Updated in May 2025.

This course now features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. Unlock the full potential of JavaScript by mastering AJAX and JSON, the core technologies behind dynamic web content. This course begins with an introduction to AJAX and JSON, where you will gain a foundational understanding of how these technologies work in tandem to update web pages asynchronously. You’ll start by setting up your development environment, learning about JavaScript objects, and exploring how JSON structures data. With hands-on examples, you will transform your knowledge into practical skills, creating responsive web applications that engage users in real-time. As the course progresses, you will dive deeper into connecting your JavaScript code with external APIs. You'll learn to fetch, manipulate, and display data seamlessly from working with popular web APIs like RandomUser and GitHub to using JSON placeholder services. The focus will be applying AJAX to handle requests and responses effectively, ensuring your applications can communicate smoothly with servers. By engaging with real-world examples, you will develop the competence to integrate complex data sets into your web projects effortlessly. The course culminates with advanced coding examples that reinforce the concepts learned. Through practice, you’ll become proficient in using JavaScript array methods, the Fetch API, and DOM manipulation to enhance user interaction on your websites. Whether you're building a personal project or aiming to advance your career, this course equips you with the tools and knowledge to create interactive, data-driven web applications with confidence. This course is designed for web developers who have a basic understanding of HTML, CSS, and JavaScript. It is ideal for those looking to expand their skills in front-end development by learning how to implement AJAX and JSON for dynamic web content. No prior experience with APIs is required.