title: Add region around SVG path for mouseover
body: <p>Is there a way to add a region over a line path in an svg-generated graph?</p>
  
  <p>I want a user to be able to hover <strong>near</strong> , not just over, a line on a line chart and have things happen after the mouseover.</p>
  
  <p>Currently, with the code I have, you have to mouseover the actual line. But I want to set a region around the line. </p>
  
  <p>(Adding padding to the path doesn't seem to work)</p>