Storage event support

[ghost]

I checked the code, but I haven't found support for the storage event. Maybe I just missed it, but if not, then this is a feature request...

[tofumatt]

You're right, I actually didn't even know there was a storage event! I'm open to adding support for it.

[ghost]

http://dev.w3.org/html5/webstorage/#the-storage-event

[ghost]

I don't think the others have something like that, so I think you can emulate it only by short polling the databases and adding a lastModified timestamp to them.

[ghost]

https://developer.mozilla.org/en-US/docs/Web/API/window.postMessage?redirectlocale=en-US&redirectslug=DOM/window.postMessage
So if you have this postMessage then you don't need to ping the db from every opened window, just from a single one and after that share the information with postMessage.

[ghost]

Other possible solution to share the info between tabs is using a shared webworker...
So I think you should only poll for the last change timstamp from a single window, and share that information with the other tabs with shared webworkers or window.postMessage, or some other intertab communication channels if it is possible... If the db polling window is closed, then the other windows should have an intertab timeout and after that timeout they can automatically choose another db polling window.

[TheNeikos]

Is this still a thing?

[tofumatt]

I don't think there's any interest in it at this point and I don't see the appeal, so I say we close it. If anyone disagrees let me know 😄

[TheNeikos]

Well, one thing that it is really useful for would be for things like these: https://github.com/rt2zz/redux-persist-crosstab

This would make it easier to 'just' make it work, instead of having to use localStorage.

[tofumatt]

Huh, interesting.

Okay, I'll keep it open then. We haven't had any traction on fixing it but after seeing that use-case I'd totally accept a patch! 😄

[thgreasi]

Since we already have https://github.com/localForage/localForage-observable , should this ticket just have cross-tab notification as a pending?

[tofumatt]

Oops, I forgot about that. Yeah, looks like that's all this is really missing.

[thgreasi]

Just opened localForage/localForage-observable#5 to track the cross-tab support. @tofumatt should we close this one and #244 and move the discussion to the plugin's repo?

[tofumatt]

Yeah, I think that's good.

@TheNeikos, please follow localForage/localForage-observable#5 for further updates on this 😄

[thgreasi]

Just opened localForage/localForage-observable#6 for this. Any feedback would be great and could help releasing it during the weekend.