TypeScript 学习 - 创建一个项目

创建一个项目

• 实际使用中, 使用 yarn create react-app 比 npx create-react-app 更顺利一些.
• 使用 yarn create react-app ts-react-app --template typescript 创建一个 TypeScript 项目
• 使用 yarn create react-app ts-react-app 创建一个 JavaScript 项目
• 如果不使用脚手架创建, 可以安装依赖, 以及编写入口文件

package.json:

{
  "name": "ts_fx_02",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.14.1",
    "@testing-library/react": "^13.0.0",
    "@testing-library/user-event": "^13.2.1",
    "@types/jest": "^27.0.1",
    "@types/node": "^16.7.13",
    "@types/react": "^18.0.0",
    "@types/react-dom": "^18.0.0",
    "react": "^19.0.0",
    "react-dom": "^19.0.0",
    "react-scripts": "5.0.1",
    "typescript": "^4.4.2",
    "web-vitals": "^2.1.0"
  },
  "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"
    ]
  }
}

index.tsx:

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

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