First, clone the project

git clone https://github.com/priyaraj7/React-express-starter-code.git

move inside the directory

cd React-express-starter-code

next move into the server and install dependencies and start the server

cd server
npm install
node index.js

Open another terminal then cd into the client, install dependencies and start the server

cd client
npm install
npm start

Navigate to http://localhost:3000/ and click on button. You will get the response from the backend

If you would like to run the backend Express server and the react server at the same time use the following command in server side terminal:

# Run the client & server with concurrently
npm run dev

Note: Server runs on http://localhost:5000 and client on http://localhost:3000

If you get error like this use this command

sudo kill -9 $(sudo lsof -t -i:<port number>)