<ion-app></ion-app> is the only template selector for app.component.ts?

Hi, I’m new to Ionic2.

When I start a new Porject, this is the basic code for app.component.ts I get.

import { Component } from ‘@angular/core’;

      templateUrl: 'app.html'
export class MyApp {}

and this is www/index.html

      <!-- Ionic's root component and where the app will load -->


      <!-- (...) -->

However, if I put my own selector <root-app></root-app> instead of <ion-app></ion-app>?
This is what i get:


I’ve searched the Docs and other Topics for this but found no answer.
If anyone could show me where this is in the Docs, or answer me directly, i would be grateful!


That selector seems to be hardcoded in app-root.ts, so I would recommend just sticking with <ion-app>.

That was my doubt!