<h2>My Heroes</h2>
+<div>
+ <label>Hero name:
+ <input #heroName />
+ </label>
+ <!-- (click) passes input value to add() and then clears the input -->
+ <button (click)="add(heroName.value); heroName.value=''">
+ add
+ </button>
+</div>
<ul class="heroes">
<li *ngFor="let hero of heroes">
<a routerLink="/detail/{{hero.id}}">