找不到模块：错误：无法解析“react-dom/client”

Question

我正在使用对以下软件包做出反应：

{
  "name": "demo",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.16.4",
    "@testing-library/react": "^13.0.1",
    "@testing-library/user-event": "^13.5.0",
    "h3-js": "^3.7.2",
    "leaflet": "^1.7.1",
    "react": "^17.0.1",
    "react-dom": "^17.0.1",
    "react-leaflet": "3.0.2",
    "react-scripts": "5.0.1",
    "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"
    ]
  }
}

我的index.js 如下所示：

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'));
root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

reportWebVitals();

我的App.js 如下：

import React from "react";
import { render } from "react-dom";
import LeafletMap from "./Map";

class App extends React.Component {
  state = { resolution: 8, kRing: 0 };

  constructor(props) {
    super(props);
    this.state = { resolution: 8, kRing: 0 };
  }

  render() {
    return (
      <div>
        <LeafletMap
          resolution={this.state.resolution}
          kRing={this.state.kRing}
        />
        Resolution:
        <input
          type="number"
          min={0}
          max={15}
          onChange={this.onChangeResolution}
          defaultValue={8}
        />
        <br />
        K Rings:
        <input
          type="number"
          min={0}
          max={100}
          onChange={this.onChangeKRings}
          defaultValue={0}
        />
      </div>
    );
  }

  onChangeResolution = (e) => {
    this.setState({ resolution: Number.parseInt(e.target.value) });
  };
  onChangeKRings = (e) => {
    this.setState({ kRing: Number.parseInt(e.target.value) });
  };
}

export default App;

当我使用 npm run start 运行我的应用程序时，我收到以下错误：

Compiled with problems:X

ERROR in ./src/index.js 5:0-40

Module not found: Error: Can't resolve 'react-dom/client' in '/home/Desktop/Code/demo_app/src'

我重新安装了所有软件包，它也列在npm list：

>  npm list
demo_app@0.1.0 /home/Desktop/Code/demo_app
├── @testing-library/jest-dom@5.16.4
├── @testing-library/react@13.0.1
├── @testing-library/user-event@13.5.0
├── h3-js@3.7.2
├── leaflet@1.7.1
├── react-dom@17.0.1
├── react-leaflet@3.0.2
├── react-scripts@5.0.1
├── react@17.0.1
└── web-vitals@2.1.4

关于我在编译应用程序时遇到问题的任何建议？

Answer 1

对我有用的最终解决方案是将 React 18 index.js 文件更改为以下内容：

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

ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
  document.getElementById('root')
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
reportWebVitals();

Answer 2

您的依赖项中仍然有旧版本的“react”和“react-dom”。 解决它：

1. 删除这两行：

    "react": "^17.0.1",
    "react-dom": "^17.0.1",

1. 将它们替换为：

    "react": "^18.1.0",
    "react-dom": "^18.1.0",

1. 删除“node_modules”文件夹
2. 做npm install 这应该可以解决您的问题并将您的应用更新为 react18

Answer 3

你可能需要降级 React 和 react-dom，这里是 index.js:

React 17 示例：

import React from "react";
import { render } from "react-dom";
import "./index.css";
import App from "./App";

const root = document.getElementById("root");
render(<App />, root);

React 18 示例：

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

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

Answer 4

我有类似的问题，我通过添加解决了它

 "noImplicitAny": false

在 tsconfig.json 上

Answer 5

对于 React 18.1 版（带有打字稿）， 这对我有用

    import React from "react";
    import { createRoot } from "react-dom/client";
    import reportWebVitals from "./reportWebVitals";
    import App from "./App";
    const root = createRoot(
        document.getElementById("root") as HTMLElement
    );
    root.render(
       <React.StrictMode>
          <App />
       </React.StrictMode>
    );
    reportWebVitals();

Answer 6

总而言之，如果您使用的是 React 17（我的版本是 17.0.2），那么您的 index.js 必须如下所示，

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

ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
 document.getElementById('root')
);

如果您使用的是 React 18，您的 index.js 文件应如下所示

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

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

当我将 react 18 项目降级为 react 17 项目时，我遇到了问题。 我用过，

npm install react@17 react-dom@17

对于打字稿项目，

npm install react@17 @types/react@17 react-dom@17 @types/react-dom@17