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 ...

The extension 'makes it easy to code, build, deploy, and debug your IoT Edge solutions in Visual Studio 2022, by providing a rich set of functionalities.' ...

In VS Code 1.66, the JavaScript debugger now supports collecting and visualizing heap profiles, so developers can see where and how much memory is being allocated over time.