Add link type "manifest" to HTML

[Malvoz]

I'm aware that the link relation was registered almost 5 years ago. However it does not yet show in https://www.iana.org/assignments/link-relations/link-relations.xhtml

I'm asking because whatwg/html#4823 (comment). I don't know if there's anything to be done TBH, asking nonetheless.

Thanks :)

[marcoscaceres]

I think we need to actually email IANA with the details from the spec. We haven't done that yet 😊

[marcoscaceres]

We need to do two things here... send a PR to the HTML spec to add "Link type "manifest"" and send a PR to: https://github.com/link-relations/registry

[aarongustafson]

Would you like me to do that @marcoscaceres?

[marcoscaceres]

That would be amazing. Take a look at Link type “preload” as one to base off. We should end up with something similar in HTML (pointing back to our spec).

[aarongustafson]

ToDo: Add to the HTML spec
ToDo: Web Platform Test:

x = document.createElement("link");
x.relList.supports("manifest")
;

[aarongustafson]

Related: whatwg/html#5581

[aarongustafson]

We need to fire an event named load on the link

Otherwise, fire an event named error at el.

[marcoscaceres]

Actually, I remembered that we decided not to fire the event on load because it reveals if/when the user is installing. It was something that came up a few years ago, so decided not to add it... I'll have to dig up the original conversation.

[aarongustafson]

PR is validating. Hopefully it’s ready to merge.

[aarongustafson]

Looks like we are almost ready to merge into HTML, but @annevk would like some additional tests. See whatwg/html#5581 (review)

[aarongustafson]

Looks like the PR is passing. 🤞🏻 we’ll get it merged soon.

[aarongustafson]

Awaiting completion of WPTs (#666).