Add new dataPoint on clicking over plotArea - CanvasJS JavaScript Charts

Add new dataPoint on clicking over plotArea - 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 chart = new CanvasJS.Chart("chartContainer",{
	  title: {
		text: "Click over PlotArea to Add New DataPoints"
	  },
	  
	  data: [
	  {
		type: "spline",
		dataPoints: [
			{ x: 10, y: 71 },
			{ x: 20, y: 55 },
			{ x: 30, y: 50 },
			{ x: 40, y: 65 },
			{ x: 50, y: 95 },
			{ x: 60, y: 68 },
			{ x: 70, y: 28 },
			{ x: 80, y: 34 },
			{ x: 90, y: 14 }
		  ]
		},{
		type: "scatter",
    markerType: "triangle",
		dataPoints: []
		}					
	  ]
	});
	chart.render();
	
	jQuery(".canvasjs-chart-canvas").last().on("click", 
		function(e){
			var parentOffset = $(this).parent().offset();
			var relX = e.pageX - parentOffset.left;
			var relY = e.pageY - parentOffset.top
			var xValue = Math.round(chart.axisX[0].convertPixelToValue(relX));
			var yValue = Math.round(chart.axisY[0].convertPixelToValue(relY));
		
			chart.data[1].addTo("dataPoints", {x: xValue, y: yValue});
			
		});