Here is the list of most commonly used jQuery API functions:
- find(): Selects elements based on the provided selector string
- hide(): Hides an element if it was visible
- show(): Shows an element if it was hidden
- html(): Gets or sets an inner HTML of an element
- append() Injects an element into the DOM after the selected element
- prepend() Injects an element into the DOM before the selected element
- on(): Attaches an event listener to an element
- off() Detaches an event listener from an element
- css(): Gets or sets the style attribute value of an element
- attr() Gets or sets any attribute of an element
- val(): Gets or sets the value attribute of an element
- text(): Gets the combined text of an element and its children
- each(): Iterates over a set of matched elements
Agreed about .css I find I use it all the time, especially if I have to inject some height dimensions into a child div. outerWidth and outerHeight are another couple functions I use all the time.