Building AI-Powered Web Applications with React and Next.js

This course teaches you React from the ground up — starting with the core concepts and building up to a real working application. You will learn how to create components, manage state, handle forms, validate data, and connect your app to a REST API. Every topic is covered with clear explanations and hands-on practice exercises. The course also covers the most common mistakes developers make in React — in JSX, state management with useState, and side effects with useEffect. Knowing these mistakes early will save you hours of debugging and help you build better apps from the start. Throughout the course, you'll explore: React Fundamentals: Set up your development environment, create your first React application, and understand how the project structure works. Creating Components: Build your first React component, write markup with JSX, use variables inside JSX, and learn how to import and export components properly. Adding Interactivity: Pass props between components, respond to events, render lists, use Fragment, and apply conditional rendering to show or hide content. Styling in React: Apply styles using inline styles, CSS files, CSS Modules, and global stylesheets — and explore alternative styling options. Managing State: Understand the component lifecycle, use the useState hook, and handle batch state updates for predictable UI behavior. Managing Complex State: Update objects and arrays in state correctly without mutating them directly. Building a To-Do List App: Build a full To-Do List application step by step — create a form, display and style the list, add edit and delete functionality, and implement filtering by status. Validating Form Data: Add form validation using React Hook Form and Yup — display error messages and create custom validation rules. Working with REST APIs: Fetch, create, update, and delete data via API calls using fetch and useEffect, integrate Axios, and handle errors with try/catch and async/await. Advanced API Techniques: Organize API logic in separate files, build a custom React hook for API calls, display error banners, and show spinners during loading. Common React Mistakes: Learn and fix the most frequent mistakes developers make in JSX syntax, useState hook usage, and useEffect hook behavior.