The CSSWG resolved to rename this property from `inset-area` to `position-area`. See the CSSWG discussion here: https://github.com/w3c/csswg-drafts/issues/10209#issuecomment-2221005001 Chrome disagrees with this change, but would like to ship an interoperable implementation. We will ship the new property name, `position-area`, as a synonym for `inset-area` first. Then after a suitable amount of time, we will remove `inset-area`. The latter removal will be done under a separate Intent.
The property needs to change because the CSSWG resolved to rename it.