New Twiddle

controllers.application.js

import Ember from 'ember';

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

services.query-count.js

import Ember from 'ember';

export default Ember.Service.extend({
  
  const DEFAULT_COUNT = 0;
 
  export default Service.extend({
 
    init() {
     this.metaTabCount = DEFAULT_COUNT;
     this.recentQueryTabCount = DEFAULT_COUNT;
   },
 
    setMetaTabCount(count = DEFAULT_COUNT) {
     console.log('updated meta count in service', count);
     this.set('metaTabCount', count);
   },
 
    setRecentQueryTabCount(count = DEFAULT_COUNT) {
     console.log('updated RQ count in service', count);
     this.set('recentQueryTabCount', count);
     this.notifyPropertyChange('recentQueryTabCount');
   },
 
    resetAll() {
     this.setMetaTabCount(DEFAULT_COUNT);
     this.setRecentQueryTabCount(DEFAULT_COUNT);
   }
});

templates.application.hbs

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

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": true,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  }
}