Chartjs-Chart js – Customize chart

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How can I change the size of canvas?

Usually, ChartJS displays chart in a responsive manner, meaning it won’t take canvas­‘s width and height (set by user) into consideration.

To get around this, you need to set responsive property to false in your chart options, like so …

options: {
  responsive: false,
  ...
}

Now, you could set canvas­‘s width and height as per your requirement.

<canvas id="chartMentes" width="400" height="800"></canvas>

How can I change the height of each bar?

You can change the height of each bar by setting the barThickness property accordingly for y-axis in the chart options, like so …

options: {
    scales: {
      yAxes: [{
            barThickness: 10,  //set that suits the best
            ...
}

ᴅᴇᴍᴏ

var ctx = document.getElementById("chartMentes").getContext('2d');
var myChart = new Chart(ctx, {
    type: 'horizontalBar',
    data: {
        labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            backgroundColor: [
            	'rgba(255, 99, 132, 0.2)',
              'rgba(54, 162, 235, 0.2)',
              'rgba(255, 206, 86, 0.2)',
              'rgba(75, 192, 192, 0.2)',
              'rgba(153, 102, 255, 0.2)',
              'rgba(255, 159, 64, 0.2)'],
            borderColor: [
            	'rgba(255,99,132,1)',
              'rgba(54, 162, 235, 1)',
              'rgba(255, 206, 86, 1)',
              'rgba(75, 192, 192, 1)',
              'rgba(153, 102, 255, 1)',
              'rgba(255, 159, 64, 1)'],
            borderWidth: 1
        }]
    },
    options: {
        responsive: false,
        scales: {
            yAxes: [{
                barThickness: 10,
                ticks: {
                    beginAtZero: true
                }
            }]
        }
    }
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js"></script>
<canvas id="chartMentes" width="300" height="200"></canvas>

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