在chartjs中悬停时更改点大小和颜色

Question

I have made a line chart using chartjs. Now I want is whenever someone hover on the points the points size and color will change. I tried with some options but didn't manage to get it working. Can someone help me on this please?

javascript:

var ctx = $('#chart');
var myLineChart = new Chart(ctx, {
  type: 'line',
  data: {
   labels: [1, 2, 3, 4, 5],
   datasets: [{
    label: '# of votes',
     data: [1, 2, 3, 4, 5],
     fill: false
   }]
 }
})

Answer 1

To change the data point­ 's color and size on hover, you'll need to set pointHoverBackgroundColor and pointHoverRadius property (as needed) respectively for the dataset, like so ...

datasets: [{
   ...
   pointHoverRadius: 5,
   pointHoverBackgroundColor: 'red'
}]

ᴅᴇᴍᴏ

 var ctx = $('#chart'); var myLineChart = new Chart(ctx, { type: 'line', data: { labels: [1, 2, 3, 4, 5], datasets: [{ label: '# of votes', data: [1, 2, 3, 4, 5], fill: false, pointHoverRadius: 5, pointHoverBackgroundColor: 'red' }] } });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <canvas id="chart"></canvas>

Answer 2

Answering an old thread as accepted answer didn't work for me for bar-chart using ChartsJS. May be that was older version or the question was not for bar-chart, not sure. The following works on v2.8 for bar-chart:

hoverBackgroundColor: 'red',
hoverBorderColor: 'blue',
hoverBorderWidth : '3'

Ref1 : https://www.chartjs.org/docs/latest/charts/bar.html#interactions

Ref2 : https://www.chartjs.org/docs/latest/configuration/elements.html#point-configuration

Hoping it may help someone like me.