title: Image with object-fit not filling container
body: <p>I have a banner image that's wider than it is tall. I have a container div that displays different sizes of images, and for the banner style, I need it to stretch and/or squash to fill the parent div in both directions. I've looked at <code>object-fit:fill</code>, but it only seems to stretch the image horizontally - it doesn't do anything about making it fill the div vertically. </p>
  
  <p>A working example is <a href="https://codepen.io/EmmyS/pen/GMjKwO" rel="noreferrer" title="here">here</a>; code looks like this:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.tile {
    position: relative;
    float: left;
    margin: 10px;
    border: 4px solid green;
    height: 400px;
  }
  
  .deal {
    width: 342px;
    background: #ffffff;
  }
  
  .tileImage.promo {
    object-fit: fill;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="tile deal hsNational active"&gt;
    &lt;img class="tileImage promo" src="https://cdn.pixabay.com/photo/2015/12/13/09/42/banner-1090835_960_720.jpg" height="200px"&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>What am I doing wrong? (I've tried the various values for <code>object-fit</code>, and none of them do what I need.) The image should be squished horizontally and stretched vertically to completely fill the area inside the green border.</p>