Question 174881 in Javascript Question posted in
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Javascript – How can I run multiple React projects simultaneously on different ports?

I am not able to run many project in 3000 port at the same time.

How can I change react port for run multiple react project at the same time. Any solution for this problem?

Show this message:
Something is already running on port 3000.

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2

Answers


  1. 0

    Try changing the "scripts" section in your package.json, in the "start" also set the environment variable PORT with a value different than 3000:

    ...
"scripts": {
    "start": "set PORT=3500 && react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
...
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  2. 0

    If React app created with Vite, add port to server block in vite.config.js.

    import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [react()],

  server: {
    // change to desired port
    port: 3000
  }
})
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