upDuration(keycode, duration) → {boolean}
Returns true if the Key was pressed down within the duration value given, or false if it either isn't down,or was pressed down longer ago than then given duration.
Parameters
Name Type Argument Default Description keycode Phaser.KeyCode | integer The keycode of the key to check, i.e. Phaser.KeyCode.UP or Phaser.KeyCode.SPACEBAR. duration number <optional> 50 The duration within which the key is considered as being just released. Give