react項(xiàng)目在登錄之后，F(xiàn)5刷新頁(yè)面又跳轉(zhuǎn)到登錄頁(yè)面。如何在刷新頁(yè)面時(shí)調(diào)用一個(gè)接口讓后臺(tái)查看session判斷是否已登錄？<Router>     <Provider store={store}>         <Switch>             <Route path="/login" component={Login}/>             <PrivateRoute path="/" component={MainLayout} />         </Switch>     </Provider></Router>這個(gè)ajax請(qǐng)求放在哪里比較合適？