Optional
Radial deadzone applied to stick pairs (axes 0,1 and 2,3). Value in [0, 1]. Default: 0.15.
Custom poll function returning up to 4 gamepad slots. Defaults to navigator.getGamepads(). Primarily an injection point for tests; in the browser the default is correct.
navigator.getGamepads()
Radial deadzone applied to stick pairs (axes 0,1 and 2,3). Value in [0, 1]. Default: 0.15.