React Fundamentals
React is how modern web apps are built. From a simple button to a full product — everything is a component. This course teaches React through real analogies, interactive patterns, and a complete project. Start with "what even is React?" and end by deploying your own app.
What you'll learn
Course outline
Free — no account needed
Full course — $79 one-time
Props — Passing Data Between Components
The mechanism that lets you build reusable, configurable components
useEffect — Running Code at the Right Time
Fetching data, subscribing to events, and cleaning up — all in the right moment
Lists and Conditional Rendering
Render arrays of data and show or hide UI based on conditions
Forms in React
Controlled inputs, form submission, and the React way of handling user input
useContext — Global State Without Prop Drilling
Share data across the component tree without passing props through every layer
Custom Hooks — Reusing Stateful Logic
Extract repeated hook patterns into reusable functions
Fetching Data
APIs, loading states, error handling, and the async patterns React apps use
React Router — Multiple Pages in One App
Client-side routing: navigate between pages without reloading the browser
Build a Complete React App
Put it all together: a working task tracker with persistence, filtering, and deploy
Get the full course
All 12 lessons — components, state, hooks, routing, data fetching, and a deployed app.
Written by the RadarTrek editorial team · Reviewed June 2026
About this course
React is the most widely used JavaScript library for building user interfaces, powering everything from small startups to products at Meta, Airbnb, and Netflix. Learning React means understanding the component model that underpins modern web development — building reusable pieces of UI, managing state, and connecting to APIs. This React tutorial for beginners takes you from your first component to a working single-page application, using the hooks-based patterns React developers use in production today.
React developers are among the most sought-after engineers globally in 2026, and React knowledge opens the door to the full modern stack — Next.js for server-side rendering, React Native for mobile, and a vast ecosystem of component libraries and tools. After this course you will be building real interfaces with useState, useEffect, and context — the hooks that cover the majority of everyday React development.
Frequently asked questions
Do I need to know JavaScript before learning React?
Yes — React is a JavaScript library, so solid JavaScript fundamentals are essential. You should be comfortable with functions, arrow functions, array methods (map, filter), destructuring, and async/await before starting. Jumping into React without JavaScript foundations is one of the most common reasons beginners struggle. Complete the JavaScript Fundamentals course first if you are not confident in those areas.
How long does it take to learn React?
Most developers with solid JavaScript knowledge become comfortable with React basics in 3–6 weeks of consistent practice. This course covers components, props, state, effects, and API integration in a structured sequence. Getting to a point where you can build and deploy a real React application takes 1–3 months. Getting to professional proficiency — state management, performance optimisation, testing — is a 6-month journey.
What can I build with React?
React is used to build interactive web applications of any complexity — dashboards, social feeds, e-commerce stores, SaaS products, content platforms, and more. Combined with Next.js it handles server-side rendering and static generation. Combined with Supabase or a REST API, you can build full-stack applications. React Native extends React skills to iOS and Android mobile app development.
Is React still the best choice in 2026?
React remains the dominant choice for production web applications in 2026, with the largest ecosystem, community, and job market of any front-end framework. Vue and Svelte have passionate followings, but React's ecosystem depth — Next.js, React Native, Remix, the component library landscape — and sheer market share make it the highest-ROI framework to learn for career purposes.
What is the difference between React and Next.js?
React is a UI library — it handles how components render and update in the browser. Next.js is a full-stack framework built on top of React that adds file-based routing, server-side rendering, static generation, API routes, and image optimisation. Most professional React applications are built with Next.js because it solves the production concerns — SEO, performance, routing — that plain React leaves to you.