This code could be help you to have a express server 4 which work like a charm with React-Router-Dom, with direct access from Browser. Your url like intra.comet.app/about or intra.comet.app/user/MyLove, go directly to the good react dom component or function

Versions use:

• Express JS: ~4.16.1
• React : ^17.0.2
• React Dom Router : ^5.2.0

We integrate a

• Express Server create with Express application generator :

    express --no-view {yourProject}
  

after we install react apps ,

• create a reactApp

    yarn create react-app client
  

• in "client" folder add react-dom-router

    cd client
  
    yarn add react-router-dom
  

• add Fluent ui Northstar library

    yarn add @fluentui/react-northstar
  

1. in /app.js (Express app) add this lines

   app.use('/*', express.static(path.join(__dirname, 'client/build/index.html')))

   just before at the end of /app.js

   module.exports = app;

2. Prepare your React router

3. Build your client app with

   yarn build in client path

4. Enjoy :)