javascript - 使用 ReactJS 新上下文 API 时出现 React-router-V4 渲染错误

Question

我正在尝试将 React Router V4 与新的 React 上下文 API 一起使用。这是我的代码：

class App extends Component {
    static propTypes = {
        router: PropTypes.func.isRequired,
        module: PropTypes.string.isRequired,
        sideMenuConfig: PropTypes.string
    };

    render() {

        let baseName = "/" + this.props.module;

        // This will get my dashboard component, loading context from database
        let navComponent = (
            <MyCustomAppContextProvider>
                <AppContext.Consumer>
                    {context => 
                        <Dashboard
                            context={context}
                            module={this.props.module}
                            router={router}
                            sideMenuConfig={this.props.sideMenuConfig}
                        />
                    }
                </AppContext.Consumer>
            </MyCustomAppContextProvider>
            );

        let routes = null;
        if (!isAuthenticated()) {
            routes = <Auth 
                        baseName={baseName}
                     />;
        } else {
            routes = (
                <Switch>
                    <Route exact path="/logout" component={Logout} />
                    <Route exact path="/auth" component={Logout} />
                    <Route exact path="/" component={navComponent} />
                    <Route
                        exact
                        path="/:screen"
                        component={navComponent}
                    />
                    <Route
                        exact
                        path="/:screen/:action"
                        component={navComponent}
                    />
                    <Route
                        exact
                        path="/:screen/:action/:id"
                        component={navComponent}
                    />

                    <Route component={PageNotFoundError} />
                </Switch>
            );
        }

        return (
            <BrowserRouter basename={baseName}>
                {routes}
            </BrowserRouter>
        );
    }
}

export default App;

router包含一个路由器功能，它将根据导航路径加载我的屏幕。
module是模块名称。
sideMenuConfig是我的侧边菜单的 json 配置。

尝试运行时，我从反应路由器收到以下错误：

Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object

Check the render method of `Route`.

我希望在仪表板中接收所有传递的道具以及匹配属性来运行路由器。

标签： javascriptreactjsreact-router-v4react-context

Answer 1

问题是您没有将组件传递给Route

// THIS IS NOT A COMPONENT

let navComponent = (
  <MyCustomAppContextProvider>
    <AppContext.Consumer>
      {context => (
        <Dashboard
          context={context}
          module={this.props.module}
          router={router}
          sideMenuConfig={this.props.sideMenuConfig}
        />
      )}
    </AppContext.Consumer>
  </MyCustomAppContextProvider>
)

组件要么是class扩展的，React.Component要么是函数：

// THIS IS A COMPONENT 

let NavComponent = props => (
  <MyCustomAppContextProvider>
    <AppContext.Consumer>
      {context => (
        <Dashboard
          context={context}
          module={this.props.module}
          router={router}
          sideMenuConfig={this.props.sideMenuConfig}
        />
      )}
    </AppContext.Consumer>
  </MyCustomAppContextProvider>
)

更新您的更新：

你对什么是组件感到困惑

// THIS IS A COMPONENT
let Foo = props => <div />

// THIS IS NOT A COMPONENT
let Foo = <div />

您需要将一个组件传递给 Route 的组件属性：

let NavComponent = props => <MyCustomAppContextProvider>...

// YES
<Route component={NavComponent} />

// NO
<Route component={<NavComponent />} />