Simple refresh page when sw detects offline

[ThatOneCalculator]

Summary

Right now, when Misskey's offline, it just shows a single line message:

misskey/packages/sw/src/sw.ts

Line 29 in ebc2566

.catch(() => new Response(`Offline. Service Worker @${_VERSION_}`, { status: 200 }))

If there's a way it could instead respond with a basic page like this, it'd be a lot more user friendly:

[Johann150]

I think it might also be nice to show the reason why the service worker thinks you are offline. Because currently any fetch error will cause the service worker to think you are offline.

Noticed this when I did not renew my TLS certificate on time and got the "Offline" screen.

[tamaina]

fetchは、サーバーが4xxや5xxを応答した時はresolveになります。fetchがreject(error)になるのは、(主としてユーザーの)回線に問題があるときです。これはofflineと言っていい状況です。

[YokaiRick]

@ThatOneCalculator dunno if i understand you correctly, but you actually can already set a warning page like you suggested:

---

[Johann150]

That warning will only be shown when the web client detects that the server goes offline while you are already using the client. The service worker error shown above would be shown when the server is already offline when you navigate to the website and the service worker is already cached in your browser.