Making lazy loading per module is pretty easy in Angular.

const routes: Routes = [
  {
    path: 'customers',
    loadChildren: () => import('./customers/customers.module').then(m => m.CustomersModule)
  },
  {
    path: 'orders',
    loadChildren: () => import('./orders/orders.module').then(m => m.OrdersModule)
  }
];

But this forces to me to download the module when I navigate to it the first time.

Is it possible to download ALL modules in the background after the first page load?.