Range grouping data and label in Chartjs

by

👍:0

You can use the tick callback to filter out ticks:

var options = {
  type: 'bar',
  data: {
    labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange", "Red", "Blue", "Yellow", "Green", "Purple", "Orange", "Red", "Blue", "Yellow", "Green", "Purple", "Orange", "Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
    datasets: [{
        label: '# of Votes',
        data: [12, 19, 3, 5, 2, 3, 12, 19, 3, 5, 2, 3, 12, 19, 3, 5, 2, 3, 12, 19, 3, 5, 2, 3],
        backgroundColor: 'pink'
      },
      {
        label: '# of Points',
        data: [7, 11, 5, 8, 3, 7, 7, 11, 5, 8, 3, 7, 7, 11, 5, 8, 3, 7, 7, 11, 5, 8, 3, 7],
        backgroundColor: 'lime'
      }
    ]
  },
  options: {
    scales: {
      x: {
        ticks: {
          callback: function(value, index, values) {
            let skips = values.length / 6;

            return index % skips === 0 ? this.getLabelForValue(value) : ''
          }
        }
      }
    }
  }
}

var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
  <canvas id="chartJSContainer" width="600" height="400"></canvas>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.0/chart.js"></script>
</body>

Leave a comment