jQuery
jQuery object instance.
Description
A jQuery instance is an instance of the jQuery object. Although, technically, this is an object primitive, is it useful to define this type to indicate where a jQuery instance is expected / returned.
A jQuery instance is created from the jQuery (often aliased to $) constructor - for example $('#example'). The jQuery object provides a number of methods for operating on the DOM elements in the document.
A full description of the jQuery type is available in the jQuery documentation.
Use in DataTables
As of DataTables 3, jQuery is not required to run (while in previous versions it was a hard dependency), DataTables 3 still supports the use of jQuery for backwards compatibility.
Where a parameter is shown as accepting a jQuery type, or a method returning a jQuery type, it indicates that a jQuery value is accepted / returned. It should be noted as well that if a method accepts an array of nodes, a jQuery object could be given, since it is array-like.