The button on the Cardboard headset is only exposed via a simulated click event. WebVR authors should be able to use the same API regardless of the controller. For WebVR 1.1, this is the Gamepad API. Thus, we should expose a one-button 0-DoF gamepad.
This is also necessary before we can deprecate the click event ( issue 716571 ).
Note: The Daydream controller is already exposed as a gamepad.
Comment 1 by billorr@chromium.org
, May 10 2017