尝试得到react-router (v4.0.0)和react-hot loader (3.0.0-beta.6)很好地发挥,但在浏览器控制台得到以下错误:

Warning: React.createElement: type is invalid -- expected a string
(for built-in components) or a class/function (for composite
components) but got: undefined. You likely forgot to export your
component from the file it's defined in.

index.js:

import React from 'react';
import ReactDom from 'react-dom';
import routes from './routes.js';
require('jquery');
import 'bootstrap/dist/css/bootstrap.min.css';
import 'bootstrap/dist/js/bootstrap.min.js';
import './css/main.css';

const renderApp = (appRoutes) => {
    ReactDom.render(appRoutes, document.getElementById('root'));
};

renderApp( routes() );

routes.js:

import React from 'react';
import { AppContainer } from 'react-hot-loader';
import { Router, Route, browserHistory, IndexRoute } from 'react-router';
import store from './store/store.js';
import { Provider } from 'react-redux';
import App from './containers/App.jsx';
import Products from './containers/shop/Products.jsx';
import Basket from './containers/shop/Basket.jsx';

const routes = () => (

    <AppContainer>
        <Provider store={store}>
            <Router history={browserHistory}>
                <Route path="/" component={App}>
                    <IndexRoute component={Products} />
                    <Route path="/basket" component={Basket} />
                </Route>
            </Router>
        </Provider>
    </AppContainer>

);

export default routes;

当前回答

我得到了这个错误,没有一个响应是我的情况下,这可能会帮助一些人谷歌:

我定义了一个错误的Proptype:

ids: PropTypes.array(PropTypes.string)

它应该是:

ids: PropTypes.arrayOf(PropTypes.string)

VSCode和编译错误没有给我一个正确的提示。

其他回答

我所缺少的是我正在使用

import { Router, Route, browserHistory, IndexRoute } from 'react-router';

正确答案应该是:

import { BrowserRouter as Router, Route } from 'react-router-dom';

当然你需要添加npm包react-router-dom:

npm install react-router-dom@next --save

这真的很简单。当我开始编写React时,我遇到了这个问题,这个问题几乎总是因为导入:

import React, { memo } from 'react';

你可以对它进行解构,因为react lib有一个memo属性,但你不能这样解构

import { user } from 'assets/images/icons/Profile.svg';

因为它不是一个对象。

希望能有所帮助!

我得到了这个错误,没有一个响应是我的情况下,这可能会帮助一些人谷歌:

我定义了一个错误的Proptype:

ids: PropTypes.array(PropTypes.string)

它应该是:

ids: PropTypes.arrayOf(PropTypes.string)

VSCode和编译错误没有给我一个正确的提示。

EDIT

你把过程复杂化了。只要这样做:

index.js:

import React from 'react';
import ReactDom from 'react-dom';
import routes from './routes.js';
require('jquery');
import 'bootstrap/dist/css/bootstrap.min.css';
import 'bootstrap/dist/js/bootstrap.min.js';
import './css/main.css';

ReactDom.render(<routes />, document.getElementById('root'));

routes.js:

import React from 'react';
import { AppContainer } from 'react-hot-loader';
import { Router, Route, browserHistory, IndexRoute } from 'react-router';
import store from './store/store.js';
import { Provider } from 'react-redux';
import App from './containers/App.jsx';
import Products from './containers/shop/Products.jsx';
import Basket from './containers/shop/Basket.jsx';

const routes =
    <AppContainer>
        <Provider store={store}>
            <Router history={browserHistory}>
                <Route path="/" component={App}>
                    <IndexRoute component={Products} />
                    <Route path="/basket" component={Basket} />
                </Route>
            </Router>
        </Provider>
    </AppContainer>;

export default routes;

当我在我的渲染/返回语句中有一个糟糕的引用时,这个问题出现在我身上。(指向不存在的类)。 还要检查return语句代码中的错误引用。