title: Click through canvas is not working
body: <p>I am creating a doughnut (showing in pink) to represent data using the canvas. The problem is remaining area left by the canvas (filled with green in diagram) is not clickable in <code>IE</code> and <code>Safari</code> for Windows. I am using <code>pointer-events</code> for click through the canvas which is not supported by <code>IE</code> and <code>Safari</code>. Alternative solution is: I change the <code>z-index</code> which is very difficult implementing due to complex UI of the application.</p>
  
  <p><img src="https://i.stack.imgur.com/E1OYt.png" alt="enter image description here"></p>
  
  <p>Any hope except change the z-order? Thanks in advance! </p>