MDN Web Docs
The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.
Overview
Added
March 17, 2026
Subject & domain
computer-science-fundamentals · software-engineering
Grade range
Grade 9 (Freshman)–Grade 12 (Senior)
Page kind
Article
Introduction
MDN Web Docs: Key Updates and Technical Highlights
- MDN 20th Anniversary: Celebrating two decades of the platform as a trusted resource for web developers.
- Navigation API: A modern successor to the History API and
window.location, specifically designed to manage navigation and history in single-page applications (SPAs). - Trusted Types API: A security feature that forces input through transformation functions (typically sanitization) to prevent client-side cross-site scripting (XSS) attacks.
- CSS Anchor Positioning: A new module allowing developers to tether elements together, enabling dynamic sizing and positioning of elements relative to a defined "anchor."
- MDN Platform Rebuild: The site has undergone a frontend overhaul, focusing on architectural improvements and a smoother navigation experience.
- Web Performance & Design:
- Image Compression: An exploration of the trade-offs between quality, file size, and processing speed using various codecs and metrics.
- View Transitions: A guide on implementing smooth, animated transitions between pages in multi-page applications using minimal CSS.
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