JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    
  <div id="chartContainer" style="height: 300px; width: 100%;"></div>

JavaScript

var chart = new CanvasJS.Chart("chartContainer", {        
  axisX:{
    minimum: 5,
    maximum: 95
  },
  axisY: [{
    title: "Prices",
    prefix: "$ "
  }],
  title: {
    text: "Try dragging to reposition dataPoint",
  },
  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 }
      ]
    },
    {
      type: "line",
      dataPoints: [
        { x: 10, y: 171 },
        { x: 20, y: 155 },
        { x: 30, y: 150 },
        { x: 40, y: 165 },
        { x: 50, y: 195 },
        { x: 60, y: 168 },
        { x: 70, y: 128 },
        { x: 80, y: 134 },
        { x: 90, y: 114 }
      ]
    } 
  ]
});

chart.render();


var xSnapDistance = 5; //10 percentage
var ySnapDistance = 5; //10 percentage

var xValue, yValue, yValueDifference;

var mouseDown = false;
var selectedDataPoint = null, selectedDataSeries = null;
var changeCursor = false;

var timerId = null;

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

function searchDataPoint() {
	var dps = [];
  for(var j = 0; j < chart.data.length; j++) {
  dps = chart.data[j].dataPoints;
    for(var i = 0; i < dps.length; i++ ) {
      if( (xValue >= dps[i].x - xSnapDistance  && xValue <= dps[i].x + xSnapDistance) && 
         (yValue >= dps[i].y - ySnapDistance && yValue <= dps[i].y + ySnapDistance ) ) {
        if(mouseDown) {
          selectedDataPoint = i;
          selectedDataSeries = j;
          break;
        }
        else {
          changeCursor = true;
          break; 
        }
      } else {
  ...