$ npm init
$ npm install parcel-bundler --save-dev
add this script to package.json "dev": "parcel index.html", "build": "parcel build index.html"
$ npm install @reach/router
$ npm run dev
$ npm init
$ npm install parcel-bundler --save-dev
add this script to package.json "dev": "parcel index.html", "build": "parcel build index.html"
$ npm install @reach/router
$ npm run dev