indexLabelFormatter: Function

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
 data:[{
    dataPoint :[
       { x: 10, y : 12,  
                indexLabelFormatter: function (e) { return  e.dataPoint.y ; } 
       },  
         
}],
 .
 . 
});
chart.render();

• By using indexLabelFormatter, you can return any value to be displayed as indexLabel.
  Below is the structure of object passed as parameter to the function

  e: { // parameter sent to function
         chart,
         dataSeries,
         dataPoint,
         index,        // Available only in range charts
         total,        // Available only in stacked, pie and doughnut charts
         percent,      // Available only in stacked, pie and doughnut charts
   }
  

• index parameter is available only in case of range charts. It is undefined in case of other chart types.