The hash (#) serves as a divider in the loadChildren syntax. It distinguishes the path leading to the lazily loaded module and the name of the class of the lazily loaded module. For example:
@NgModule({
imports: [
RouterModule.forRoot([
{ path: 'welcome', component: WelcomeComponent },
{
path: 'products',
canActivate: [ AuthGuard ],
data: { preload: true },
loadChildren: 'app/products/product.module#ProductModule'
},
{ path: '', redirectTo: 'welcome', pathMatch: 'full' },
{ path: '**', component: PageNotFoundComponent }
]
],
exports: [ RouterModule ]
})
export class AppRoutingModule { }
The plus sign (+) could potentially be a symbol utilized within the folder name. Although it may not be commonly seen, it could hold significance within the context of that specific team.