hero-list.component.html

ngOnInit() {
    this.heroes$ = this.store.select(getHeroes);
    this.isFirst$ = this.store.select(getIsFirstPage);
    this.isLast$ = this.store.select(getIsLastPage);
    this.isLoading$ = this.store.select(getIsLoading);

    this.store.dispatch(new FetchHeroes());
  }