The mouseup event is fired at an Element when a button on a pointing device (such as a mouse or trackpad) is released while the pointer is located inside it.
mouseup events are the counterpoint to mousedown events.
This behavior is different from pointerup events. When using a physical mouse, mouseup events fire whenever any button on a mouse is released. pointerup events fire only upon the last button release; previous button releases, while other buttons are held down, don't fire pointerup events.
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("mouseup", (event) => { })
onmouseup = (event) => { }A MouseEvent. Inherits from UIEvent and Event.
See mousemove event for example code.