SharedStorageWorkletGlobalScope

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The SharedStorageWorkletGlobalScope interface of the Shared Storage API represents the global scope of a SharedStorageWorklet module.

WorkletGlobalScope SharedStorageWorkletGlobalScope

Instance properties

sharedStorage

Contains an instance of the WorkletSharedStorage object, representing the shared storage for a particular origin as exposed in a worklet context.

Instance methods

register()

Registers an operation defined inside the current worklet module.

Examples

js
// ab-testing-worklet.js
class SelectURLOperation {
  async run(urls, data) {
    // Read the user's experiment group from shared storage
    const experimentGroup = await this.sharedStorage.get("ab-testing-group");

    // Return the group number
    return experimentGroup;
  }
}

register("ab-testing", SelectURLOperation);

See the Shared Storage API landing page for a walkthrough of this example and links to other examples.

Specifications

Specification
Shared Storage API
# sharedstorageworkletglobalscope

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
SharedStorageWorkletGlobalScope
Deprecated
Chrome – Full support
Chrome 126 (Release date: 2024-06-11)
footnote Full support
Edge – Full support
Edge 126 (Release date: 2024-06-13)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 112 (Release date: 2024-07-11)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 126 (Release date: 2024-06-11)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 83 (Release date: 2024-06-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 28 (Release date: 2025-04-02)
footnote Full support
WebView Android – Full support
WebView Android 126 (Release date: 2024-06-11)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
interestGroups
Deprecated
Chrome – Full support
Chrome 134 (Release date: 2025-03-04)
footnote Full support
Edge – Full support
Edge 134 (Release date: 2025-03-06)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 119 (Release date: 2025-05-13)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 134 (Release date: 2025-03-04)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 88 (Release date: 2025-03-19)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 29 (Release date: 2025-10-25)
footnote Full support
WebView Android – Full support
WebView Android 134 (Release date: 2025-03-04)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
register
Deprecated
Chrome – Full support
Chrome 126 (Release date: 2024-06-11)
footnote Full support
Edge – Full support
Edge 126 (Release date: 2024-06-13)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 112 (Release date: 2024-07-11)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 126 (Release date: 2024-06-11)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 83 (Release date: 2024-06-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 28 (Release date: 2025-04-02)
footnote Full support
WebView Android – Full support
WebView Android 126 (Release date: 2024-06-11)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
sharedStorage
Deprecated
Chrome – Full support
Chrome 126 (Release date: 2024-06-11)
footnote Full support
Edge – Full support
Edge 126 (Release date: 2024-06-13)
footnote Full support
Firefox – No support
Firefox
footnote No support
Opera – Full support
Opera 112 (Release date: 2024-07-11)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 126 (Release date: 2024-06-11)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 83 (Release date: 2024-06-25)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 28 (Release date: 2025-04-02)
footnote Full support
WebView Android – Full support
WebView Android 126 (Release date: 2024-06-11)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support

Legend

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

Full support
Full support
No support
No support
Deprecated. Not for use in new websites.

See also