import { Component, OnInit } from '@angular/core'; import { Router } from '@angular/router'; import { Hero } from './hero'; @Component({ selector: 'my-heroes', styleUrls: [ './heroes.component.css' ] }) export class HeroesComponent implements OnInit { heroes: Hero[]; selectedHero: Hero; constructor( private heroService: HeroService) { } getHeroes(): void { this.heroService.getHeroes().then(heroes => this.heroes = heroes); } ngOnInit(): void { } onSelect(hero: Hero): void { this.selectedHero = hero; } gotoDetail(): void { this.router.navigate(['/detail', this.selectedHero.id]); } }