This course picks up where CS50x leaves off, diving more deeply into the design and implementation of web apps with Python, JavaScript, and SQL using frameworks like Django, React, and Bootstrap.

The course then transitions to Python, a higher-level language that you’ll understand all the more because of C. Toward term’s end, the course introduces SQL, via which you can store data in …

This is CS50x 2026. 🎉 Curious how your 2025 work counts toward the 2026 course? See our FAQsif you started in 2025 or earlier. Interested in a verified certificate, a professional certificate, or transfer …

JavaScript. Events. DOM Manipulation. Local Storage. APIs. Watch lecture. Audio Notes Slides Keynote PDF Source Code Subtitles Transcript Video CS50 Video...

Week 0 HTML and CSS HTML. Document Object Model. Forms. CSS. Selectors. Responsive Design. Bootstrap. Sass.

Feb 4, 2026 · CS50 Web: Web Programming with Python and JavaScript. Your college or university, present or future, may accept our courses that are included in the ACE National Guide and for which …

Lecture 1 Introduction Git GitHub Commits Merge Conflicts Branching More GitHub Features Introduction Welcome back to lecture 1! In lecture 0, we introduced HTML, CSS, and Sass as tools …

The course introduces students to modern JavaScript (including ES6 and ES7) as well as to JSX, a JavaScript extension. Through hands-on projects, students gain experience with React and its …

This is CS50x 2025, an older version of the course. See cs50.harvard.edu/x/2026for the latest! This is CS50 CS50’s Introduction to Computer Science OpenCourseWare

Week 8 HTML, CSS, JavaScript Internet: Routers; TCP/IP; DNS. HTTP: URLs, GET, POST. HTML: Tags; Attributes. Servers. CSS: Properties; Selectors. Frameworks. JavaScript: Variables; …