ionic homepage with tabs

app.routing.module.ts

import { NgModule } from '@angular/core';
import { PreloadAllModules, RouterModule, Routes } from '@angular/router';

import { MenuPage } from './pages/menu/menu.page';

const routes: Routes = [
  {
    path: '',
    loadChildren: './home/home.module#HomePageModule'
  },
  {
    path: 'menu',
    component: MenuPage,
    children: [
      {
        path: 'first',
        loadChildren: './pages/first/first.module#FirstPageModule'
      },
      {
        path: 'second',
        loadChildren: './pages/second/second.module#SecondPageModule'
      }
    ]
  },
  // { path: 'menu', redirectTo: '/menu/first' }
];

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

home.page.ts

import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';

@Component({
  selector: 'app-home',
  templateUrl: './home.page.html',
  styleUrls: ['./home.page.scss'],
})
export class HomePage implements OnInit {

  constructor(private router: Router) {}

  ngOnInit() {
	setTimeout(() => {
		this.router.navigateByUrl('/menu/first');
	}, 2000);  //2s
  }

}

menu.routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

import { MenuPage } from './menu.page';

const routes: Routes = [
    {
        path: 'menu',
        component: MenuPage
    }
];

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