"This is the Monaco editor component from Erich Gamma's group out of Zurich. It was originally written in JavaScript but gradually rewritten in TypeScript. When Anders speaks about teams within Microsoft building large TypeScript systems, this is one he is talking about" as one comment mentioned on a related article "It's also used in VisualStudio and IE11's new F12 tools.":
http://www.hanselman.com/blog/ARichNewJavaScriptCodeEditorSp...
"Code uses a newer, faster version of the same industrial-strength HTML-based editor that has powered the “Monaco” cloud editor, Internet Explorer's F12 Tools, and other projects.": https://code.visualstudio.com/Docs
Look at the VSCode-linux-x64.zip in dir "\resources\app\server\" there is a "monaco.impl.js". It's the "monaco" editor component that comes from Switzerland that is also used in Visual Studio Online.
"This is the Monaco editor component from Erich Gamma's group out of Zurich. It was originally written in JavaScript but gradually rewritten in TypeScript. When Anders speaks about teams within Microsoft building large TypeScript systems, this is one he is talking about" as one comment mentioned on a related article "It's also used in VisualStudio and IE11's new F12 tools.": http://www.hanselman.com/blog/ARichNewJavaScriptCodeEditorSp...
"Code uses a newer, faster version of the same industrial-strength HTML-based editor that has powered the “Monaco” cloud editor, Internet Explorer's F12 Tools, and other projects.": https://code.visualstudio.com/Docs