The RelativeOrientationSensor interface of the Sensor APIs describes the device's physical orientation without regard to the Earth's reference coordinate system.

To use this sensor, the user must grant permission to the 'accelerometer', and 'gyroscope' device sensors through the Permissions API.

If a feature policy blocks use of a feature it is because your code is inconsistent with the policies set on your server. This is not something that would ever be shown to a user. The Feature-Policy HTTP header article contains implementation instructions.

EventTarget Sensor OrientationSensor RelativeOrientationSensor



Creates a new RelativeOrientationSensor object.


No specific properties; inherits properties from its ancestors OrientationSensor and Sensor.


No specific methods; inherits methods from its ancestors OrientationSensor and Sensor.


No specific events; inherits events from its ancestor, Sensor.


Basic Example

The following example, which is loosely based on Intel's Orientation Phone demo, instantiates an RelativeOrientationSensor with a frequency of 60 times a second.

Note: The Intel demo this is based on uses the AbsoluteOrientationSensor. On each reading it uses OrientationSensor.quaternion to rotate a visual model of a phone.

const options = { frequency: 60, referenceFrame: 'device' };
const sensor = new RelativeOrientationSensor(options);

sensor.addEventListener('reading', () => {
  // model is a Three.js object instantiated elsewhere.
sensor.addEventListener('error', (error) => {
  if ( === 'NotReadableError') {
    console.log("Sensor is not available.");

Permissions Example

Using orientation sensors requires requesting permissions for multiple device sensors. Because the Permissions interface uses promises, a good way to request permissions is to use Promise.all.

const sensor = new RelativeOrientationSensor();
Promise.all([navigator.permissions.query({ name: "accelerometer" }),
             navigator.permissions.query({ name: "gyroscope" })])
       .then((results) => {
         if (results.every((result) => result.state === "granted")) {
           // ...
         } else {
           console.log("No permissions to use RelativeOrientationSensor.");


Orientation Sensor
# relativeorientationsensor-interface

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