How to run react and express concurently?

npm concurrently
create-react app
create-react-app = express
npm run-all
create-react app proxy
npm-run-all vs concurrently
express and react on same port

I am building an app that has frontend-React and backend express. I am trying to concurrently run both. I edited the pakage.json file in the back end. I have two folders in my main folder frontend and backend folders. When I tried to run this it gives an error. How do I fix this error? Thanks.

  "name": "backend",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "server": "nodemon index.js",
    "client": "cd frontend && npm start",
    "dev": "concurrently \"npm run server\" \"npm run client\""
  "author": "Ezana",
  "license": "ISC",
  "dependencies": {
    "concurrently": "^4.1.0",
    "express": "^4.16.4",
    "nodemon": "^1.18.10"

   [0] Error: listen EADDRINUSE: address already in use :::5000
[0]     at Server.setupListenHandle [as _listen2] (net.js:1277:14)
[0]     at listenInCluster (net.js:1325:12)
[0]     at Server.listen (net.js:1412:7)
[0]     at Function.listen (/Users/ezanatesfaye/Desktop/Canvas/backend/node_modules/express/lib/application.js:618:24)
[0]     at Object.<anonymous> (/Users/ezanatesfaye/Desktop/Canvas/backend/index.js:25:5)
[0]     at Module._compile (internal/modules/cjs/loader.js:689:30)
[0]     at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
[0]     at Module.load (internal/modules/cjs/loader.js:599:32)
[0]     at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
[0]     at Function.Module._load (internal/modules/cjs/loader.js:530:3)
[0] Emitted 'error' event at:
[0]     at emitErrorNT (net.js:1304:8)
[0]     at process._tickCallback (internal/process/next_tick.js:63:19)
[0]     at Function.Module.runMain (internal/modules/cjs/loader.js:745:11)
[0]     at startup (internal/bootstrap/node.js:283:19)
[0]     at bootstrapNodeJSCore (internal/bootstrap/node.js:743:3)

Kill the app that you are running in port 5000 or change the port of you node app. You can user the following configuration as well.

  "scripts": {
    "test": "jest",
    "start": "node index.js",
    "start-dev": "nodemon index.js",
    "client-install": "npm install --prefix client",
    "client": "npm start --prefix ../client",
    "dev": "concurrently \"npm run start-dev\" \"npm run client\""

How to run React front-end + Express back-end concurrently, Generally, in order to run your React app with your Node Express API back-end on your local host server, you would usually need to run� Concurrently run Express and Create-React-App issue. Ask Question Asked 2 years, 7 months ago. Active 2 years, 7 months ago. Viewed 1k times 1. 1. I've built a

That is because you already have a process bound to the port 5000. I think you already ran the same thing before & likely that process is still assigned the same port. Try and kill process OR listen your server on different port. As of add this to your server side code:-

const A_PORT = 6000;
app.listen(A_PORT, () => console.log(`LISTENING ON PORT ${A_PORT}`));

and always remember to terminate the process correctly by CTRL + C, by sending the request SIGINT.

How To Make create-react-app work with a Node Back-end API, "express": "^4.16.4" }, "devDependencies": { "concurrently": "^4.0.1" } }. Notice I am using concurrently to run the React app and Server at the� If you use npm you can use npm init react-app react-express-app --typescript. Another option is using npx. This will allow you to use the boilerplate without installing it. To use npx use npx

You can try this npm-run-all --parallel start-dev client

Please first install npm-run-all: "^4.1.3" before executing above script.

Or you can try npm run start-dev && npm run client

Concurrently npm with React Js, I have a project which is created using Node express and React Js. The start -- prefix client", "dev": "concurrently \"npm run server\" \"npm run� Express is a popular unopinionated web framework, written in JavaScript and hosted within the Node.js runtime environment. It is also a modern backend technology and popular among new developers. React, a simple and powerful library is gaining huge popularity among developers nowadays. The component architecture […]

concurrently, Running Reactjs app in one terminal, and a Nodejs app in another separate terminal Run Duration: 6:58 Posted: Nov 18, 2019 We also need to add scripts for running express server, running both, the server and also the app in parallel and also for building the app. First we will rename current script for running React app, the start, to start-front. The script for building, the build, to build-front. Next, we will add script for running the express server, start-server.

Run ReactJS and Nodejs in same terminal - Concurrently, Here we are going to setup react js plus node js, full-stack mkdir server; npm install express-generator -g; express - - view=ejs server npm start", "start": " concurrently - kill-others \"npm run server\" \"npm run client\"" }� In development, we set the NODE_ENV to development, and use the concurrently package to run both the front-end Webpack server (client) and Express server (server) scripts at the same time. This is like opening two terminals on your local machine, running npm run client in one, and npm run server in the other.

How to Setup React and Node JS in a project, you need to run your Express/Node.js backend server and your React UI The first NPM package I'll introduce you to is called Concurrently. Inside the React app’s folder (client), open up package.json (make sure it’s not Express’ package.json – it should have things like “react” and “react-scripts” in it). Under the “scripts” section, add the “proxy” line like this: