulate the queue of functions to be executed on the matched elements.

.uniqueSort()

Sorts a jQuery object of DOM elements, in place, with the duplicates removed. Note that this only works on jQuery objects consisting of DOM elements, not strings or numbers.