ChartJs to get point information being clicked upon - Javascript Chart.js

Javascript examples for Chart.js:Chart Configuration

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Description

ChartJs to get point information being clicked upon

Demo Code

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<html>
   <head> 
      <title>line chart with ChartJS</title> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.1.1/Chart.min.js"></script> 
      <script type="text/javascript">
    window.onload=function(){/* w w  w .j  a v a2  s  .c om*/
var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fillColor: "rgba(220,220,220,0.2)",
            strokeColor: "rgba(220,220,220,1)",
            pointColor: "rgba(220,220,220,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(220,220,220,1)",
            data: [65, 59, 80, 81, 56, 55, 40]
        },
        {
            label: "My Second dataset",
            fillColor: "rgba(151,187,205,0.2)",
            strokeColor: "rgba(151,187,205,1)",
            pointColor: "rgba(151,187,205,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(151,187,205,1)",
            data: [28, 48, 40, 19, 86, 27, 90]
        }
    ]
};
var canvas = document.getElementById("chart");
var ctx = canvas.getContext("2d");
var chart = new Chart(ctx).Line(data);
canvas.onclick = function (evt) {
    var points = chart.getPointsAtEvent(evt);
    console.log(chart.datasets[0].points.indexOf(points[0]));
};
    }

      </script> 
   </head> 
   <body> 
      <canvas id="chart" width="300" height="150"></canvas>  
   </body>
</html>

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