Customize the tooltip of a Chart.js 2.0 Doughnut Chart - Javascript Chart.js

Javascript examples for Chart.js:Chart Tooltip

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Description

Customize the tooltip of a Chart.js 2.0 Doughnut Chart

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/2.5.0/Chart.min.js"></script> 
      <script type="text/javascript">
    window.onload=function(){//from   ww w .j ava 2 s. c o  m
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
  type: 'doughnut',
  data: {
    labels: ["Red", "Blue", "Yellow"],
    datasets: [{
      label: '# of Votes',
      data: [12, 19, 3],
      backgroundColor: [
        'rgba(255, 99, 132, 0.2)',
        'rgba(54, 162, 235, 0.2)',
        'rgba(255, 206, 86, 0.2)'
      ],
      borderColor: [
        'rgba(255,99,132,1)',
        'rgba(54, 162, 235, 1)',
        'rgba(255, 206, 86, 1)'
      ],
      borderWidth: 1
    }]
  },
  options: {
    tooltips: {
      callbacks: {
        title: function(tooltipItem, data) {
          return data['labels'][tooltipItem[0]['index']];
        },
        label: function(tooltipItem, data) {
          return data['datasets'][0]['data'][tooltipItem['index']];
        },
        afterLabel: function(tooltipItem, data) {
          var dataset = data['datasets'][0];
          var percent = Math.round((dataset['data'][tooltipItem['index']] / dataset["_meta"][0]['total']) * 100)
          return '(' + percent + '%)';
        }
      },
      backgroundColor: '#FFF',
      titleFontSize: 16,
      titleFontColor: '#0066ff',
      bodyFontColor: '#000',
      bodyFontSize: 14,
      displayColors: false
    }
  }
});
    }

      </script> 
   </head> 
   <body> 
      <canvas id="myChart" height="100"></canvas>  
   </body>
</html>

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