Understanding and Using the useReducer Hook in React
React’s useReducer hook, introduced in version 16.8, lets a component manage complex state by supplying a reducer function and an initial value, returning [state, dispatch] where dispatch triggers actions; it supports lazy initialization, centralizes updates, works with useContext for shared state, and is preferable to useState for non‑trivial logic but less suited than full Redux for large‑scale state needs.
