找不到模块：错误：可以解决react-dom/client＆＃x27;

Question

我正在使用以下软件包使用React：

{
  "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看起来如下：

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;

当我使用运行我的应用程序时npm运行启动我会收到以下错误：

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，并且还列出了npm list list：

>  npm list
[email protected] /home/Desktop/Code/demo_app
├── @testing-library/[email protected]
├── @testing-library/[email protected]
├── @testing-library/[email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
└── [email protected]

为什么我遇到问题来编译应用程序的任何建议？

Answer 1

的版本是17.0.2），则索引。

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

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

总而言之，如果您

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>
);

使用的是React 17（我 问题，当我将React 18项目降级为React 17项目时。
我

npm install react@17 react-dom@17

用于打字稿项目，

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

Answer 2

好的！首先，这就是我所做的。我在React ^16.14.0上遇到了这个问题。我从index.js文件中的“ react-dom/client”中删除了“ client”。我还评论了

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

那里并使用了

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

。另外，

import reportWebVitals from "./reportWebVitals"; and reportWebVitals();

也发表了评论。执行此操作后，您的代码应该成功编译。**

Answer 3

对于React版本18.1（带打字稿），
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 4

解决此问题的简单解决方案是首先更新您的React版本。更改React 18的index.js

。

npm安装react-dom@最新react@最新

安装了react 18后，如果您仍面临错误，则必须将index.js文件更改为如下所述：

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 5

ReactDOM.render is no longer supported in React 18. Use createRoot instead. 
Until you switch to the new API, your app will behave as if it’s running React 
17.
LINK :https://reactjs.org/link/switch-to-createroot


// Before
import { render } from 'react-dom';
const container = document.getElementById('app');
render(<App tab="home" />, container);

// After
import { createRoot } from 'react-dom/client';
const container = document.getElementById('app');
const root = createRoot(container); 
root.render(<App tab="home" />);

upgrade react-dom to 18.2.0 using **npm i [email protected]**
.
.
.
If this don't work make sure react and react-dom packages should be downloaded 
as same version for ex:   "react": "^18.2.0",
                          "react-dom":"^18.2.0",
                                     or
                          "react": "^17.2.0",
                          "react-dom":"^17.2.0".

Answer 6

我也有类似的问题，我通过

 "noImplicitAny": false

在tsconfig.json上添加来解决它

Answer 7

我的问题是类型软件包也没有升级。我必须更新新的react> react和react-dom软件包的@Type导入。

yarn add @types/react @types/react-dom

Answer 8

当我使用

笔记：

仅修改package.json文件。运行npm install以更新您的已安装软件包和软件包 - 洛克.json。

我忘记运行npm install，React版本仍然旧（16.14.0）。

因此，在使用命令升级包版本之后，

$ ncu -f react -u

我们仍然需要运行npm install以更新node_modules中的已安装软件包。

您可以使用npm ls react -depth = 0检查已安装的React的版本

Answer 9

对我有用的最终解决方案只是将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 10

您仍然在依赖项中拥有旧版本的“ react”和“ react-dom”。
要解决它：

1. 删除这两行：

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

2. 用：删除

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

3. “ node_modules”文件夹
4. do npm npm install
   这应该解决您的问题并将您的应用更新为React18

Answer 11

您可能需要降级react和react-dom，以下是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>
);