Template Switcher

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Template Switcher',
  template: null,
  
  actions: {
  	setTemplate(template) {
    	this.set('template', template);
    },
  },
});

template-a.component.js

import Ember from 'ember';

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

template-a.template.hbs

Template A

template-b.component.js

import Ember from 'ember';

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

template-b.template.hbs

Template B

template-c.component.js

import Ember from 'ember';

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

template-c.template.hbs

Template C

templates.application.hbs

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

<button onclick={{action 'setTemplate' 'template-a'}}>Template A</button>

<button onclick={{action 'setTemplate' 'template-b'}}>Template B</button>

<button onclick={{action 'setTemplate' 'template-c'}}>Template C</button>

<hr />

{{component template}}

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": true,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
  }
}