create-react-app w/ TypeScript & Tailwind CSS; Tailwind's utility classes are not being applied

Question

I've been searching all over to try and resolve this issue. I created a React app with TypeScript and installed Tailwind CSS using the React setup shown on the Tailwind site here.

Below is my code and configuration. It runs successfully when I do a npm run start, but the Tailwind styles are not applied.

App.tsx

import React from 'react';
import logo from './logo.svg';
import './App.css';

function App() {
  return (
    <div className="items-center justify-center">
    <h1 className="text-3xl font-bold underline">
      Testing
    </h1>
    </div>
  );
}

export default App;

index.tsx

import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';

const root = ReactDOM.createRoot(
  document.getElementById('root') as HTMLElement
);
root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);
reportWebVitals();

index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

postcss.config.js

module.exports = {
  plugins: {
    tailwindcss: {},
    autoprefixer: {},
  },
}

tailwind.config.js

/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    "./src/**/*.{js, jsx, ts, tsx}",
  ],
  theme: {
    extend: {},
  },
  plugins: [],
}

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
    "allowJs": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx"
  },
  "include": [
    "src"
  ]
}

package.json

{
  "name": "mortgage-calc",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.16.4",
    "@testing-library/react": "^13.3.0",
    "@testing-library/user-event": "^13.5.0",
    "@types/jest": "^27.5.2",
    "@types/node": "^16.11.43",
    "@types/react": "^18.0.15",
    "@types/react-dom": "^18.0.6",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "react-scripts": "^5.0.1",
    "typescript": "^4.7.4",
    "web-vitals": "^2.1.4"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "autoprefixer": "^10.4.7",
    "postcss": "^8.4.14",
    "tailwindcss": "^3.1.5"
  }
}

My output

Answer 1

Try to remove the spaces between the file endings in your tailwind.config.js:

/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    "./src/**/*.{js,jsx,ts,tsx}",
  ],
  theme: {
    extend: {},
  },
  plugins: [],
}

If that doesn't correct your problem, try to remove the CSS import in your App.tsx:

import React from 'react';
import logo from './logo.svg';

function App() {
  return (
    <div className="items-center justify-center">
    <h1 className="text-3xl font-bold underline">
      Testing
    </h1>
    </div>
  );
}

export default App;