The DeviceLightEvent provides web developers with information from photo sensors or similiar detectors about ambient light levels near the device. For example this may be useful to adjust the screen's brightness based on the current ambient light level in order to save energy or provide better readability.
The value property provides the current level of the ambient light.
Returns the rotation of the device around the Z axis; that is, the number of degrees by which the device is being twisted around the center of the screen. See Orientation and motion data explained for details.
Returns the rotation of the device around the X axis; that is, the number of degrees, ranged between -180 and 180,  by which the device is tipped forward or backward. See Orientation and motion data explained for details.
The Gamepad.axes property of the Gamepad interface returns an array representing the controls with axes present on the device (e.g. analog thumb sticks).-
The Gamepad.buttons property of the Gamepad interface returns an array of gamepadButton objects representing the buttons present on the device.
The Gamepad.connected property of the Gamepad interface returns a boolean indicating whether the gamepad is still connected to the system.
The Gamepad.id property of the Gamepad interface returns a string containing some information about the controller.
The Gamepad.index property of the Gamepad interface returns an integer that is auto-incremented to be unique for each device currently connected to the system.
The Gamepad.mapping property of the Gamepad interface returns a string indicating whether the browser has remapped the controls on the device to a known layout.
The Gamepad.timestamp property of the Gamepad interface returns a DOMHighResTimeStamp representing the last time the data for this gamepad was updated.
The GamepadButton interface defines an individual button of a gamepad or other controller, allowing access to the current state of different types of buttons available on the control device.
The GamepadButton.pressed property of the GamepadButton interface returns a boolean indicating whether the button is currently pressed (true) or unpressed (false).
The GamepadButton.value property of the GamepadButton interface returns a double value used to represent the current state of analog buttons on many modern gamepads, such as the triggers.
The Window.onuserproxymity property represents an EventHandler, that is a function to be called when the userproximity event occurs. These events are of type UserProximityEvent and occur when the the device sensor detects that an object becomes nearby.
Returns the rotation of the device around the Y axis; that is, the number of degrees, ranged between -90 and 90, by which the device is turned left or right. See Orientation and motion data explained for details.