title: Background-size: cover not setting height of background image
body: <p>I'm trying to get a background image to fill a div completely. Using </p>
  
  <pre><code>.class{
     background-image: url('img.jpg');
     background-repeat: no-repeat;
     background-size: cover;
   }
  </code></pre>
  
  <p>and (<code>.row</code> is from Foundation 6)</p>
  
  <pre><code>&lt;div class="row columns"&gt;
    &lt;div class="class"&gt;&amp;nbsp;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>The image extends across the width of the container, however the height is only about 23px, presumably the line height of the <code>&amp;nbsp;</code>. How can I get his image's height to be the full height of the image with at the width set by <code>cover</code>?</p>