React Hooks Deep Dive

A comprehensive guide to using React hooks effectively, with practical examples and performance considerations.

useState

Manages state in functional components. Returns a stateful value and a function to update it.

useEffect

Handles side effects, such as data fetching, subscriptions, or manually changing the DOM.

useReducer

An alternative to useState for managing complex state logic. Useful for state with multiple sub-values or when the next state depends on the previous one.

useContext

Accesses context to share data across the component tree without prop drilling.

useCallback

Returns a memoized callback function. Useful for preventing unnecessary re-renders of child components that rely on callback functions.

useMemo

Returns a memoized value. Useful for optimizing expensive calculations by caching the result between renders.

Custom Hooks

Encapsulates reusable logic into a function. Custom hooks let you extract component logic into reusable functions.

useRef

Returns a mutable ref object whose .current property is initialized to the passed argument (initialValue). It can be used to access a DOM element directly.