title: Check if parent has class using LESS
body: <p>Example scenario: I would like to hide a sub-navigation menu if the user has javascript enabled so that it can be revealed on a click of a navigation link further up in the nav hierarchy. Modernizr adds a class 'js' to the html tag if javascript is enabled so I can use that for detection.</p>
  
  <p>In SASS I can do something like this:</p>
  
  <pre><code>div.subnav{
  
     display: block;
  
     html.js &amp; {
        display: none;
     }
  
  }
  </code></pre>
  
  <p>Can this be done using LESS? Can I target a parent from within another rule?</p>