How does useMemo differ from useCallback?

Both useMemo and useCallback are used for memoization in React, but they serve different purposes:

  • useMemo memoizes the result of a function, meaning it stores the result of a computation.
  • useCallback memoizes a function itself, ensuring that a function reference is stable and does not change unless its dependencies change.


Can we use useMemo and useCallback interchangeably?

Sometimes, when you replace useMemo by useCallback or vice versa, the application still works. But they should not be used interchangeably because they serve different purposes.