title: Use bind-attr helper with input helper in emberjs
body: <p>I want to use bind-attr and input helpers together so i can assign class to my input field. I have a workaround to do so like creating a parent dom and use bind-attr on that</p>
  
  <pre><code>&lt;td {{bind-attr class="showmsg:alert-msg"}} &gt;{{input type="text" value=rank}}&lt;/td&gt; 
  </code></pre>
  
  <p>How can I use bind-attr inside the input helper?</p>