indeterminate component

components.component-the-first.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.component-the-second.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.main-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  state: 'first',

  subComp: Ember.computed('state', function () {
    return `component-the-${this.get('state')}`;
  }),
  
  init() {
    this._super(...arguments);
    setTimeout(this.bumpState.bind(this), 1000);
  },
  
  bumpState() {
    this.set('state', 'second');
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>

{{main-component
  state="first"
}}

templates.components.component-the-first.hbs

<h1>FIRST</h1>

templates.components.component-the-second.hbs

<h2>second :(</h2>

templates.components.main-component.hbs

Component

{{component subComp}}

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}