JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<div id="chartContainer" style="height: 275px; width: 100%;"></div>

JavaScript

window.onload = function () {
  var crossHairPositionY = null, crossHairPositionX = null;

  var chart = new CanvasJS.Chart("chartContainer", {
    title: {
      text: "Retaining Crosshair Value after render"
    },
    axisX: {
      crosshair: {
        enabled: true,
        hidden: function(e) {
          crossHairPositionX = null;
        }
      }
    },
    axisY: {
      crosshair: {
        enabled: true,
        hidden: function(e) {
          crossHairPositionY = null;
        }
      }
    },
    data: [{        
      type: "column",
      dataPoints: [
        { x: 10, y: 710 },
        { x: 20, y: 550 },
        { x: 30, y: 500 },
        { x: 40, y: 650 },
        { x: 50, y: 950 },
        { x: 60, y: 680 },
        { x: 70, y: 280 },
        { x: 80, y: 340 },
        { x: 90, y: 140 }
      ]
    }]
  });
  chart.render();

  setInterval(() => {
    chart.render();
	
  	//Check if crosshair positions is within plot area
    if( chart.axisX[0].bounds.x1 <= crossHairPositionX && chart.axisX[0].bounds.x2 >= crossHairPositionX && chart.axisY[0].bounds.y1 <= crossHairPositionY && chart.axisY[0].bounds.y2 >= crossHairPositionY) {
      if(crossHairPositionX != null && crossHairPositionY != null) {
        chart.axisX[0].crosshair.showAt(chart.axisX[0].convertPixelToValue(crossHairPositionX));
        chart.axisY[0].crosshair.showAt(chart.axisY[0].convertPixelToValue(crossHairPositionY));
      }
    }
    
  }, 1000);

  $(".canvasjs-chart-canvas").last().on("mousemove", function(e) {
    var parentOffset = $(this).parent().offset();
    var relX = e.pageX - parentOffset.left;
    crossHairPositionX = relX;
    var relY = e.pageY - parentOffset.top;
    crossHairPositionY = relY;
  });

}