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W3C Markup Validation Service. Tag certifying that a website has been checked for well-formed XHTML (above) and CSS (below) markup. The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition.
CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets. It functions as an online code editor and open-source learning environment, where developers can create code snippets, called "pens," and test them. It was founded in 2012 by full-stack developers Alex Vazquez and Tim Sabat and front ...
Website. www .htmlvalidator .com. CSS HTML Validator (previously named CSE HTML Validator) is an HTML editor and CSS editor for Windows (and Linux when used with Wine) that helps web developers create syntactically correct and accessible HTML / HTML5, XHTML, and CSS documents by locating errors, potential problems like browser compatibility ...
Note that a video file normally contains both video and audio content, each encoded in its own format. The browser has to support both the video and audio formats. See HTML audio for a table of which audio formats are supported by each browser. The video format can be specified by MIME type in HTML (see example ).
Wikipedia:HTML 5 – information page on technical details of updating WP code to HTML 5 + CSS3, including how to replace deprecated HTML 4.01 markup; includes automated searches for obsolete markup Wikipedia:Linter – MediaWiki extension to identify broken and problematic markup which cannot be fixed automatically by the server
The European Union opened fresh investigations Thursday into Facebook and Instagram over suspicions that they're failing to protect children online, in violation of the bloc's strict digital ...
The European Union is investigating Facebook and Instagram over whether they are so addictive that they are having "negative effects" on the "physical and mental health" of children.
Replit allows for the pulling of code from a GitHub repository and linking Repls to GitHub repositories. Some Repls also have debugger and unit testing support. Replit uses the Debugger Adapter Protocol to provide debugging services in Java , Python , Node.js , and C++ for all users connected to a Repl. [24] Replit has zero-setup unit testing ...