title: How to prevent vh-units from ignoring the scrollbar?
body: <p>I am working on a page layout with a horizontal scrollbar.
  I have some panels with fixed widths in a horizontal order, which should all have the viewport height. I decided to test the <code>vh</code> unit to do that.</p>
  
  <pre><code>.panel { height: 100vh; }
  </code></pre>
  
  <p>This is working fine, until I get a scrollbar.
  The problem is, that <code>vh</code> ignores the height used by the scrollbar and therefore adds a vertical scrollbar.</p>
  
  <p>I would like to subtract the height of the scrollbar from the measurements of <code>vh</code>; is there any way to do this?</p>