Today, not all required type definitions for javascript libraries are available through Nuget. One can use "tsd" to install typescript definition "d.ts" files, which requires Node.js to be available on the development machine. How to use tsd: - Install Node.js (make sure node gets added to the PATH variable). - Run the following npm command: npm install tsd - Open the command prompt - switch to the typings folder within the asp-net project - Use tsd; for instance: tsd install react-global