NavController doesn't work in Ionic 4

Now, to complete the final step and implement those routes in our app-routing.module.ts file, they would look like this:

const routes: Routes = [
{ path: '', redirectTo: '/home', pathMatch: 'full' },
{ path: 'home', loadChildren: './pages/home/home.module#HomeModule' },
{ path: 'products', loadChildren: './pages/products/products.module#ProductsModule'},
{ path: 'products/:id', loadChildren: './pages/product-detail/product-detail.module#ProductDetailModule' },
{ path: 'products/categories', loadChildren: './pages/product-categories/product-categories.
{ path: 'support', loadChildren: './pages/support/support.module#SupportModule' }
];

setRoot in html page

<ion-button href="/support" routerDirection="root">

or in class

this.navCtrl.navigateRoot('/support');

Push

<ion-button href="/products/12" routerDirection="forward">

or

this.navCtrl.navigateForward('/products/12');

Pop

<ion-button href="/products" routerDirection="backward">

or

<ion-back-button defaultHref="/products"></ion-back-button>

you can also navigate backwards programatically:

this.navCtrl.navigateBack('/products');

p/s: https://www.joshmorony.com/converting-ionic-3-push-pop-navigation-to-angular-routing-in-ionic-4/

NavController as this is deprecated in IONIC 4.

Structure is like this.

     V3                 V4
/src/pages     ->   /src/app/pages
/src/models    ->   /src/app/models
/src/providers ->   /src/app/providers

• You can use pages if you have pages directory.

• You can use parameters if you want to pass it.

  this.router.navigate('/pages, { locs: this.locId }])');

Example: With Pages directory.

this.router.navigate(['/list'], { locs: this.locId }]);

Example: Without Pages directory and parameters.

this.router.navigate(['/list']);

This link is useful for the tabs. For more Info go through this link. [https://medium.com/modus-create-front-end-development/upgrading-an-ionic-3-application-to-ionic-4-eaf81a53cdea][1]

---

Extras:

After navigate to new page, we can get the locsId using this.route.snapshot.paramMap.get('locs') by importing private route: ActivatedRoute inside the current page constructor

Example:

export class ListPage implements OnInit {

  constructor(private route: ActivatedRoute) {
    console.log("this.route.snapshot.paramMap.get : ", this.route.snapshot.paramMap.get('locs'));
  }

  ngOnInit() {
  }

}

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

@Component({
 ...
})
export class LoginComponent {
 constructor(private router: Router){}

    navigate(){
       this.router.navigate(['/detail'])
    }
}

for more info click here