W3cubDocs

/Web APIs

WakeLockSentinel: released property

The read-only released property of the WakeLockSentinel interface returns a boolean that indicates whether a WakeLockSentinel has been released yet.

Syntax

js

const released = sentinel.released

Value

A boolean value, that is false until the WakeLockSentinel has been released (either through a call to WakeLockSentinel.release() or because the lock has been released automatically) and the release event has been emitted, after which it becomes true and no longer changes.

Examples

This example shows how released's value changes within a WakeLockSentinel's life cycle.

js

const sentinel = await navigator.wakeLock.request("screen");
console.log(sentinel.released); // Logs "false"

sentinel.onrelease = () => {
  console.log(sentinel.released); // Logs "true"
};

await sentinel.release();

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
released 87 87 No No 73 16.4 87 87 No 62 16.4 14.0

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WakeLockSentinel/released