我试图使用减速器构建简单的react-redux应用程序。但每次我打开网站时都会弹出此错误，并且无法打开控制台。我尝试清理 cookie 和缓存，但没有帮助。
每当我更改<Posts />和<Form />为简单<h1>标签时，它都工作得很好，但我找不到错误。我在index.js中的代码：
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { createStore, applyMiddleware, compose } from 'redux';
import thunk from 'redux-thunk';
import { reducers } from './reducers/index.js';
import App from './App';
const store = createStore(reducers, compose(applyMiddleware(thunk)));
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById('root'),
);应用程序.js
import React,{ useEffect, useState } from 'react';
import { Container, AppBar, Typography, Grid, Grow } from '@material-ui/core';
import …