Exploring the Angular Heroes tutorial with the unique app-heroes CSS selector

While going through the Angular tutorial at https://angular.io/tutorial/toh-pt1#selector, one particular sentence caught my attention: "The CSS element selector, 'app-heroes', matches the name of the HTML element that identifies this component within a parent component's template." This statement left me puzzled as I couldn't find any HTML element with the name app-heroes or anything similar. How does this type of CSS selector work? I have my heroes components defined in a folder structure /src/app/heroes. Could it be constructing a name based on "parentfolder-folder"? And what exactly is being targeted by the css element selector?

htmlcssangular

Answer №1

I need some clarification on the sentence: "The CSS element selector, 'app-heroes', matches the name of the HTML element that identifies this component within a parent component's template."

@Component({
  selector: 'app-heroes',
  templateUrl: './heroes.component.html',
  styleUrls: ['./heroes.component.css']
})

Looking at the @Component section, it specifies the selector as app-heroes. This indicates that you will use app-heroes similarly to an html element (for example, <div> </div>). Therefore, you will utilize 

<app-heroes></app-heroes>
to display the view of HeroesComponent.

Answer №2

Take a look below where it is written Show the HeroesComponent view. Right there, you will find this HTML code:

<h1>{{title}}</h1>
<app-heroes></app-heroes>

Therefore, your CSS selector app-heroes corresponds to this HTML element 

<app-heroes></app-heroes>
. It works similar to how CSS selector h1{} matches <h1></h1>

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