 controller for a <code>blog-post</code> route. In this controller, we are looking to keep track if the user has expanded the body or not.</p>
<div class="filename javascript"><div class="ribbon"></div><span>app/controllers/blog-post.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">import</span> Controller <span class="token keyword">from</span> <span class="token string">'@ember/controller'</span><span class="token punctuation">