New Vision support with GitHub Copilot in the latest Visual Studio Code Insiders build takes a user-supplied mockup image and creates a web page from it in seconds, handling all the HTML and CSS.

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

GitHub declined to comment on the decision to remove the code, but posted Twitter’s takedown request on its website. The leak comes as Mr. Musk has promised to make some of Twitter’s code public.