How to Hide Decimal Points on Numbers on the Y-Axis in Chart.js?

To hide decimal points on numbers on the y-axis in Chart.js, we can set the stepSize option.

For instance, we can write the following HTML:

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<canvas id="myChart"></canvas>

to add the Chart.js script and the canvas for the chart.

Then we write:

const ctx = document.getElementById('myChart').getContext('2d');
const myChart = new Chart(ctx, {
  type: 'bar',
  data: {
    labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
    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: {
    scales: {
      y: {
        ticks: {
          stepSize: 1,
          beginAtZero: true,
        },
      },
    },
  }
});

to create the chart.

We set the options.scales.y.ticks.stepSize property to 1 so the numbers on the y-axis will always be integers with no trailing decimal.