Goal of Create ESRI React App is to connect ESRI and React application with minimal effort by using create-react-app to create react application and esri-loader to add the ArcGIS JS API to React app. A prerequisite for this application is Create React App already installed in your development environment. If Create React App is not installed on your system run:

npm install create-react-app -g

To install Create ESRI React App application run:

$ npm install create-esri-react-app -g
- or -
$ yarn global add create-esri-react-app

To create ESRI React application run:

$ create-esri-react-app esri_app

It will create a directory called esri_app inside the current folder.
Inside that directory, it will generate the initial project structure and install the transitive dependencies:

esri_app
├── README.md
├── node_modules
├── package.json
├── .gitignore
├── public
│ └── favicon.ico
│ └── index.html
│ └── manifest.json
└── src
 └── App.css
 └── App.js
 └── App.test.js
 └── index.css
 └── index.js
 └── logo.svg
 └── registerServiceWorker.js

You can specify version of ESRI ArcGIS JS api during creation process. If you don't specify ESRI ArcGIS JS api version default version will be v4.

$ create-esri-react-app esri_app_v4
- or -
$ create-esri-react-app esri_app_v3 -a 3

Create React apps with no build configuration.

• Getting Started – How to create a new app.
• User Guide – How to develop apps bootstrapped with Create React App.

Create React App works on macOS, Windows, and Linux.
If something doesn’t work please file an issue.