Handlebars Whitespace Control (tilde operator)

controllers.application.js

import Ember from 'ember';

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

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {  
    return { foo: 'content' };
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<p>
  Sometimes in Handlebars templates you do not want to preserve
  surrounding whitespace (i.e if your template contains a trailing
  newline).
</p>

<br>
<hr>

No whitespace control: \{{model.foo}}

<pre>
  {{model.foo}}
</pre>

<hr>
<br>

Whitespace control leading: \{{~model.foo}}

<pre>
  {{~model.foo}}
</pre>

<hr>
<br>

Whitespace control trailing: \{{model.foo~}}

<pre>
  {{model.foo~}}
</pre>

<hr>
<br>

Whitespace control both: \{{~model.foo~}}

<pre>
  {{~model.foo~}}
</pre>

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"
  }
}