Free online courseWorking

Course Description

Turn JavaScript into a tool for building real, data-driven web experiences. In this free online course, you’ll learn how to request, transform, and present information from files, public services, and your own server so your projects feel alive and interactive instead of static. You’ll practice the essential workflow of modern web development: loading data, handling asynchronous responses, and using that data to power visual interfaces users can understand at a glance.

You’ll start by working in the browser with the Fetch API, getting comfortable retrieving different kinds of resources and converting responses into formats JavaScript can use. From there, you’ll move beyond console logs and make data meaningful through visuals—creating graphs with Chart.js and building maps with Leaflet to place information in a real-world context. You’ll also learn how to refresh results automatically on a schedule so your pages can update without constant manual reloads, a key technique for live dashboards and trackers.

As the course progresses, you’ll step into server-side development with Node.js and Express to understand why the back end matters even for JavaScript-first apps. You’ll handle POST requests, accept JSON safely, and store information so it persists. Using a database, you’ll be able to save and query entries, then send them back to the browser to display in a useful interface, including mapping records for an engaging user experience.

Practical details are treated like first-class skills: working from the terminal, combining responses from multiple APIs, and protecting sensitive credentials using environment variables. You’ll also see what it takes to bring a project online with deployment workflows, giving you a clearer path from learning code to publishing a functioning web application. By the end, you’ll have a stronger foundation in APIs, client–server architecture, and the habits that make web projects reliable, secure, and ready to share.