Service Actions

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  layout: Ember.inject.service('layout'),
  
  actions: {
    toggle() {
      this.get('layout').toggleBool();
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

services.layout.js

import Ember from 'ember';

export default Ember.Service.extend({
  someBool: true,
  toggleBool() {
    this.toggleProperty('someBool');
  }
});

templates.application.hbs

{{my-component}}

templates.components.my-component.hbs

<h2>Some component</h2>
<button {{action "toggle"}}>Toggle boolean!</button>

<p>someBool is: {{if layout.someBool 'True!' 'FALSE!!'}}</p>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "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"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}