old-crm-integration/client/src/App.js

import React, { Component } from 'react';
import './App.css';
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';

import NotFound from './scenes/NotFound';

import { mainMenuItems } from './constants/menuItems';

class App extends Component {
    render() {
        return (
            <Router>
                <Switch>
                    {
                        mainMenuItems.map(mainMenuItem =>
                            <Route key={mainMenuItem.id}
                                   exact
                                   path={mainMenuItem.url}
                                   component={mainMenuItem.component}
                            />)
                    }
                    <Route component={NotFound} />
                </Switch>
            </Router>
        );
    }
}
export default App;