React Code Splitting

routes-before.js

import { Switch, Route } from 'react-router-dom';
import Login from './pages/Login';
import Dashboard from './pages/Dashboard';
import User from './pages/User';

const Routes = () => {
  return (
    <Switch>
      <Route path="/login" exact component={Login} />
      <Route path="/dashboard" exact component={Dashboard} />
      <Route path="/users" exact component={User} />
    </Switch>
  );
};

export default Routes;