Final answer:
useReducer is better suited than useState in complex state scenarios within a React component, such as when managing multiple sub-values or when state updates depend on one another.
Step-by-step explanation:
You might choose to use useReducer over useState in a React component for several reasons. One main reason is when you have complex state logic that involves multiple sub-values or when the next state depends on the previous one. useReducer is also preferable when you are dealing with multiple states that need to be updated in response to an action, as it makes state updates more predictable and maintainable by providing a clear structure of how state is handled.
For example, in a shopping cart component, where you might have to handle adding items, removing items, and applying discounts, a reducer can manage all these actions more cleanly than multiple useState hooks. Additionally, useReducer works well with the context API for managing global states as it allows better state management patterns and can make debugging easier with a clear action history.