app-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import {TodoappComponent} from './todoapp/todoapp.component';

const routes: Routes = [
  { path: '', redirectTo: '/', pathMatch: 'full' },
  { path: 'todoapp', component: TodoappComponent},
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }