How can I tell if a website is capturing my mouse movements?

Question

I'm talking about whether I move a mouse at all without clicking. Can a website detect that and capture it? Is there a way in the console or using a program?

Also, is it possible to capture mouse movements server side?

Answer 1

You can detect and capture mouse move on clientSide and there is possibility to send that coordinates of mouse from client side to server side ie. every 10 ms.

$( "div" ).mousemove(function( event ) {
  var pageCoords = "( " + event.pageX + ", " + event.pageY + " )";
  var clientCoords = "( " + event.clientX + ", " + event.clientY + " )";
  $( "span:first" ).text( "( event.pageX, event.pageY ) : " + pageCoords );
  $( "span:last" ).text( "( event.clientX, event.clientY ) : " + clientCoords );
});

Working example Example on JSFiddler