Create React App + TypeScript 项目中 Tailwind CSS 工具类不生效求助

已按照Tailwind官方的Create React App配置指南搭建项目并完成Tailwind配置，执行npm run start后项目能正常启动，但页面里的Tailwind工具类样式完全没效果。以下是项目的代码与配置文件，以及当前无样式的效果截图：

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"
  }
}

当前效果 #

检查下来有两个核心问题导致样式失效：

1. 修复tailwind.config.js的路径匹配问题
   你的content配置中，文件扩展名之间多了空格："./src/**/*.{js, jsx, ts, tsx}"，空格会导致Tailwind无法正确识别文件路径。把空格删除，修改为：

   content: [
     "./src/**/*.{js,jsx,ts,tsx}",
   ],
   

2. 清理干扰性默认样式
   App.tsx中导入的./App.css是Create React App生成的默认样式文件，里面包含全局margin、字体等样式，虽然不会直接阻止Tailwind生效，但可能覆盖或干扰样式表现。如果不需要默认样式，直接删除App.css文件，同时删掉App.tsx里的import './App.css';语句。

修改完成后，重启npm run start，Tailwind工具类样式即可正常生效。

内容的提问来源于stack exchange，提问作者Mr. Hargrove