In VS2017 I have a quick hello world node.js project. The installed template for node.js includes the use of NPM using the included package.json . I am editing a package.json file to include new dependencies. When saving package.json VS should install any new packages that are included.
I started with the project template: Other languages ββ\ TypeScript \ Node.js 
I confirmed that the option is enabled to restore npm packages while saving package.json

But no matter what changes I made to package.json VS, npm will not start and install the missing packages. Also, if I build or run VS, it will not automatically install the missing packages. I can right click on npm and select Install Missing Packages, which works.
What am I missing?

npm visual-studio-2017
Bruce c
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