handleWidth: Number

Sets the width of handle in pixels.

• We suggest not to set width/height property unless it is really required. When you don’t set the width/height of the handle, CanvasJS automatically takes the width/height of handle in proportion to the size of navigator.

var stockChart = new CanvasJS.StockChart("container",
{
 .
 .
 navigator: {
   .
   .
   slider: {
     handleWidth: 10
   },
   .
   .
 },
 .
 . 
});
stockChart.render();