Magnetometer()

The Magnetometer() constructor creates a new Magnetometer object which returns information about the magnetic field as detected by a device's primary magnetometer sensor.

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.

options Optional

Options are as follows:

• frequency: The desired number of times per second a sample should be taken, meaning the number of times per second that the reading event will be called. A whole number or decimal may be used, the latter for frequencies less than a second. The actual reading frequency depends on device hardware and consequently may be less than requested.
• referenceFrame: Either 'device' or 'screen'. The default is 'device'.

• reading event