Axis Labels showing y values using labelFormatter - CanvasJS JavaScript Charts

Axis Labels showing y values using labelFormatter - CanvasJS JavaScript Charts

by canvasjs

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<br/>
<!-- Just so that JSFiddle's Result label doesn't overlap the Chart -->
<div id="chartContainer" style="height: 360px; width: 100%;"></div>

JavaScript

var dataPoints1 = [{x: 1, y: 20},{x: 2, y: 14},{x: 3, y: 25},{x: 4, y: 16},{x: 5, y: 17 },{x: 6, y: 22 },{x: 7, y:  19},{x: 8, y: 15},{x: 9, y: 12},{x: 10, y: 16},{x: 11, y: 14},{x: 12, y: 17},{x: 13, y: 16},{x: 14, y: 19 },{x: 15, y: 22},{x: 16, y: 12},{x: 17, y: 15},{x: 18, y: 12},{x: 19, y: 17},{x: 20, y: 14},{x: 21, y: 17},{x: 22, y: 16},{x: 23, y: 14},{x: 24, y: 17}];

var dataPoints2 =  [{x: 1, y: 19},{x: 2, y: 14},{x: 3, y: 23},{x: 4, y: 14},{x: 5, y: 16 },{x: 6, y: 19 },{x: 7, y: 15},{x: 8, y: 14},{x: 9, y: 10},{x: 10, y: 12},{x: 11, y: 23},{x: 12, y: 16},{x: 13, y: 14},{x: 14, y: 16},{x: 15, y: 16},{x: 16, y: 10},{x: 17, y: 14},{x: 18, y: 10},{x: 19, y: 16},{x: 20, y: 12},{x: 21, y: 16},{x: 22, y: 12},{x: 23, y: 12},{x: 24, y: 16}];

var chart = new CanvasJS.Chart("chartContainer", {
  title: {
    text: "Using labelFormatter function of axisX"
  },
  axisX: {  
    interval: 2,
    labelFormatter: function(e) {
      for(var i = 0; i < e.chart.data[0].dataPoints.length; i++){
        if(e.chart.data[0].dataPoints[i].x === e.value) {
          return label = "[" + e.chart.data[0].dataPoints[i].y + "," + e.chart.data[1].dataPoints[i].y + "]";
        }
      }     
    }
  },

  data: [{
    type: "column",
    color: "#3181bc",
    dataPoints: dataPoints1
  },{
    type: "column",
    color: "#cccccc",
    dataPoints: dataPoints2
  }]
});

chart.render();