[DOM] move `flushSync` out of the reconciler#28500

Merged

gnoff merged 1 commit intofacebook:mainfrom gnoff:flushsync

Apr 8, 2024

+248-84

Commits on Apr 8, 2024

Implements flushSync in react-dom without relying on the reconciler. This will only be available in builds that no longer support legacy mode because the reconciler flushSync has special logic for …
gnoff
committed