title: Easy: Addclass removeClass hasClass issue?
body: <p>I have some buttons in a container div that need to toggle active but only 1 active button at a time. </p>
  
  <p>EDIT:</p>
  
  <p>html is: 
  div container of .filter(btn, btn, btn, etc)
  there are 3 containers of buttons. 
  The third container has a button with an id of: #filter1-none</p>
  
  <p>The code below works to have only 1 button active per group. </p>
  
  <p>Additionally, how would I remove active only from the button with an ID of #filter1-none ONLY if any of the other buttons are active?</p>
  
  <pre><code>$('.filter .btn').click(function () {
      $(this).addClass('active').siblings('.active').removeClass('active');
  });
  </code></pre>