ServiceWorkerRegistration.active and friends return null

[jespertheend]

Changes proposed in this pull request:

The installing, waiting and active getters on a ServiceWorkerRegistration return null now. I reckon this is outdated.

• ServiceWorkerRegistration.active on mdn
• ServiceWorkerRegistration interface spec

[malchata]

Once a service worker is installed, those values should be null, because the service worker has been activated after the next page refresh. Try the following in the console to check if a service worker is activated post-install:

const reg = await navigator.serviceWorker.getRegistration("/js/sw.js");
console.log(reg.active.state);

Also beware that if a service worker is not located at the root, its scope will be restricted to whatever folder it's in. You can specify a Service-Worker-Allowed header to get around this.

cc: @jakearchibald

[malchata]

Ah, I see what you were referring to here.

I think this change makes sense, but didn't fully understand where you were coming from at first. Still, it'd be a good idea if @jakearchibald took a look at this, since this is a guide he wrote.

[jespertheend]

Ah sorry my bad, I should have been more clear there.

So just to be clear: I think an older version of the spec said that these values would be undefined when non existent, but I think this changed at some point, because I'm observing that they are null now and the spec and mdn also state that they are initially null.