Chartjs-Chart.js no data displayed with predefined units

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You will need to use a category scale for this:

const options = {
  type: 'bar',
  data: {
    labels: ["val1", "val2", "val3"],
    datasets: [{
      label: '# of Votes',
      data: ['6.84KB/s', '4.49KB/s', '3.42KB/s'],
      backgroundColor: 'pink'
    }]
  },
  options: {
    scales: {
      y: {
        type: 'category',
        labels: ['6.84KB/s', '4.49KB/s', '3.42KB/s'],
        reverse: true
      }
    }
  }
}

const 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/3.8.2/chart.js"></script>
</body>

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