javascript - 热重载在我的 React 应用程序中不起作用

Question

我用 npx create-react-app 创建了这个应用程序。在此之后，我删除了 src 文件夹中除 index.js 之外的所有文件。然后热重载不起作用。我已经转到 chrome 并手动刷新页面以查看更改。
这是我的 index.js 文件。

import React from 'react';
import ReactDom from 'react-dom';

function Greeting() {
  return (
    <div>
      <h1>hello World</h1>
      <ul>
        <li>Click Here</li>
      </ul>
    </div>
  );
}

ReactDom.render(<Greeting />, document.getElementById('root'));

包.json 文件

{
  "name": "tutorial",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.11.4",
    "@testing-library/react": "^11.1.0",
    "@testing-library/user-event": "^12.1.10",
    "react": "^17.0.1",
    "react-dom": "^17.0.1",
    "react-scripts": "4.0.1",
    "web-vitals": "^0.2.4"
  },
  "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"
    ]
  }
}

Answer 1

有一个问题 - https://github.com/facebook/create-react-app/issues/9904

一种解决方法是在 index.js 中添加以下代码以启用重新加载

if (module.hot) {
  module.hot.accept();
}

进行此更改后，您必须重新启动服务器