Event when Raycast hits nothing

[IRobot1]

I've been digging through the NGT event system. It includes a default ray caster that dispatches events to the appropriate object listeners.

I've been working on an in-scene user interface that has popups.

In the browser, if you click outside the popup it will close. However, the ray caster doesn't generate any events unless you click on something in the scene.

Is there any event that I can listen on when the ray caster hits nothing? If not, can a 'nothinghit' event just be forwarded to the scene object?

If you support the idea, can you provide some hints on where I could make the code change?
Thanks

[IRobot1]

Found it! Objects can implement event handler for pointermissed event. The raycaster dispatches this event to any listening object when nothing is hit.

(pointermissed)="missed()"