.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.

.is()

Check the current matched set of elements against a selector, element, or jQuery object and return true if at least one of these elements matches the given arguments.

.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.

.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.

.find()

Get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element.