callbacks.has()

Determine whether or not the list has any callbacks attached. If a callback is provided as an argument, determine whether it is in a list.

.closest()

For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.

.css()

Get the value of a computed style property for the first element in the set of matched elements or set one or more CSS properties for every matched element.

.data()

Store arbitrary data associated with the matched elements or return the value at the named data store for the first element in the set of matched elements.