title: retrieve the same offsetX on touch like mouse event
body: <p>Hello I am trying to get the offsetX,Y of touch event which should be identical to offsetX of mouse event. To do so I have used this code:</p>
  
  <pre><code> ev.offsetX = ev.targetTouches[0].pageX- canvasName.offsetLeft
  </code></pre>
  
  <p>I have even tried to simulate the touch event into mouse event but for that purpose i need the offsetX/Y, which is unavailable in touch event. Is there any way offsetX/Y can be calculated for touch? Please help</p>