The x read-only property of the Gyroscope interface returns a double precision integer containing the angular velocity of the device along the its x axis.

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. See Feature-Policy for implementation instructions.


var x = gyroscope.x


A Number.


The gyroscope is typically read in the Sensor.onreading event callback. In the example below this occurs sixty times a second.

let gyroscope = new Gyroscope({frequency: 60});

gyroscope.addEventListener('reading', e => {
  console.log("Angular velocity along the X-axis " + gyroscope.x);
  console.log("Angular velocity along the Y-axis " + gyroscope.y);
  console.log("Angular velocity along the Z-axis " + gyroscope.z);


Specification Status Comment
Generic Sensor API Candidate Recommendation Defines sensors in general.
GyroscopeThe definition of 'x' in that specification. Candidate Recommendation

Browser compatibility

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
x Chrome

Full support 67


Full support 79


No support No


No support No


Full support 54


No support No

WebView Android

Full support 67

Chrome Android

Full support 67

Firefox Android

No support No

Opera Android

Full support 48

Safari iOS

No support No

Samsung Internet Android

Full support 9.0


Full support  
Full support
No support  
No support