类型错误:无法读取 null 的属性“getState”。我没有安装redux。我正在尝试将 react antd 菜单添加到我的侧边栏页面。但问题是如果我在 App.js 中添加它不会呈现。现在我收到 TypeError: Cannot read property 'getState' of null。你能告诉我怎么修吗?
显示此错误:
索引.js
import React from 'react';
import ReactDOM from 'react-dom';
import 'antd/dist/antd.css';
import App from './App';
ReactDOM.render(
<React.StrictMode>
<App />
</React.StrictMode>,
document.getElementById('root')
);
应用程序.jsimport React from 'react';
import Login from './Components/login';
import Sidebar from './Components/sidebar';
import Course from './Components/course';
import Downloads from './Components/downloads';
import Settings from './Components/settings';
import About from './Components/about';
function App() {
return (
<div className="container">
<Sidebar />
</div>
);
}
export default App;
这是代码:侧边栏.js
import React from 'react';
import { Menu } from 'antd';
import { MailOutlined, CalendarOutlined } from '@ant-design/icons';
function Sidebar() {
return (
<React.Fragment>
<Menu.Item key="1" icon={<MailOutlined />}>
Courses
</Menu.Item>
<Menu.Item key="2" icon={<CalendarOutlined />}>
Downloads
</Menu.Item>
</React.Fragment>
);
}
export default Sidebar;
包.json{
"name": "udeler",
"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",
"antd": "^4.9.1",
"node-sass": "^4.14.1",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-router-dom": "^5.2.0",
"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"
]
}
}
最佳答案
Menu.Item
组件必须出现在 Menu
中成分。
所以你需要把它包裹在 Menu
中成分。
你得到的错误是因为在内部 Menu
创建上下文和 Menu.Item
尝试访问它,但在您的情况下没有找到它。
关于reactjs - 类型错误 : Cannot read property 'getState' of null,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/65179745/