React Hooks

11 examples to get you started with React Hooks -- 7 basic and 4 intermediate.

Extract reusable stateful logic into functions that start with use — React's primary code reuse mechanism.

Synchronize a component with an external system by running side effects after render.

Manage local component state with React's most fundamental hook.

Read and subscribe to context from any component without prop drilling.

Manage complex state transitions with a reducer function and dispatched actions.

Cache the result of an expensive computation between renders.

Cache a function definition between renders to maintain a stable reference.

Hold a mutable value that persists across renders without causing re-renders.

Generate a unique, stable ID for accessibility attributes that is consistent between server and client.

Mark state updates as non-urgent so they don't block user input.

Defer updating a part of the UI to keep the rest responsive during expensive renders.

Manage form state driven by an action function, with built-in pending state and progressive enhancement.

Show an optimistic (predicted) state while an async action is in progress, then reconcile when it completes.

Read the value of a promise or context during render — React 19's new primitive for async data and conditional context.

A condensed summary of the 25 most important best practices drawn from every page in this section.