Routes

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
  a = 'b';
}

router\.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  //this.route('index', { path: '/' });
  this.route('about', function() {
   	this.route('me');
    this.route('you');
  });
});

export default Router;

routes.about\.js

import Route from '@ember/routing/route';
import { action } from '@ember/object';

export default Route.extend({
  @action
  willTransition(transition) {
    if (transition.targetName === 'about.index') {
      this.transitionTo('about.me');
    }
	},

  beforeModel(transition) {
    console.log(transition.targetName);

    if (transition.targetName === 'about.index') {
      this.transitionTo('about.me');
    }
  }
  
});

templates.about.me\.hbs

me!

templates.about.you\.hbs

you!

templates.about\.hbs

About

{{outlet}}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

twiddle\.json

{
  "version": "0.17.0",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.15.0",
    "ember-template-compiler": "3.15.0",
    "ember-testing": "3.15.0"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}