.promise()

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

.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.

.prevAll()

Get all preceding siblings of each element in the set of matched elements, optionally filtered by a selector, in the reverse document order.

.prev()

Get the immediately preceding sibling of each element in the set of matched elements. If a selector is provided, it retrieves the previous sibling only if it matches that selector.