title: Is using position: relative on html tag advised?
body: <p>I just found out a solution for creating sticky footers:</p>
  
  <pre><code>html {
      position: relative;
  }
  #footer {
      position: absolute;
      bottom: 0;
      left: 0; right: 0;
  }
  </code></pre>
  
  <p>Though I am wondering on how advised it is to put <code>position:relative</code> on the <code>html</code> tag.</p>
  
  <p>The way I understand it: instead of <code>position: absolute</code> being relative to the viewport, it becomes relative to the document.</p>
  
  <p>Is this good practice?</p>