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>

JavaScript

var chart = new CanvasJS.Chart("chartContainer", {
  data: [{		
    type: "error",
    whiskerThickness: 0,
    toolTipContent: "{x}: {y[1]}",
    dataPoints: [
      { x: 10, y: [0, 30], stemThickness: 60 },
      { x: 20, y: [0, 30], stemThickness: 60 },
      { x: 30, y: [0, 30], stemThickness: 70 },
    ]
  }]
});

chart.render();


var xSnapDistance = 15;

var ySnapDistance = 1;

var relX, relY;

var yValue;

var mouseDown = false;
var selected = null;
var changeCursor = false;

var timerId = null;

function getPosition(e) {
  var parentOffset = $("#chartContainer > .canvasjs-chart-container").offset();          	
  relX = e.pageX - parentOffset.left;
  relY = e.pageY - parentOffset.top;
  yValue = Math.round(chart.axisY[0].convertPixelToValue(relY));
}

function searchDataPoint() {

  var dps = chart.data[0].dataPoints;

  for(var i = 0; i < dps.length; i++ ) {
    if( (relX <= (chart.axisX[0].convertValueToPixel(chart.options.data[0].dataPoints[i].x) + chart.options.data[0].dataPoints[i].stemThickness/2) + xSnapDistance && relX >= (chart.axisX[0].convertValueToPixel(chart.options.data[0].dataPoints[i].x) - chart.options.data[0].dataPoints[i].stemThickness/2) - xSnapDistance) && yValue <= dps[i].y[1] + ySnapDistance) {
      if(mouseDown) {
        selected = i;
        break;
      }
    } 
  }
}

jQuery("#chartContainer > .canvasjs-chart-container").on({
  mousedown: function(e) {
    mouseDown = true;
    getPosition(e);  
    searchDataPoint();
  },
  mousemove: function(e) {
    getPosition(e);

    if(mouseDown) {
      clearTimeout(timerId);
      timerId = setTimeout(function(){

        if(selected != null) {

          var xValueInPixels = chart.axisX[0].convertValueToPixel(chart.options.data[0].dataPoints[selected].x);
          var stemThickness = chart.options.data[0].dataPoints[selected].stemThickness/2;
          var data  = chart.options.data[0].dataPoints[selected];
          var dps = chart.data[0].dataPoints;

          // selecting the...