some behavior after a
binding has finished synchronizing.</p>
<p>You can set up an observer on an object by using <code>Ember.observer</code>:</p>
<pre class="language-javascript line-numbers"><code class="javascript language-javascript">Person <span class="token operator">=</span> Ember<span class="token punctuation">.</span>Object<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  <span class="