BetaThis is mapped to the 'Sneak' button on controllers, keyboards, and touch interfaces. By default, this is shift on a keyboard or B on an Xbox controller. On touch interfaces this will only be pressed for 1 tick or less and then it will be released immediately even if the player holds their finger down. Dismounting a horse or exiting a boat will not send a Sneak button change event.
All the different input buttons that are supported. Use with @minecraft/server.PlayerInput.getButtonState via @minecraft/server.Player.input or PlayerButtonInputAfterEvent via WorldAfterEvents.playerButtonInput