Please correct me if I am wrong, here's my understanding.
"npm install installs both dependencies and dev-dependencies unless NODE_ENV is set to production."
So, these ~100 [direct] dev dependencies are installed by anyone who does `npm install react`, right?
They are only installed for the topmost package (the one you are working on), npm does not recurse through all your dependencies and install their devDependencies.
When you do `npm install react` the direct dependency is `react`. All of react's dependencies are indirect.
