Advanced Hooks, Referential Equality, and Stores

Senior frontend engineers must make informed architectural decisions regarding referential equality and subscription management. Interviewers frequently probe candidate knowledge of over-optimization trade-offs in useMemo and useCallback.

Explore how useSyncExternalStore prevents concurrent tearing when reading non-React browser APIs, how to expose clean imperative APIs with useImperativeHandle, and how useLayoutEffect prevents layout flickers by mutating the DOM synchronously before browser paint.