# in the myBootstrap3 directory
$ npm link
# back to project root folder
$ cd ../path-to-project
$ npm link myBootstrap3
# previously
# import 'bootstrap-sass/dist/css/bootstrap.css'
# using this package:
import 'myBootstrap3'
# In project package.json
"scripts": {
"start-js": "react-scripts start",
"start": "npm-run-all -p start-js start:myBootstrap3",
"start:myBootstrap3": "(cd node_modules/myBootstrap3 && npm start)",
...