angutron/src/app/app-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home/home.component';
import { AboutComponent } from './about/about.component';

const routes: Routes = [
  {
    path:'home', component: HomeComponent, 
  },{
    path:'about', component: AboutComponent
  },
  { path: "**", redirectTo: "/home?title=Welcome",  }
];

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