Dynamic updatation of datapoint from the value taken from Prompt value upon clicking any datapoint | CanvasJS JavaScript Charts

Dynamic updatation of datapoint from the value taken from Prompt value upon clicking any datapoint | CanvasJS JavaScript Charts

by Khanh Le

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", {
	theme: "light2",
	title: {
  	text: "Update value from User Input"
  },
  subtitles: [{
  	text: "Click on any dataPoint to update value"
  }],
  data: [
    {
      type: "column",
      click: function(e) {
        /* var updatedValue = prompt("Please enter new value", e.dataPoint.y);        
        if (updatedValue === null || updatedValue === "" || updatedValue.match(/^\s*$/g) || isNaN(updatedValue)) {
          alert("You either Cancelled / Entered invalid input")
        } else {
          e.dataPoint.y = Number(updatedValue);
          chart.render();          
        } */
        console.log(e.dataPoint.color);
/*         e.dataPoint.color = e.dataPoint.color == "#A9A9A9" ? "#8470ff" : "#A9A9A9";
        chart.render(); */
      },
      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: -1 }
      ]
    }					
  ]
});

chart.render();