title: Run canvas on background tab
body: <p>I have recently created a HTML5 canvas animation (also using Processing.js).</p>
  
  <p>The problem is that when I switch the browser to a different tab the animation stops playing.</p>
  
  <p>How can I allow the animation to keep playing while the user is on a different tab than the one containing the animation?</p>
  
  <p>Example:
  <a href="http://jsfiddle.net/EyFTr/3/" rel="noreferrer">http://jsfiddle.net/EyFTr/3/</a></p>
  
  <p>If you switch tabs the clock stops, but if you open the link a new window and blur the window the clock will still move.</p>