ChartJS to get points information on hovering the points - Javascript Chart.js

Javascript examples for Chart.js:Doughnut Chart

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Description

ChartJS to get points information on hovering the points

Demo Code

ResultView the demo in separate window 

<html>
   <head> 
      <title>chart.js onHover</title> 
      <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(){/*from w w w. j a  v a  2  s . c o m*/
var data = {
  labels: ["January", "February", "March", "April", "May", "June", "July"],
  datasets: [{
    label: "My First dataset",
    backgroundColor: "rgba(255,99,132,0.2)",
    borderColor: "rgba(255,99,132,1)",
    borderWidth: 2,
    hoverBackgroundColor: "rgba(255,99,132,0.4)",
    hoverBorderColor: "rgba(255,99,132,1)",
    data: [65, 59, 20, 81, 56, 55, 40],
  }]
};
var option = {
  legend: false,
  title: {
    display: true,
  },
  onHover: function(evt) {
    var item = myLineChart.getElementAtEvent(evt);
    if (item.length) {
       console.log("onHover",item, evt.type);
      console.log(">data", item[0]._index, data.datasets[0].data[item[0]._index]);
    }
  },
  onClick: function(evt) {
    var el = myLineChart.getElementAtEvent(evt);
    console.log("onClick",el,evt);
  }
};
var myLineChart = Chart.Line('myChart', {
  data: data,
  options: option
});
    }

      </script> 
   </head> 
   <body> 
      <canvas id="myChart" width="400" height="200"></canvas>  
   </body>
</html>

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