Most of you will be familiar with Node.js by now—it is essentially JavaScript on the server side. It is an open source project that, at least for now, uses Chrome's V8 JavaScript engine to run JavaScript out of the context of a browser. It has become extremely popular, arguably due to its use of the JavaScript language (some may not agree), but essentially because of its speed and the huge amount of libraries made available through npm—currently, more than 550,000.
You can find more information about Node.js and npm on their respective sites, https://nodejs.org and https://www.npmjs.com, and about the Visual Studio support for npm here: https://docs.microsoft.com/en-us/visualstudio/javascript/npm-package-management
You can install the Node.js support for Visual Studio through the VS installer tool, but you will also need to have Node.js itself installed, which you can get from https://nodejs.org. You get Visual Studio templates...