Binding Chart to Canvas height width

Question

I am using Chart.js with the following html:

<canvas id="fisheye" width="100" height="100" style="border:1px solid;"></canvas>

And this is the Javascript part :

getChart: function () {
        var ctx = document.getElementById("fisheye");
        var myChart = new Chart(ctx, {
            type: 'bar',
            data: {
                labels: ["json1", "json2", "json3", "json4"],
                datasets: [{
                    label: '1.3.0 Version',
                    type: 'bar',
                    data: [52.4060092977, 90.0854057722, 196.576968515, 77.6216726434],
                    backgroundColor: [
                        'rgba(255, 99, 132, 0.2)',
                        'rgba(255, 99, 132, 0.2)',
                        'rgba(255, 99, 132, 0.2)',
                        'rgba(255, 99, 132, 0.2)'
                        // 'rgba(54, 162, 235, 0.2)',
                        // 'rgba(255, 206, 86, 0.2)',
                        // 'rgba(75, 192, 192, 0.2)'
                    ],
                    borderColor: [
                        'rgba(255,99,132,1)',
                        'rgba(255,99,132,1)',
                        'rgba(255,99,132,1)',
                        'rgba(255,99,132,1)'
                        // 'rgba(54, 162, 235, 1)',
                        // 'rgba(255, 206, 86, 1)',
                        // 'rgba(75, 192, 192, 1)'
                    ],
                    borderWidth: 1
                },
                {
                    label: '1.3.13 Version',
                    type: 'bar',
                    data: [50.0744953192, 93.5542439586, 153.288788005, 101.402897964],
                    backgroundColor: [
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 0.2)',
                        'rgba(54, 162, 235, 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)'
                    ],
                    borderColor: [
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)',
                        'rgba(54, 162, 235, 1)'
                        // 'rgba(255, 206, 86, 1)',
                        // 'rgba(75, 192, 192, 1)',
                        // 'rgba(153, 102, 255, 1)'
                    ],
                    borderWidth: 1
                }
                ]
            },
            options: {
                title: {
                    display: true,
                    text: 'Export Chart'
                },
                legend: {
                    display: true,
                },
                scales: {
                    yAxes: [{
                        ticks: {
                            beginAtZero:true,
                            stepSize:50
                        }
                    }]
                },
                responsive: true
            }
        });
        return myChart;
    }

My problem is that my chart seems to expand to full screen height and width. I would like to restrict my chart size to the canvas size. This way I can lay charts in a grid rather than per page (Note: I have shown code for only one chart, but you can imagine it to be similar for other charts)

Answer 1

It might be easier to wrap the canvas in a div/span/something and set the size there. As you have set responsive: true this means that chart.js tries to fill the parent on resize and it does this by setting the canvas height and width. https://jsfiddle.net/zpvfph9m/1/

<div style="width:50%">
   <canvas id="fisheye" width="400" height="400"></canvas>
</div>

Would this work for you?