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Turns out there is a stacked property you can use on the datasets and you don’t need multiple axes
var barChartData = {
labels: ["January", "February"],
datasets: [{
data: [10, 20],
label: '2021',
backgroundColor: "#ffe100",
stack: 'stack 1',
}, {
data: [15, 30],
label: '2021 Total',
backgroundColor: "#ee0000",
stack: 'stack 1',
}, {
data: [6, 19],
label: '2022 YTD',
backgroundColor: "#555555",
stack: 'stack 2',
}]
};
var ctx = document.getElementById("canvas").getContext("2d");
window.myBar = new Chart(ctx, {
type: 'bar',
data: barChartData,
options: {
title: {
display: true,
text: "Chart.js Bar Chart - Stacked"
},
tooltips: {
mode: 'label'
},
responsive: true,
scales: {
xAxes: [{
stacked: true,
}],
yAxes: [{
stacked: true,
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.bundle.js"></script>
<div style="width: 100%">
<canvas id="canvas"></canvas>
</div>
Source:stackexchange.com