The following is not a mouse event in JavaScript:

KeyboardEvent

KeyboardEvent is a native DOM event that is fired when the user presses or releases a keyboard key. It is not a mouse event.

Other mouse events in JavaScript include:

• click
• dblclick
• mousedown
• mouseup
• mousemove
• mouseover
• mouseout
• contextmenu

Mouse events are used to detect and handle user interaction with the mouse. They can be used to create interactive web applications and games.