The CSSWG resolved to rename this property, because "fallbacks" more accurately describes what this property controls. The word "options" is a bit deceiving, since the styles outside of `position-try` blocks will be tested first, and if they result in a layout that fits within the containing block, none of the "options" will get used. So "fallbacks" is a better word to describe this behavior. https://github.com/w3c/csswg-drafts/issues/10395#issuecomment-2192127524 One note for developers: there is a `position-try` shorthand (see https://drafts.csswg.org/css-anchor-position-1/#position-try-prop) that can be used to help this migration. If you set `position-try` instead of `position-try-options` *or* `position-try-fallbacks`, the shorthand will set the proper longhand before and after this rename.
This is a CSSWG resolution, meaning the CSS spec has changed. We need to follow the standardized feature behavior and naming.