ifCond example

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  someVal: true,
  actions: {
    toggleSomeval() {
      this.toggleProperty('someVal');
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<p>someVal: {{someVal}}</p>
<button {{action 'toggleSomeval'}}>Toggle someVal</button>
<br>
{{#if-cond someVal true}}
  <h1>Rendering!</h1>
{{else}}
  <h1>Rendering alternative!</h1>
{{/if-cond}}
<br>
<br>

if-cond.component.js

import Ember from 'ember';
const { computed } = Ember;

const ifCond = Ember.Component.extend({
  tagName: '', // by specyfing tagName as empty we don't render any additional dom elements
  isTrue: computed('arg1', 'arg2', function() {
    console.log(this.get('arg1'));
    return this.get('arg1') === this.get('arg2');
  })
});

ifCond.reopenClass({
  positionalParams: ['arg1', 'arg2']
});

export default ifCond;

if-cond.template.hbs

{{#if isTrue}}
  {{yield}}
{{else}}
  {{yield to="inverse"}}
{{/if}}

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}