Add inset-area() function BCD

[chrisdavidmills]

Summary

CSS Anchor Positioning is set to be released in Chrome 125 (see the associated Chrome Status entry).

We added most of the BCD in a different PR, but we missed the inset-area() function, which is a possible value for the position-try-options property. This PR adds that

Test results and supporting details

Related issues

[Elchi3]

If I look at https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function/translate3d then we have a sub page on MDN and the compat data lives under css.types.transform-function.translate3d.

Would you model inset-area() after this pattern? like:

• https://developer.mozilla.org/en-US/docs/Web/CSS/position-try-options/inset-area
• css.types.position-try-options.inset-area

Or maybe I'm missing something. CSS docs and its structure is not quite my usual avenue. :)

[chrisdavidmills]

If I look at https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function/translate3d then we have a sub page on MDN and the compat data lives under css.types.transform-function.translate3d.

Would you model inset-area() after this pattern? like:

* https://developer.mozilla.org/en-US/docs/Web/CSS/position-try-options/inset-area

* css.types.position-try-options.inset-area

Or maybe I'm missing something. CSS docs and its structure is not quite my usual avenue. :)

@Elchi3 ah, this is a good point. I arrived at doing it this way because I saw the https://developer.mozilla.org/en-US/docs/Web/CSS/fit-content_function page, decided to follow that pattern for the inset-area() function page slug, and then thought that it would also have its own separate BCD entry.

But I've now seen that fit-content() has its entry at css.properties.width.fit-content_function. I'll update this to follow that pattern too, and put it under css.types.position-try-options.inset-area. An advantage is that you'll also get that entry appearing under the position-try-options page BCD, which will be useful.

[Elchi3]

Thanks Chris, I like this a lot better.