Event

The event type is a string that specifies what kind of event occurred. The type “mouse- move”, for example, means that the user moved the mouse.

The event target is the object on which the event occurred or with which the event is associated.

An event handler or event listener is a function that handles or responds to an event.

An event object is an object that is associated with a particular event and contains details about that event

Event propagation is the process by which the browser decides which objects to trigger event handlers on.

event capturing, handlers specially registered on container elements have the opportunity to intercept (or “capture”) events before they are delivered to their actual target.