New Twiddle

components.x-trigger.js

import Ember from 'ember';
import { task } from 'ember-concurrency';

const { Component, get, computed: { readOnly } } = Ember;

export default Component.extend({
  triggerTask: task(function* () {
    yield this.get('onTrigger')();
  }),

  actions: {
    trigger() {
      get(this, 'triggerTask').perform();
    }
  } 
});

controllers.application.js

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

const { RSVP: { Promise: P }, run: { later } } = Ember;

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  buttonLabel: 'normal action',
  
  something: task(function* () {
    yield timeout(1000);
    return "lol";
  }).drop(),
  
  actions: {
    promiseAction() {
      return new P((resolve) => {
        later(resolve, 1000);
      });
    }
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

templates.application.hbs

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

{{x-trigger onTrigger=(action (mut buttonLabel) 'changed') raised=true label=buttonLabel}}
{{x-trigger onTrigger=(perform something) raised=true label='task'}}
{{x-trigger onTrigger=(action 'promiseAction') raised=true label='promise'}}
<br>
<br>

templates.components.x-trigger.hbs

{{#paper-button onClick=(action 'trigger') label=label raised=raised disabled=triggerTask.isRunning}}
  {{#if triggerTask.isRunning}}
    {{paper-progress-circular diameter="35%"}}
  {{else}}
  {{#if hasBlock}}
    {{yield}}
  {{else}}
    {{label}}
  {{/if}}
  {{/if}}
{{/paper-button}}
{{isLoading}}

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-paper": "1.0.0-alpha.19",
    "ember-concurrency": "0.8.1"
  }
}