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

当我将nothingundefined作为值传递给我创建的子组件时,发生了这个问题。我做了这个<MyComponent src="" />导致错误。然后将其更改为<MyComponent src=" " />,因为我真的不想传递任何东西…问题解决了。

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

在我的情况下,我只需要从react-router-redux升级到react-router-redux@next。我猜肯定是兼容性问题。

我刚刚花了30分钟来解决这个基本的问题。

我的问题是我导入react原生元素

例如导入React,{文本,图像,组件}从' React ';

并试图使用它们,这导致我收到这个错误。

一旦我从<文本>切换到<p>和<图像>到<img>,一切都按预期工作。

xxxxx.prototype = {
  dxxxx: PropTypes.object.isRequired, // eslint-disable-line react/forbid-prop-types
};

你必须添加// eslint-disable-line react/ forbidden -prop-types,然后它就工作了!

试试这个

npm i react-router-dom@next

在你的App.js中

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

const Home = () => <h1>Home</h1>

const App = () =>(
  <Router>
    <Route path="/" component={Home} />
  </Router>
)

export default App;