1. Web
  2. Web APIs
  3. LockManager

LockManager

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2022.

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

Note: This feature is available in Web Workers.

The LockManager interface of the Web Locks API provides methods for requesting a new Lock object and querying for an existing Lock object. To get an instance of LockManager, call navigator.locks.

Instance methods

LockManager.request()

Requests a Lock object with parameters specifying its name and characteristics.

LockManager.query()

Returns a Promise that resolves with an object that contains information about held and pending locks.

Specifications

Specification
Web Locks API
# api-lock-manager

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Node.js
LockManager
Chrome – Full support
Chrome 69 (Release date: 2018-09-04)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – Full support
Firefox 96 (Release date: 2022-01-11)
footnote Full support
Opera – Full support
Opera 56 (Release date: 2018-09-25)
footnote Full support
Safari – Full support
Safari 15.4 (Release date: 2022-03-14)
footnote Full support
Chrome Android – Full support
Chrome Android 69 (Release date: 2018-09-04)
footnote Full support
Firefox for Android – Full support
Firefox for Android 96 (Release date: 2022-01-11)
footnote Full support
Opera Android – Full support
Opera Android 48 (Release date: 2018-11-08)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Samsung Internet – Full support
Samsung Internet 10 (Release date: 2019-08-22)
footnote Full support
WebView Android – Full support
WebView Android 69 (Release date: 2018-09-04)
footnote Full support
WebView on iOS – Full support
WebView on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Node.js – Full support
Node.js 24.5 (Release date: 2025-07-31)
footnote Full support
query
Chrome – Full support
Chrome 69 (Release date: 2018-09-04)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – Full support
Firefox 96 (Release date: 2022-01-11)
footnote Full support
Opera – Full support
Opera 56 (Release date: 2018-09-25)
footnote Full support
Safari – Full support
Safari 15.4 (Release date: 2022-03-14)
footnote Full support
Chrome Android – Full support
Chrome Android 69 (Release date: 2018-09-04)
footnote Full support
Firefox for Android – Full support
Firefox for Android 96 (Release date: 2022-01-11)
footnote Full support
Opera Android – Full support
Opera Android 48 (Release date: 2018-11-08)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Samsung Internet – Full support
Samsung Internet 10 (Release date: 2019-08-22)
footnote Full support
WebView Android – Full support
WebView Android 69 (Release date: 2018-09-04)
footnote Full support
WebView on iOS – Full support
WebView on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Node.js – Full support
Node.js 24.5 (Release date: 2025-07-31)
footnote Full support
request
Chrome – Full support
Chrome 69 (Release date: 2018-09-04)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – Full support
Firefox 96 (Release date: 2022-01-11)
footnote Full support
Opera – Full support
Opera 56 (Release date: 2018-09-25)
footnote Full support
Safari – Full support
Safari 15.4 (Release date: 2022-03-14)
footnote Full support
Chrome Android – Full support
Chrome Android 69 (Release date: 2018-09-04)
footnote Full support
Firefox for Android – Full support
Firefox for Android 96 (Release date: 2022-01-11)
footnote Full support
Opera Android – Full support
Opera Android 48 (Release date: 2018-11-08)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Samsung Internet – Full support
Samsung Internet 10 (Release date: 2019-08-22)
footnote Full support
WebView Android – Full support
WebView Android 69 (Release date: 2018-09-04)
footnote Full support
WebView on iOS – Full support
WebView on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Node.js – Full support
Node.js 24.5 (Release date: 2025-07-31)
footnote Full support

Tip: you can click/tap on a cell for more information.

Full support

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