WakeLock.request()

Draft: This page is not complete.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The request() method of the WakeLock interface returns a Promise that resolves with a WakeLockSentinel object, which allows control over screen dimming and locking.

Syntax

var wakeLock = navigator.wakeLock.request(type);

Parameters

type

Options are as follows:

  • 'screen': Requests a screen wake lock. Prevents devices from dimming or locking the screen.

Return value

A Promise that resolves with a WakeLockSentinel object.

Exceptions

NotAllowedError

Thrown when wake lock is not available, which can happen because:

  • Document is not allowed to use screen wake lock due to screen-wake-lock policy.
  • Document is not fully active.
  • Document is hidden.
  • User Agent could not acquire platform's wake lock.

Examples

The following asynchronous function requests a WakeLockSentinel object. The request() method is wrapped in a try...catch statement to account for if the browser refuses the request for any reason.

const requestWakeLock = async () => {
  try {

    const wakeLock = await navigator.wakeLock.request('screen');

  } catch (err) {
    // The wake lock request fails - usually system-related, such as low battery.

    console.log(`${err.name}, ${err.message}`);
  }
}

requestWakeLock();

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
request
84
84
No
No
Yes
No
84
84
No
Yes
No
14.0

See also

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WakeLock/request