app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { UrlSerializer } from '@angular/router';

import { AppComponent } from 'app/app.component';

import { CustomUrlSerializer } from './custom-url-serializer';

@NgModule({
  imports: [
    BrowserModule
  ],
  declarations: [ AppComponent ],
  providers: [
    { provide: UrlSerializer, useClass: CustomUrlSerializer }
  ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }