报错Warning: ReactDOM.render is no longer supported in React 18.Use createRoot instead.Until you...

报错不影响正常渲染页面，报错图示：

翻译如下：

反应域。React 18中不再支持渲染。改用createRoot。在你切换到新的API之前，你的应用程序将表现得像运行React 17。了解更多信息：https://reactjs.org/link/switch-to-createroot

点击后面的链接，可以看到下图：

把里面的文字翻译如下：

React 18 introduces a new root API which provides better ergonomics for managing roots. The new root API also enables the new concurrent renderer, which allows you to opt-into concurrent features.

React 18引入了一种新的根API，该API为管理根提供了更好的人体工程学。新的根API还支持新的并发渲染器，允许您选择并发功能。

在下面还有代码：

// 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); // createRoot(container!) if you use TypeScript
root.render(<App tab="home" />);

根据以上内容，可以这样子解决这个报错

更改前入口文件代码：

import ReactDOM from 'react-dom'
import App from '../App'ReactDOM.render(<Router />, document.getElementById('root')
)

更改后index.js代码如下：

import { createRoot } from 'react-dom/client';
import App from '../App'//第一种写法
const container = document.getElementById('root');
const root = createRoot(container);
root.render( <App />);
//第二种写法
createRoot(document.getElementById('root')).render( <App />)

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