ChartJS – is there any way to remove blank space around pie charts?

问题

I am dealing with a chart that has unwanted spacing on left and right side. I've been trying to remove it with no luck, and I don't know what else to do now. I've read the documentation thoroughly, but can't seem to find a solution. Is this possible to do? Let me know if more info is necessary, and I'll supply it.

Edit:

<div>
<canvas id="chart-gender"></canvas>  
</div>


<script>
var gender_data = [10, 35];

var graph_gender_preset = {
    labels: ["Female", "Male"],
    datasets: [
        {
            data: gender_data,
            backgroundColor: ["#0fa0e3", "#ff3549"]
        }
    ]
};

var ctx3 = $("#chart-gender");

var chart_gender = new Chart(ctx3, {
type: 'doughnut',
data: graph_gender_preset,
options: {
        responsive: true,
        title: {
            display: false,
            position: "top",
            fontStyle: "bold",
            fontSize: 0,
            fullWidth: false,
            padding: 0
        },
        legend: {
            display: false,
            position: "top",
            fullWidth: false,
            labels: { display: false, usePointStyle: true, fontSize: 15, fontStyle: "bold" }

        }
    }
});
</script>

回答1:

The problem is not the doughnut, it is the canvas in which it is used.

The doughnut has to use a quadratic box, otherwise it would look like an ellipsis. So if you change the size of the canvas and make it quadratic you won't have any borders anymore.

Here is an JS Fiddle example.

<table border="1">
  <tr>
    <td>
      First
    </td>
    <td>
      <canvas width="100%" height="100%" id="myChart"></canvas>
    </td>
    <td>
      Third
    </td>
  </tr>
</table>

回答2:

After ton of research, I found that setting width and height will remove that space.

<div>
<canvas id="chart-gender" width="300" height="300"></canvas>  
</div>

回答3:

I think responsive needs to be set to false, then the height and width properties work like this:

const options= {
 responsive: false
} 
<div>
  <canvas id="chart-gender" width="300" options={options} height="300"></canvas>  
</div>

来源：https://stackoverflow.com/questions/41546993/chartjs-is-there-any-way-to-remove-blank-space-around-pie-charts

标签

javascript

margin

chart.js

space