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W3Schools is a freemium educational website for learning coding online, launched in 1998 by Refsnes Data in Norway. It offers courses, tutorials, templates, and a live editor for various web technologies, such as HTML, CSS, JavaScript, Python, and more.
HTML is the standard markup language for web pages, defined by the W3C and ISO. Learn about its origins, elements, tags, attributes, versions and related technologies such as CSS, JavaScript and HTML5.
Learn about the tools and techniques used to create the graphical user interface of a website, such as HTML, CSS, JavaScript, and WebAssembly. Find out the goals and challenges of front-end development, such as accessibility, performance, and speedy development.
JavaScript is a programming language and core technology of the Web, influenced by Java and Scheme. Learn about its creation at Netscape, adoption by Microsoft, standardization by ECMA, and applications in browsers, servers, and apps.
HTML attributes are special words used inside the opening tag to control the element's behaviour. Learn about the types, functions, and examples of HTML attributes, such as id, class, style, title, and event attributes.
W3Schools - The world's largest Web Development learning site. Image credits: JackBurtongr #2. The Internet Archive should be regarded as one of the 7 wonders of the information age.
W3Schools [ae] Free Yes Yes Yes No No jQuery, tutorials WebFiddle [af] Free No Yes Yes No No JSFeed [ag] Free & Paid Yes Yes Yes Yes Yes HAML, Markdown, Jade, Less, Sass, Stylus, CoffeeScript, LiveScript, TypeScript, Babel LiveGap Editor [ah] Free Yes Yes Yes No No Less: ScratchPad [ai] Free Yes Yes No Yes No Runnable [aj] Free Yes Yes Yes No No
Learn about the W3C validator that checks HTML, XHTML, CSS and other web technologies for well-formed markup. Find out the history, limitations and browser accommodation of this service.