Window: sharedStorage property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

The global read-only sharedStorage property returns the WindowSharedStorage object for the current origin. This is the main entry point for writing data to shared storage using the Shared Storage API.

Note: sharedStorage is not available inside workers. It is implemented by Window and is also available in shared storage worklets (see SharedStorageWorkletGlobalScope.sharedStorage, which returns WorkletSharedStorage).

Value

A WindowSharedStorage object instance.

Examples

js
window.sharedStorage
  .set("ab-testing-group", "0")
  .then(console.log("Value saved to shared storage"));

Specifications

Specification
Shared Storage API
# dom-window-sharedstorage

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
sharedStorage
Experimental

Legend

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

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also