我正在尝试在React中实现withRouter,所以我已将其导入为这样
import { BrowserRouter, Route, Switch , withRouter} from "react-router-dom";
然后在最后一行中,我写了以下内容
export default withRouter(App);
但是我收到错误
You should not use <withRouter(App) /> outside a <Router>
我正在尝试在我的app.js中实现它,如下所示
class App extends React.Component {
constructor(props) {
super(props);
console.log("PROPS APPJS")
console.log(props)
//checks if user is autheticated within the system in order to manage routes
this.state = {
authenticationChecked: false,
isAuthenticated: false
}
}
componentDidMount() {
//calls the auth service to decide the auth state value
isAuthenticated().then((result) => {
if (result === true) {
this.setState({ isAuthenticated: true, authenticationChecked: true})
} else {
this.setState({ isAuthenticated: false, authenticationChecked: true})
}
});
}
login = (email, password) => {
var thiscomponent = this;
axios({
method: 'post',
url: 'http://localhost:3003/login',
data: qs.stringify({ email, password }),
headers: {
'content-type': 'application/x-www-form-urlencoded;charset=utf-8'
}
}).then(res => {
console.log("set cookie")
//the accestoken is set as a cookie in order to check routes
Cookies.set('accesstoken', res.data.accesstoken);
console.log("those are the props")
console.log(this.props);
this.setState({ isAuthenticated: true }, () => {
thiscomponent.props.history.push('/');
})
}).catch(err => {
console.log(err)
})
}
render() {
if (!this.state.authenticationChecked) return null;
return (
<BrowserRouter>
<Switch>
<Route exact path="/login" render={(props) => <LoginPage login={this.login} {...props} />} />
<PrivateRoute authed={this.state.isAuthenticated} exact path="/register" render={(props) => <RegisterPage />} />
<PrivateRoute authed={this.state.isAuthenticated} exact path="/" render={(props) => <NewLandingPage {...props} />} />
<PrivateRoute authed={this.state.isAuthenticated} path="/page1" render={(props) => <Page1 />} />
<PrivateRoute authed={this.state.isAuthenticated} path="/page2" render={(props) => <Page2 />} />
</Switch>
</BrowserRouter>
)
}
}
export default withRouter(App);
那里可能是什么问题?我实际上在那里有一个browserrouter,难道它也不应该也是路由器吗?
答案 0 :(得分:3)
您在BrowserRouter
中有App
,但是当您使用withRouter
时,用withRouter
渲染孩子的父母必须有BrowserRouter
。 >
因此从BrowserRouter
中删除App
并在App
内渲染BrowserRouter
ReactDOM.render(
<BrowserRouter>
<App />
</BrowserRouter,
container
)
此外,如果将方法用作箭头函数,则无需存储this
上下文,因为它始终会指向类实例
答案 1 :(得分:0)
问题很可能来自您正在执行的身份验证检查。无论结果如何,您都将组件包装在withRouter()中,因此,如果authenticationChecked为false withRouter()无法访问任何路由,因此会出错。
您的解决方案可能是为登录名创建一个组件,然后将您的BrowserRouter等包装在这样的层次结构中:
return (
<LoginProvider>
<MyBrowserRouter>
<Router>
</MyBrowserRouter>
</LoginProvider>
);
然后,您可以将MyBrowserRouter包裹在withRouter()中,但是根据您的身份验证检查,使LoginProvider的呈现带有孩子。