[Chartjs]-How could I put a string for the points on the x-axis?

by

1👍

✅

You can use the title callback for this:

var options = {
  type: 'line',
  data: {
    labels: ["10", "15", "30", "80", "5000", "999999"],
    datasets: [{
        label: '# of Votes',
        data: [12, 19, 3, 5, 2, 3],
        borderWidth: 1
      },
      {
        label: '# of Points',
        data: [7, 11, 5, 8, 3, 7],
        borderWidth: 1
      }
    ]
  },
  options: {
    tooltips: {
      callbacks: {
        title: (a) => ('Test string: ' + a[0].label)
      }
    }
  }
}

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/2.9.4/Chart.js"></script>
</body>

0👍

I solved using this way, more easy.

options: {
            tooltips: {
              callbacks: {
                title:function(tooltipItems, data){
                     return 'Y: ' + tooltipItems[0].xLabel;
                } 
              }
            }
          }

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