The tension settings in Chart.JS appear unusual

I recently updated to ChartJS v4.0.1 and noticed a new option called tension for curving the line chart. However, I'm not satisfied with how it looks.

The tension option ranges from 0 to 1, and I've experimented with different values to enhance the aesthetics of my Chart:

tension: 0.1

https://i.stack.imgur.com/udwsL.png

tension: 0.5

https://i.stack.imgur.com/vjkdR.png

tension: 1

https://i.stack.imgur.com/5pJid.png

My main question is, what steps can I take to make the chart appear more "smooth", similar to this example:

https://i.stack.imgur.com/XkF0E.png

Any input would be greatly appreciated!

javascriptcharts

Answer №1

To achieve a smoother line, consider implementing the cubicInterpolationMode feature. More details can be found in the documentation provided: Line Chart | Chart.js

By incorporating this feature, your line chart will exhibit improved interpolation:

const ctx = document.getElementById('myChart');

new Chart(ctx, {
  type: 'line',
  data: {
    labels: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
    datasets: [{
      label: 'Dataset',
      data: [1, 3, 2, 1, 1, 1, 2, 2, 2, 2],
      cubicInterpolationMode: 'monotone' // <--- APPLY HERE
    }]
  },
  options: {
    scales: {
      y: {
        type: 'category',
        labels: [1, 2, 3]
      }
    }
  }
});
.chart-container {
  position: relative;
  height: 90vh;
}
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d3b0bbb2a1a7fdb9a093e7fde3fde2">[email protected]</a>"></script>

<div class="chart-container">
  <canvas id="myChart"></canvas>
</div>

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