Cancelable prefetch - v1

controllers.application.js

import Ember from 'ember';

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

router.js

import Ember from 'ember';
import config from './config/environment';

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

Router.map(function() {
  this.route('parent', function() {
    this.route('child');
  });
});

export default Router;

routes.parent.child.js

import Ember from 'ember';

export default Ember.Route.extend({  
  prefetch() {
    return this.prefetched('parent').then((res) => {
      if (res.isCanceled) {
        return { 
          message: 'Route load is canceled'
        };
      }

      return {
        message: 'We did it'
      };
    });
  }
});

routes.parent.js

import Ember from 'ember';

const isCanceled = true;

export default Ember.Route.extend({
  prefetch() { 
    if (isCanceled) {
      return {
        isCanceled: true
      };
    }
    
    // do stuff

    return {
      isCanceled: false
    };
  }
});

templates.application.hbs

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

templates.parent.child.hbs

 - {{model.message}} - 

templates.parent.hbs

{{outlet}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1",
    "ember-prefetch": "2.1.6"
  }
}