New Twiddle

adapters.application.js

import JSONAPIAdapter from 'ember-data/adapters/json-api';
import AdapterFetch from 'ember-fetch/mixins/adapter-fetch';

export default JSONAPIAdapter.extend(AdapterFetch, {

  ajax() {
    let promise = this._super(...arguments);

    promise.finally(() => console.log('done'));
    
    return promise;
  },
  
});

controllers.application.js

import Ember from 'ember';
import { task, timeout, waitForProperty } from 'ember-concurrency';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  lol: false,
  
  foo: task(function * () {
   let { store } = this;
    
   let model = store.createRecord('test-model');
    
    try {
      yield model.save();
    } catch(error) {
      console.log('ERROR', error);
      throw error;
    }
    
    console.log('DONE');
  }),
  
  actions: {
    setLolToTrue() {
      this.set('lol', Math.random());
    }
  }
});

models.test-model.js

import Model from 'ember-data/model';

export default Model.extend({
});

templates.application.hbs

<h1>Welcome to ember-concurrency</h1>

<p>
Use this twiddle as a jumping off point for your ember-concurrency
experiments / bug reports.
</p>

<p>
  <button onclick={{perform foo}}>
    Perform foo
  </button><br>
</p>

<p>
  state: {{foo.state}}<br>
  last.value: {{foo.last.value}}
</p>

<p>
<button onclick={{action 'setLolToTrue'}}>
  Set Lol to true
</button>
</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",
     "ember-concurrency": "0.8.27",
     "ember-fetch": "latest"
  }
}