[css-typed-om-1] Exposed value for partial interface Element makes no sense and is not valid Web IDL

[bzbarsky]

https://drafts.css-houdini.org/css-typed-om-1/#computed-stylepropertymapreadonly-objects says:

[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
partial interface Element

This is nonsensical (because Element is only exposed in Window), and it's invalid Web IDL, because it's nonsensical. Specifically, https://heycam.github.io/webidl/#Exposed says:

If [Exposed] appears on a partial interface or partial namespace, then the partial’s own exposure set must be a subset of the exposure set of the partial’s original interface or namespace.

Does Blink's IDL parser not even pretend to implement this stuff? :(

[bzbarsky]

The partial interface CSSStyleRule and partial interface ElementCSSInlineStyle Exposed values have the same issue.

[tabatkins]

Ah, I spammed the [Exposed] a little too aggressively. Removed from all three of the partial interfaces.

[bzbarsky]

Does Blink's IDL parser not even pretend to implement this stuff? :(

Ah, the IDL in the blink tree just looked nothing like what's in the spec. Awesome.

[bzbarsky]

Probably need to update the web platform tests too. And maybe we need an idlharness bug if it parsed this. :(

[tabatkins]

Ah, the IDL in the blink tree just looked nothing like what's in the spec. Awesome.

That's because it was a very recent change, from the end of January.