Question: Is it possible to change the domain on which the worker is registered?

[gCardinal]

I am running my app in a Docker container and routing to it via a global a local nginx container and dnsmasq. In short, the app runs on the url, for example, http://crew.shadowshifts.local.majisti.com/. However, it seems like there is no way to have the service worker register on this URL, which causes issues I have wrongly though solved in #796.

When I run via a localhost, the service worker registers properly.

Non-locahost URL
Localhost URL

[kettanaito]

Hey, @gCardinal.

There are multiple service worker options you can configure when calling worker.start(). It looks like in your case the serviceWorker.url may be useful:

worker.start({
  serviceWorker: {
    url: IS_DOCKER
      ? 'http://crew.shadowshifts.local.majisti.com/mockServiceWorker.js'
      : '/mockServiceWorker.js'
  }
})

Note that the worker script must be served from the same domain that your application where you intend to use MSW.

[gCardinal]

I had seen the url option, but it didn't work. Turns out, if you're not running from localhost, you need to be using HTTPS or the service worker won't be registered in the browser.

Your answer did point me in the right direction, thank you.

[kettanaito]

My bad, I didn't realize we weren't in a localhost context anymore. Glad you've found that requirement!

[gCardinal]

Service workers require the page to be secure (HTTPS) or the browser will refuse to register the service worker (even if msw logs that the service worker is registered).

Using HTTPS on local (via mkcert and a nginx reverse proxy) solve the issue for me.