React Course

Build modern, dynamic user interfaces with React. Learn component-based architecture and master the most popular JavaScript library for front-end development.

Learn React from the ground up — components, props, state, hooks and building interactive UIs — with practical beginner-friendly lessons.

Ready to build real apps? Start with React.

Start with Lesson 1 — Introduction to React. We recommend finishing the JavaScript course first for the best experience.

Continue where you left off

Lessons in this course

• Introduction to React — What React is, how the component model works, and setting up your first app
• JSX In Depth — How JSX compiles to React.createElement — expressions, attributes, and the rules
• Components and Props — Build reusable UI pieces and pass data between them using props
• State and Lifecycle — Make components dynamic by tracking changing data with state
• Props & One-Way Data Flow — Pass, destructure, and default props; children; and why data flows one way
• Fragments & Multiple Elements — Return several elements without wrapper-div soup using <></> and keyed fragments
• Handling Events — Respond to clicks, key presses, and other user interactions in React
• Conditional Rendering — Show and hide UI with &&, ternaries, and early returns
• Lists & Keys — Render arrays with .map() and why every item needs a stable key
• Hooks (useState, useEffect) — Master the two most important React hooks for state and side effects
• useState in Depth — Async, batched state updates — the functional updater and avoiding stale state
• How React Rendering Works — Render vs commit, the Virtual DOM, reconciliation, and what triggers a re-render
• Immutable State Updates — Update arrays and objects without mutation so React actually re-renders
• Styling in React — className vs inline styles, CSS Modules, and conditional classes
• useEffect & the Dependency Array — Side effects, the dependency array, cleanup, and fixing infinite loops
• Data Fetching with useEffect — Fetch data the right way — with loading and error states
• Strict Mode & Double-Render — Why React intentionally double-invokes in dev and how to write effects that survive it
• useLayoutEffect vs useEffect — Measure layout and avoid flicker by running before the browser paints
• Checkpoint: React Fundamentals — Combine JSX, props, rendering and immutable state in a build — then a quiz
• useRef — DOM Refs & Persisting Values — Reference DOM nodes and persist values without causing re-renders
• useContext & the Context API — Share global state and avoid prop-drilling with the Context API
• useReducer — Manage complex state with actions and a reducer
• Custom Hooks — Extract and reuse stateful logic in your own hooks
• useMemo & useCallback — Memoize values and functions for referential stability
• React.memo & Avoiding Re-renders — Skip unnecessary re-renders by memoizing components
• Lifting State Up — Share state between components by moving it to a common parent
• Forms and Controlled Components — Build forms that React controls — inputs, selects, and validation
• Controlled vs Uncontrolled Components — The two ways React handles form inputs — and when to use each
• Lazy Loading & Suspense — Code-split your app with React.lazy and Suspense
• Error Boundaries — Catch render errors and show a fallback UI
• React Router — Add multiple pages and navigation to your React app with React Router
• TypeScript with React — Type your props, state, events, and hooks with TypeScript
• Component Composition & children — Build flexible components with the children prop and composition over configuration
• Portals — Modals & Tooltips — Render outside the parent DOM tree for modals, tooltips, and overlays
• Checkpoint: Build with Hooks — Review & combine useState, useEffect, useRef, useReducer and Context — then a quiz
• Data Fetching with TanStack Query — The modern data layer — queries, caching, and mutations
• React Router: Params, Nested Routes & Loaders — URL params with useParams, nested routes, Outlet, and data loaders
• Forms with React Hook Form + Zod — The current standard for performant forms with schema validation
• Global State with Redux Toolkit — Store, slices, and async thunks the modern Redux way
• Lightweight State with Zustand — Simple, fast global state without the boilerplate
• Checkpoint: A Mini App — Combine state management + data fetching into a real build — then a quiz
• Testing with React Testing Library + Vitest — Write tests that resemble how users actually use your components
• Styling React with Tailwind CSS — The dominant styling approach for modern React apps
• Next.js & the App Router — The leading React framework — file-based routing and server rendering
• React Server Components & Server Actions — The React 19 shift — less JavaScript, direct data access, and form actions
• React 19 Hooks: use(), useActionState & useOptimistic — The newest React primitives for promises, form state, and optimistic UI
• useId for Stable Unique IDs — Generate SSR-safe IDs for accessible label/input and aria pairings
• useTransition & Responsive UI — Mark non-urgent updates so the UI stays responsive during heavy renders
• useDeferredValue — Let expensive children lag behind a fast input for smooth typing and search
• useSyncExternalStore — Subscribe safely to external stores and browser APIs without tearing
• forwardRef & useImperativeHandle — Pass refs to children and expose an imperative API like focus() or scrollTo()
• Compound Components Pattern — Share implicit state via context for flexible APIs like <Tabs><Tab/></Tabs>
• Render Props Pattern — Share logic with a function-as-child prop — and when custom hooks replace it
• Higher-Order Components (HOCs) — Wrap a component to add behavior — withAuth, withLogging, and prop forwarding
• Checkpoint: Patterns & Modern Hooks — Build a reusable pattern with modern hooks — then a quiz
• Building a Complete React App — Put everything together in a full project with real-world patterns
• useFormStatus & Form State — Read a parent form's pending state from a child with the React 19 useFormStatus hook
• Accessibility in React — Semantic HTML, ARIA, keyboard navigation and focus management for inclusive SPAs
• Animations with Framer Motion — Declarative animations, variants, AnimatePresence and gestures with Framer Motion

Frequently asked questions

Do I need to know JavaScript before learning React?

Yes — React is a JavaScript library, so you should be comfortable with functions, arrays, objects, the map method and ES6 features like arrow functions and destructuring before starting. This course builds on those foundations.

Is React hard to learn?

React has a learning curve around concepts like components, props, state and hooks, but it is very logical once it clicks. If your JavaScript is solid, most learners feel comfortable building React apps within 1–2 months.

Is React still the best framework to learn in 2026?

React remains the most widely used front-end library with the largest job market and ecosystem. Learning it gives you the most opportunities, and the concepts transfer to alternatives like Vue and Svelte.

More for this course

• React cheat sheet — Quick syntax reference you can scan while you code
• Understanding JavaScript Closures — Master one of JavaScript's most powerful and misunderstood features with practical examples.