1👍
✅
Step-by-step to resolve this problem:
- Change your Chart.js version to v3.9.1
- Import Utils library from this link and change
Utils
toSamples.utils
- Change Chart.js context to
$("#multiChart")[0].getContext('2d')
. - Make sure you put your
script
tag at the end of the code.
$(document).ready(function () {
var ctx = $("#multiChart")[0].getContext('2d');
const DATA_COUNT=5;
const NUMBER_CFG={ count: DATA_COUNT, min: 0, max: 100 };
const labels=Samples.utils.months({ count: 7 });
const data={
labels: ['Overall Yay', 'Overall Nay', 'Group A Yay', 'Group A Nay', 'Group B Yay', 'Group B Nay', 'Group C Yay', 'Group C Nay'],
datasets: [
{
backgroundColor: ['#AAA', '#777'],
data: [21, 79]
},
{
backgroundColor: ['hsl(0, 100%, 60%)', 'hsl(0, 100%, 35%)'],
data: [33, 67]
},
{
backgroundColor: ['hsl(100, 100%, 60%)', 'hsl(100, 100%, 35%)'],
data: [20, 80]
},
{
backgroundColor: ['hsl(180, 100%, 60%)', 'hsl(180, 100%, 35%)'],
data: [10, 90]
}
]
};
var myChart = new Chart(ctx, {
type: 'pie',
data: data,
options: {
responsive: true,
plugins: {
legend: {
labels: {
generateLabels: function (chart) {
// Get the default label list
const original=Chart.overrides.pie.plugins.legend.labels.generateLabels;
const labelsOriginal=original.call(this, chart);
// Build an array of colors used in the datasets of the chart
let datasetColors=chart.data.datasets.map(function (e) {
return e.backgroundColor;
});
datasetColors=datasetColors.flat();
// Modify the color and hide state of each label
labelsOriginal.forEach(label => {
// There are twice as many labels as there are datasets. This converts the label index into the corresponding dataset index
label.datasetIndex=(label.index-label.index%2)/2;
// The hidden state must match the dataset's hidden state
label.hidden=!chart.isDatasetVisible(label.datasetIndex);
// Change the color to match the dataset
label.fillStyle=datasetColors[label.index];
});
return labelsOriginal;
}
},
onClick: function (mouseEvent, legendItem, legend) {
// toggle the visibility of the dataset from what it currently is
legend.chart.getDatasetMeta(
legendItem.datasetIndex
).hidden=legend.chart.isDatasetVisible(legendItem.datasetIndex);
legend.chart.update();
}
},
tooltip: {
callbacks: {
label: function (context) {
const labelIndex=(context.datasetIndex*2)+context.dataIndex;
return context.chart.data.labels[labelIndex]+': '+context.formattedValue;
}
}
}
}
},
});
});
<div>
<canvas id="multiChart" width="400" height="600"></canvas>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="https://www.chartjs.org/samples/2.9.4/utils.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.9.1/chart.min.js"></script>
Source:stackexchange.com