.map()

Pass each element in the current matched set through a function, producing a new jQuery object containing the return values.

.promise()

Return a Promise object to observe when all actions of a certain type bound to the collection, queued or not, have finished.

.hover()

Bind one or two handlers to the matched elements, to be executed when the mouse pointer enters and leaves the elements.

jQuery.cssHooks

Hook directly into jQuery to override how particular CSS properties are retrieved or set, normalize CSS property naming, or create custom properties.