It makes sense for Microsoft to add a built-in JavaScript debugger in VS Code for developers building apps in it or in Microsoft's own superset of the language, TypeScript.

That built-in experience comes via vscode-js-debug, a GitHub project described as a Debugger Adapter Protocol -based JavaScript debugger that works with Node.js, Chrome, Edge, WebView2 and VS Code ...

Built-in JavaScript objects and functions are ones you'll use all the time. Here's how to use Object, JSON, String, Math, Date, and console in your JavaScript programs.