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报错：

出现的原因：在于把react18使用的vite构建，在开发中因react版本太高与其他库不兼容，而在降级的时候，出现以上dom渲染出现报错。

解决：将 src/index.j文件改成如下

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))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();

注意在降级修改package.json时候需要注意react、react-dom的版本一致；然后重新 npm install 即可。以下给出package.json文件：

{"name": "hello-react","version": "0.1.0","private": true,"dependencies": {"@testing-library/jest-dom": "^5.17.0","@testing-library/react": "^13.4.0","@testing-library/user-event": "^13.5.0","react": "^16.14.0","react-dom": "^16.14.0","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"},"browserslist": {"production": [">0.2%","not dead","not op_mini all"],"development": ["last 1 chrome version","last 1 firefox version","last 1 safari version"]}
}