The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.

Guidance to build modern web experiences that work in every browser.

V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++.

A free guide to all HTML elements and attributes.

CSS Reference is a free visual guide to CSS. It features the most popular properties, and explains them with illustrated and animated examples.

JavaScript.com is a resource for the JavaScript community. You will find resources and examples for JavaScript beginners as well as support for JavaScript experts. Learn JavaScript or free with our easy to use input output machine.

Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.

Smashing Magazine — front-end, UX and design for front-end engineers and designers

Learn to Code — For Free

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Udemy is an online learning and teaching marketplace with over 250,000 courses and 80 million students. Learn programming, marketing, data science and more.