Get clicked bar chart tooltip data - Javascript Chart.js

Javascript examples for Chart.js:Bar Chart

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Description

Get clicked bar chart tooltip data

Demo Code

ResultView the demo in separate window 

<html>
   <head> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.min.js"></script> 
      <script type="text/javascript">
    window.onload=function(){//w w w .j  ava2s.co m
var data = {
   labels: ['Jan', 'Feb', 'Mar'],
   datasets: [{
      label: 'medium',
      data: [3, 1, 4],
      backgroundColor: 'rgba(0, 119, 220, 0.5)'
   }, {
      label: 'low',
      data: [2, 5, 1],
      backgroundColor: 'rgba(0, 119, 220, 0.2)'
   }]
};
var title = 'BAR CHART';
var tool = new Chart(canvas, {
   type: 'bar',
   data: data,
   options: {
      legend: {
         display: true,
         labels: {
            fontColor: 'rgb(255, 99, 132)'
         },
         position: 'bottom'
      },
      title: {
         display: true,
         text: title
      },
      scales: {
         xAxes: [{
            stacked: true,
            barPercentage: 5.0,
            categoryPercentage: 0.2
         }],
         yAxes: [{
            stacked: true,
            ticks: {
               beginAtZero: true
            },
            barPercentage: 0.3
         }]
      },
      events: ["click"],
      hover: {
         mode: 'nearest'
      },
      onClick: function(event, element) {
         var activeElement = element[0];
         var data = activeElement._chart.data;
         var barIndex = activeElement._index;
         var datasetIndex = activeElement._datasetIndex;
         var datasetLabel = data.datasets[datasetIndex].label;
         var xLabel = data.labels[barIndex];
         var yLabel = data.datasets[datasetIndex].data[barIndex];
         console.log(datasetLabel, xLabel, yLabel);
      }
   }
});
    }

      </script> 
   </head> 
   <body> 
      <canvas id="canvas"></canvas>  
   </body>
</html>

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