This screencast shows how to develop a simple API with Spring WebFlux. It also shows how to build a React app that communicates with it via HTTP and WebSockets. Finally, it locks it down with Spring Security and Okta's React SDK.
How to Pass More Than One Parameter in React
Do you know Angular and want to learn React?
Ionic + React Programming by Building a Modal
☞ Spring Boot Websocket Chat Application Example
☞ Spring Boot Tutorial for Beginners (Java Framework)
☞ Getting Closure on React Hooks
☞ React + TypeScript : Why and How
☞ React Tutorial - Learn React - React Crash Course 
☞ Learn React - Full Course for Beginners - React Tutorial 2019