reactjs - 我很难启动或运行一个简单的 React JS

问题描述

我很难启动或运行一个简单的 React JS。她是我的 2 个简单文件和 package.json。

应用程序.js

export default App;const App = () => {
    return (
        <div className="container">
            <h1>Hello World</h1>
        </div>
    )
}

export default App

index.js

import { render } from ReactDOM
import App from './App'

render(<App />, document.getElementById('app'))

包.json

{
  "name": "first-react-application",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.13.0",
    "@testing-library/react": "^11.2.7",
    "@testing-library/user-event": "^12.8.3",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-scripts": "4.0.3",
    "web-vitals": "^1.1.2"
  },
  "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"
    ]
  }
}

我已经尝试启动 index.js 并启动 App.js。我没有得到任何错误服务器只是不会运行。我尝试连接到 127.0.0.0:3000 和 localhost:3000 并且我的浏览器从未连接。

任何帮助将不胜感激。

谢谢道森

标签： reactjs

reactjs - 我很难启动或运行一个简单的 React JS

问题描述

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