Reports

I too struggled initially setting up Tailwind/Postcss initially, then I configured these steps combining documentations, all youtube tutorials. This will surely work, just go stepwise

Using the new Tailwind CSS Version 4+ Latest supports auto configurations. (learn more about it from documentations).
We don’t have tailwind.config.js and postcss.config.js anymore.

Start a fresh new App

Note: Ensure using Command Prompt CMD Terminal and not Powershell psl or Git Bash or others, inside your code editor.

I face no errors when doing this

1. Using Vite

npm create vite@latest my-app -- --template <template_name>

Eg. For React:

npm create vite@latest my-app -- --template react

2. Enter App

cd my-app

code -r my-app

Opens the app in another VS Code window.

3. Install Tailwind

npm install tailwindcss @tailwindcss/vite

Confirm the installation via package.json

"dependencies": {
  "@tailwindcss/vite": "^4.1.11",
  "react": "^19.1.0",
  "react-dom": "^19.1.0",
  "tailwindcss": "^4.1.11"
}

(With PostCss)

npm install -D @tailwindcss/postcss

and

npm install tailwindcss @tailwindcss/vite

Confirm the installation via package.json

"devDependencies": {
  "@eslint/js": "^9.35.0",
  "@tailwindcss/postcss": "^4.1.13",
  "@types/react": "^19.1.13",
  "@types/react-dom": "^19.1.9",
  "@vitejs/plugin-react": "^5.0.2",
  "eslint": "^9.35.0",
  "eslint-plugin-react-hooks": "^5.2.0",
  "eslint-plugin-react-refresh": "^0.4.20",
  "globals": "^16.4.0",
  "vite": "^7.1.6"
}

4. Add these two lines inside `vite.config.js`

import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'
import tailwindcss from '@tailwindcss/vite'  //1. Line 1

// https://vite.dev/config/
export default defineConfig({
  plugins: [
    tailwindcss(),   //2. Line 2
    react()
  ],
})

And press CTRL + S to save.

5. Import plugin inside React within CSS at top

project/src/index.css

@import "tailwindcss";

:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  .
  .
  remove this default css..
}

6. Configure App.jsx For trial

rfc

export default function App() {
  return (
    <h1 className='text-lg font-bold underline text-red-500'>
      YB-Tutorials
    </h1>
  )
}

7. Start Building

npm run dev

Visit http://localhost:5173/

Done...!

Test-app

79771192