Want to figure out how to add cameras into a scene and switch the active camera with 1-9 on my keyboard

Janusweb doesn't really expose the concept of multiple cameras even though the underlying engine supports it, but one way we could do that is by placing empty objects, eg, <object js_id="camera1" pos="..." rotation="..." /> around the scene wherever you want the camera to be, then set up key bindings where if you press one of the number keys it either sets the player's position to the values stored in those objects, or it reparents the player to the object, eg, room.objects['camera1'].appendChild(player)

appending as a child is nice if you want that object to move, eg, bobbing up and down or following a path