# useSyncExternalStore in Real Apps: Part 2
7 min read
Use React useSyncExternalStore with browser APIs, localStorage, selectors, SSR, and practical external state patterns.
Use React useSyncExternalStore with browser APIs, localStorage, selectors, SSR, and practical external state patterns.
Learn the basic useSyncExternalStore contract and what React roughly does internally when an external store changes.
Do you ever use TanStack Query and think, “Wow, this library is so cool & convenient, they really thought about every edge case and made it easy to use. I wish I could build something like this…