Can I sync data between tabs in different domains

The key limitations are:

1. Same-Origin Policy: The "storage" event and the browser's storage APIs (localStorage, sessionStorage) are subject to the same-origin policy. This means the event is only triggered in other tabs/windows that are from the same domain, not across different domains.

2. Cross-Domain Communication: There is no built-in browser mechanism to directly communicate data changes between tabs or windows across different domains. The same-origin policy prevents this kind of cross-domain communication for security reasons.

If you need to sync data between tabs or windows across different domains, you would need to use a server-side solution or a third-party service that can act as an intermediary. Some options include:

1. Server-Side Synchronization: You can use a server-side mechanism, like a web socket connection or a shared database, to propagate data changes between the different domains.

2. Third-Party Messaging Service: You can use a third-party messaging service, like Firebase, to publish and subscribe to data changes across different domains.

3. Custom Cross-Domain Communication: You can implement a custom cross-domain communication mechanism, such as using the HTML5 postMessage API in combination with an intermediary iframe or window.

However, these solutions are more complex and require additional infrastructure or third-party services. The built-in browser storage and events are limited to same-origin communication only.

In summary, you cannot directly sync data between tabs in different domains using the browser's built-in storage and events. You would need to use a server-side or third-party solution to achieve cross-domain data synchronization.