title: How to animate rotate around center in fabric js
body: <p>When you use one of the handle bars to rotate an object in fabricjs it will rotate the object around center. However, when using </p>
  
  <pre><code>tri.animate('angle', 45, {
    onChange: canvas.renderAll.bind(canvas)
  });
  </code></pre>
  
  <p>It will rotate around the top-left corner. How to rotate around center just like with the handle bar?</p>
  
  <p>Example: <a href="http://jsfiddle.net/QQ6eA/1/" rel="nofollow">http://jsfiddle.net/QQ6eA/1/</a></p>