Advanced React

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What You'll Learn

Theory

As React applications grow, advanced patterns help manage complexity, share logic, and build scalable architectures.

Hooks

Hooks let you use state and side effects in functional components. The most common are useState, useEffect, useContext, and useReducer. Custom hooks let you extract and reuse stateful logic across components.

Forms

React forms use controlled components where form state lives in component state. Each input's value is controlled by state, and changes are handled via onChange handlers. Libraries like React Hook Form simplify validation.

Routing

React Router enables client-side routing in SPAs. Use <BrowserRouter>, <Routes>, <Route>, and <Link> to create multi-page experiences without full page reloads.

Component Composition

Composition — combining simple components to build complex ones — is more idiomatic in React than inheritance. Use children prop, render props, and component slots for flexible composition.

Why this matters

Advanced React patterns like hooks, custom hooks, and composition are essential for building real-world applications at scale. These patterns let you share logic, manage side effects, and create flexible component architectures.

What's next

In the next lessons, you'll dive deeper into each topic with hands-on examples and exercises.

Practical Examples

Example: Custom Hook and Composition

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Exercises

Create a useToggle Custom Hook

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Create a custom hook called useToggle that returns a boolean state and a toggle function. Use it in a component that toggles a message visibility on and off.

Expected Output:

A button that toggles a message visibility