JSFiddle - React, Tailwind, and code Playground

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>
<div align="center">
<p id="customText">&#9635; Custom Legend</p>
</div>

JavaScript

var chart = new CanvasJS.Chart("chartContainer",
{
	axisX: {
  	crosshair: {
    	enabled: true      
    }
  },
  axisY: {
  	crosshair: {
    	enabled: true      
    }
  },
	data: [
	{
		type: "line",
		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 }
		]
	}					
	]
});

chart.render();

$(".canvasjs-chart-canvas").last().on("mousemove", 
	function(e){
		var parentOffset = $(this).parent().offset();
		var relX = e.pageX - parentOffset.left;
		var xValue = Math.round(chart.axisX[0].convertPixelToValue(relX));
    var relY = e.pageY - parentOffset.top;
		var yValue = Math.round(chart.axisY[0].convertPixelToValue(relY));    
    
    if((xValue > chart.axisX[0].minimum && xValue < chart.axisX[0].maximum) && (yValue > chart.axisY[0].minimum && yValue < chart.axisY[0].maximum)){
    		$("#customText").html("&#9635; " + xValue + " : " + yValue);
    }
	});