One of the first items to not miss or be confused about when starting a typescript project is to set up the
tsconfig.json to contain how to resolve the paths for inclusion in the app being built.
In my case, being reminded to use the
node resolution strategy for importing from the
node_modules folder was a requirement.
It’s possible that Typescript < 1.8 is in use, and in that case, consider updating as these options are not available (https://github.com/Microsoft/TypeScript/issues/247).
Also see some further examples here.