The x read-only property of the Accelerometer interface returns a double precision integer containing the acceleration 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 xAcceleration = accelerometer.x


A Number.


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

let accelerometer = new Accelerometer({frequency: 60});

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


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

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
xChrome Full support 69Edge Full support ≤79Firefox No support NoIE No support NoOpera Full support 56Safari No support NoWebView Android Full support 69Chrome Android Full support 69Firefox Android No support NoOpera Android Full support 48Safari iOS No support NoSamsung Internet Android Full support 10.0


Full support
Full support
No support
No support