WakeLockSentinel.onrelease

The onrelease property of the WakeLockSentinel is fired when the sentinel object's handle has been released.

A WakeLockSentinel can be released manually via the release() method, or automatically via the platform wake lock. This can happen if the document becomes inactive or looses visibility, if the device is low on power or the user turns on a power save mode.

This interface inherits from the Event interface.

This example updates the UI should the wake lock be released.

wakeLock.addEventListener('release', () => {

  // if wake lock is released alter the UI accordingly

  statusElement.textContent = 'Wake Lock has been released';
});