未捕获错误:不变违规:元素类型无效:对象

Question

我正在摆弄react-router,试图实现简单的路由.我在他们的例子中写了我的代码(但没有imports)https://github.com/rackt/react-router#whats-it-look-like.

我在浏览器中收到此错误:

未捕获错误:不变违规:元素类型无效:期望一个字符串(对于内置组件)或一个类/函数(对于复合组件)但得到:object.

这就是我的工作.

我在页面上附加脚本,ReactRouter.min.js我的代码在react-routes.js.而且还react和react-dom和jQuery(所有三个app.js):

<script src="/js/app.js" type="text/javascript" charset="utf-8"></script>
<script src="https://npmcdn.com/react-router/umd/ReactRouter.min.js"></script>
<script src="/js/react-routes.js" type="text/javascript" charset="utf-8"></script>

这是我的react-router.js,尚未编译:

'use strict';
window.Router = window.ReactRouter;
window.Link = window.ReactRouter.Link;
window.Route = window.ReactRouter.Route;

const Foo = React.createClass({
    render() {
        return (
            <div>
                <h1>HELLO, me FOO</h1>
            </div>
        )
    }
});

ReactDOM.render((
    <Router>
        <Route path="/" >
            <Route path="/page/one" component={Foo}/>
        </Route>
    </Router>
), document.getElementById('content-section'))

这是我react-router.js与Babel汇编后的.我在页面上正好附上了这个:

babel --presets react -o public/js/react-routes.js assets/js/react-routes.js:

'use strict';

window.Router = window.ReactRouter;
window.Link = window.ReactRouter.Link;
window.Route = window.ReactRouter.Route;

const Foo = React.createClass({
    displayName: "Foo",

    render() {
        return React.createElement(
            "div",
            null,
            React.createElement(
                "h1",
                null,
                "HELLO, me FOO"
            )
        );
    }
});

// Error is thrown here, in this line
ReactDOM.render(React.createElement(
    Router,
    null,
    React.createElement(
        Route,
        { path: "/" },
        React.createElement(Route, { path: "/page/one", component: Foo })
    )
), document.getElementById('content-section'));

我做错了什么？为什么会抛出错误？路由器是一个对象,而不是React组件.为什么？我看一下这个例子并以同样的方式输入我的代码https://github.com/rackt/react-router#whats-it-look-like

Answer 1

您的

window.Router = window.ReactRouter;

应该

window.Router = window.ReactRouter.Router;

您正在尝试使用错误<Router />,但是它Router是对React Router库(而不是Router组件)的引用.