New Twiddle

components.ui-btn.js

import Ember from 'ember';

const { Logger: { assert } , tryInvoke } = Ember;

const PromiseProxy = Ember.Object.extend(Ember.PromiseProxyMixin);
const isPromise = (p) => typeof p === 'object' && p !== null && typeof p.then === 'function';

export default Ember.Component.extend({
  tagName: 'button',
  
  promise: null,
  
  state: Ember.computed('promise', function(){
  	const promise = this.get('promise');
    
     if(isPromise(promise)) {   
    		return PromiseProxy.create({ promise }) 
     }
  }),
  
  click() {	
   	const returnVal = tryInvoke(this, 'action');
    
    if(isPromise(returnVal)) { 
    	this.set('promise', returnVal);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions:{
    async() {
      return new Promise((res) => {
        setTimeout(res, 3000);
      })
    },
    failAsync() {
      return new Promise((res,rej) => {
        setTimeout(rej, 3000);
      })
    },                                      
  	simple() {
    	return 123;
    }
  }
});

templates.application.hbs

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

{{#ui-btn action=(action 'simple') }}
  Simple button
{{/ui-btn}}



{{#ui-btn action=(action 'async') }}
  Promise button
{{/ui-btn}}

{{#ui-btn action=(action 'failAsync') }}
  Failure Promise button
{{/ui-btn}}

templates.components.ui-btn.hbs

{{yield}}
{{#if state.isPending}}
  ⏳
{{/if}}

{{#if state.isRejected}}
  ⛔
{{/if}}

{{#if state.isFulfilled}}
  ✅
{{/if}}

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"
  }
}