Flex Liquid-Fire

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  show: true,
  notShow: Ember.computed.not('show')
});

styles.app.css

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

.parent {
  display: flex;
  flex-direction: row;
}
.child {
  min-width: 100px;
  min-height: 100px;
}

.fluid {
  flex: 1 1 auto;
}
.fix {
  flex: 0 0 auto;
}

.red {
  background-color: red;
}

.green {
  background-color: green;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<div>
  <div>
  <label>{{input type="checkbox" checked=show}}Toggle</label>
  </div>
  <label>1 Liquid-If</label>
  <div class="parent">
    {{#liquid-if show class=(if show "slideAnimation fix" "slideAnimation fluid")}}
      <div class="child fix red">Fix</div>
    {{else}}
      <div class="child fluid green"><div>Fluid</div></div>
    {{/liquid-if}}
  </div>
  <br>
  <label>2 Liquid-If</label>
  <div class="parent">
    {{#liquid-if show class="slideAnimation fix"}}
      <div class="child fix red">Fix</div>
    {{/liquid-if}}
    {{#liquid-if notShow class="slideAnimation fluid"}}
      <div class="child fluid green"><div>Fluid</div></div>
    {{/liquid-if}}
  </div>  
</div>
<br>
<br>

transitions.js

export default function() {
  this.transition(
    this.hasClass('slideAnimation'),
    this.toValue(true),
    this.use('toRight'), 
    this.reverse('toLeft')
  );
}

twiddle.json

{
  "version": "0.11.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.0",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.11.0",
    "ember-testing": "2.11.0"
  },
  "addons": {
  	"liquid-fire": "0.27.1"
  }
}