[Chartjs]-Charts.js – Need to remove the data value from the Tooltip

by

11👍

✅

You can control the label of the tooltip with it’s callback.

If you just want to display the text of the label add this to your options:

tooltips: {
    callbacks: {
        label: function(tooltipItems, data) {  
            return data.labels[tooltipItems.index];
        }
    }
}

By the way: Your snippet is not working because you didn’t include chart.js. I’ve copied your snippet and added my change below:

var canvasP = document.getElementById("pieChart");
var ctxP = canvasP.getContext('2d');
var myPieChart = new Chart(ctxP, {
   type: 'pie',
   data: {
      labels: ["Värde 1", "Värde 2", "Värde 3", "Värde 4", "Värde 5", "Värde 6", "Värde 7"],
      datasets: [{
         data: [1, 5, 10, 20, 50, 70, 50],
         backgroundColor: ["#64B5F6", "#FFD54F", "#2196F3", "#FFC107", "#1976D2", "#FFA000", "#0D47A1"],
         hoverBackgroundColor: ["#B2EBF2", "#FFCCBC", "#4DD0E1", "#FF8A65", "#00BCD4", "#FF5722", "#0097A7"]
      }]
   },
   options: {
      legend: {
         display: true,
         position: "right"
      },
      tooltips: {
        callbacks: {
          label: function(tooltipItems, data) {  
            return data.labels[tooltipItems.index];
          }
        }
      }
   }
});

canvasP.onclick = function(e) {
   var slice = myPieChart.getElementAtEvent(e);
   if (!slice.length) return; // return if not clicked on slice
   var label = slice[0]._model.label;
   switch (label) {
      // add case for each label/slice
      case 'Värde 5':
         alert('clicked on slice 5');
         window.open('www.example.com/foo');
         break;
      case 'Värde 6':
         alert('clicked on slice 6');
         window.open('www.example.com/bar');
         break;
      // add rests ...
   }
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.min.js"></script>
<canvas id="pieChart" width="400" height="400"></canvas>

0👍

In Chart.js 3:

options.tooltips.callbacks has been renamed to options.tooltip.callbacks. To see what’s included in the tootipItems payload, write it to the log.

  tooltip: {
    callbacks: {
      label: function(tooltipItems) {
        console.log(tooltipItems)
        return " " + tooltipItems['label']
      },
    },
  },

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