Yield Multiple Blocks

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

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

.wrapper {
  margin: 10px;
}

.block {
  padding: 20px;
  border: 1px solid black;
}

.print--active {
  background-color: #efef;
}

templates.application.hbs

{{#my-component as |block|}}
  {{#if block.isPrintActive}}
    I only render if print is active!
  {{else}}
    I only render if print is inactive!
  {{/if}}
{{/my-component}}

{{#my-component as |block|}}
  {{#if block.isPrintActive}}
    Do your default for non-print, I don't care.
  {{/if}}
{{/my-component}}

{{#my-component as |block|}}
  {{#unless block.isPrintActive}}
    Do your default for print, I don't care.
  {{/unless}}
{{/my-component}}

templates.components.my-component.hbs

<div class="wrapper">
  <div class="block print--active">
    {{yield (hash isPrintActive=true)}}
  </div>

  <div class="block print--inactive">
    {{yield (hash isPrintActive=false)}}
  </div>
</div>

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}