.text()

Get the combined text contents of each element in the set of matched elements, including their descendants, or set the text contents of the matched elements.

.promise()

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

jQuery.cssHooks

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

jQuery.Deferred()

A factory function that returns a chainable utility object with methods to register multiple callbacks into callback queues, invoke callback queues, and relay the success or failure state of any synchronous or asynchronous function.