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You’ll find an example on ChartJS’s site. If you open the source (Ctrl+U), you’ll see how they declare the options. Something along these lines:
const data = [{someID:"1111",otherID:"9999",name:"SomeName",aTotal:"32",bTotal:"16000",cTotal:"800",rank:"1",lastactivity:"44 h",timestamp:"0"},{someID:"01234",otherID:"9876",name:"SomeName",aTotal:"63",bTotal:"2300",cTotal:"950",rank:"2",lastactivity:"12.11.",timestamp:"0"}];
const ctx = document.getElementById("myChart").getContext("2d");
const cfg = {
type: "bar",
data: {
labels: data.map(({someID, name}) => `${name} (${someID})`),
datasets: [{
label: 'aTotal',
backgroundColor: 'rgba(255, 99, 132, 0.5)',
data: data.map(({aTotal}) => aTotal),
},
{
label: 'bTotal',
backgroundColor: 'rgba(54, 162, 235, 0.5)',
data: data.map(({bTotal}) => bTotal),
},
{
label: 'cTotal',
backgroundColor: 'rgba(75, 192, 192, 0.5)',
data: data.map(({cTotal}) => cTotal),
},
],
},
};
const myChart = new Chart(ctx, cfg);
<script src="https://cdn.jsdelivr.net/npm/chart.js@2.9.4"></script>
<canvas id="myChart" width="400" height="110"></canvas>
Source:stackexchange.com