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Hero in HeroDetailComponent can be undefined: resetting prior to fetching
[examples/angular-tour-of-heroes]
/
src
/
app
/
hero-detail
/
hero-detail.component.ts
diff --git
a/src/app/hero-detail/hero-detail.component.ts
b/src/app/hero-detail/hero-detail.component.ts
index
d4c7289
..
4bbfe2e
100644
(file)
--- a/
src/app/hero-detail/hero-detail.component.ts
+++ b/
src/app/hero-detail/hero-detail.component.ts
@@
-12,7
+12,7
@@
import { Hero } from '../hero';
})
export class HeroDetailComponent implements OnInit {
})
export class HeroDetailComponent implements OnInit {
- hero: Hero;
+ hero: Hero
| undefined
;
constructor(
private route: ActivatedRoute,
constructor(
private route: ActivatedRoute,
@@
-27,6
+27,7
@@
export class HeroDetailComponent implements OnInit {
getHero(): void {
this.route.params.subscribe(params => {
const id: number = +params.id;
getHero(): void {
this.route.params.subscribe(params => {
const id: number = +params.id;
+ this.hero = undefined;
this.heroService.getHero(id).subscribe(hero => this.hero = hero);
});
}
this.heroService.getHero(id).subscribe(hero => this.hero = hero);
});
}