Adding service workers to specs

[domenic]

Specs to add service worker to:

Special:

• HTML

Easy:

• Infra
• DOM
• Fullscreen
• Notifications
• Fetch
• MIME Sniffing
• XMLHttpRequest
• Storage
• Quirks Mode

Need to start using the deploy script first (#11):

• URL
• Encoding
• Compatibility
• Console
• Streams (has one, but it's a one-off created for streams)

The best path here might be to fix #11, then add the service worker registration to the Bikeshed template, instead of doing individual PRs like whatwg/dom#476

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Original post follows:

I did this for streams with some success in whatwg/streams#637. Some thoughts:

• Maybe we should work to implement the more complicated strategy discussed at Meta: add a service worker to the spec streams#637 (comment) before rolling this out everywhere?
• Is there any way to deduplicate the code? Given that it has to be hosted on the same origin, it seems unlikely. Hmm, I guess importScripts works cross-origin? So then we'd just reduce the actual in-spec code to something like self.toCache = ... or maybe we could even get rid of that by inferring the logo filename from the origin.

[jakearchibald]

Brain fart: The cache could be built dynamically.

Eg, the cache name could be spec- plus the html url, plus the etag/last-modified of the html responses. Resources fetched from that page (images & js) would be added to a cache of the same name.

Once a new version of the spec is discovered, the old cache is deleted.

It's not as atomic as handling everything in install/activate events but it could work for simple pages like specs.

[domenic]

This was deployed successfully for whatwg/dom in whatwg/dom#476.

I'll update the OP with a checklist. Note that resources apart from the default set won't be cacheable without more deploy script work in the vein of #11.

[domenic]

This was done for everything but HTML as part of #23. (As noted there, Encoding is currently blocked; see whatwg/encoding#132.)

We'll leave this open to track HTML though.

[annevk]

Now that Encoding is done, maybe this should move to html-build or html directly?

[annevk]

whatwg/html-build#238