Screen.getActiveWindow

Returns the screen’s currently active window.

On X11, this is done by inspecting the _NET_ACTIVE_WINDOW property on the root window, as described in the

If there is no currently currently active window, or the window manager does not support the _NET_ACTIVE_WINDOW hint, this function returns null.

On other platforms, this function may return null, depending on whether it is implementable on that platform.

The returned window should be unrefed using [gobject.object.ObjectWrap.unref] when no longer needed.