Transient activation

Transient activation (or “transient user activation”) is a window state that indicates a user has recently directly and meaningfully interacted with the window.

The state is enabled following any user interaction, when the window has focus, that results in the browser generating one or more of the following:

A mousedown or pointerdown event for a mouse. A pointerup event for any other kind of pointer. A touchend event. A keydown event, other than for the escape or browser shortcut keys.

The window is not user-activated by events that aren’t necessarily caused by intentional interaction with the window, such as mouse move events or wheel events.