title: Angular Material datepicker have blank pop up
body: <p>I use angular material and I would like to implement md-datepicker. I do something like here :</p>
  
  <pre><code>&lt;md-input-container flex="100" layout="row"&gt;
      &lt;div flex="45"&gt;
          &lt;md-datepicker ng-model="$ctrl.myDate" placeholder="Enter date"&gt;&lt;/md-datepicker&gt;
      &lt;/div&gt;
  &lt;/md-input-container&gt;
  </code></pre>
  
  <p>Js looks like here:</p>
  
  <pre><code>var ctrl = this;
  ctrl.myDate = new Date();
  </code></pre>
  
  <p>I have <a href="https://i.stack.imgur.com/gtmKY.png" rel="nofollow noreferrer">enter image description here</a>
  Where I do mistake?</p>