Chartjs - Doughnut chart with multi layer and running value - charts

Question

I have doughnut chart using chartsjs, and also I used multi layer with cutoutPercentage.
The First Layer (Black color) is the Total and the second layer (Red Color) complete is the running value.
type: 'doughnut',
data: {
datasets: [
{
data: Total,
fill: true,
backgroundColor:'rbg(242, 133, 0)',
borderWidth: 3,
weight:1,
},{
data: complete,
fill: true,
backgroundColor:'rgb(255,36,0)',
borderWidth: 3,
weight:1,
}
]
},
options: {
responsive: true,
rotation: 1 * Math.PI,
circumference: 1 * Math.PI,
legend: {
display: false
},
tooltip: {
enabled: false
},
cutoutPercentage: 70,
},
This is what I need,2nd layer is running until reach the total.

Answer 1

In case you need a generic solution, you can use the Plugin Core API and define a beforeInit hook that modifies the chart configuration to fit your needs.
Please take a look at below runnable code and see how it could be done.
new Chart('runningValue', {
type: 'doughnut',
plugins: [{
beforeInit: chart => {
chart.data.datasets = [{
data: [chart.data.total],
backgroundColor: chart.data.totalColor,
borderWidth: 3
},
{
data: [chart.data.complete, chart.data.total - chart.data.complete],
backgroundColor: [chart.data.completeColor, '#fff'],
borderWidth: 3
}
]
}
}],
data: {
total: 50,
complete: 35,
totalColor: 'rbg(242, 133, 0)',
completeColor: 'rgb(255,36,0)'
},
options: {
rotation: -90,
circumference: 180,
plugins: {
legend: {
display: false
},
tooltip: {
enabled: false
}
},
cutout: '70%'
}
});
canvas {
max-height: 100px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.js"></script>
<canvas id="runningValue"></canvas>

Answer 2

Simply define two values and two background colors on the second dataset as shown in the runnable code below.
const total = 50;
const complete = 35;
new Chart('runningValue', {
type: 'doughnut',
data: {
datasets: [{
data: [total],
backgroundColor: 'rbg(242, 133, 0)',
borderWidth: 3
},
{
data: [complete, total - complete],
backgroundColor: ['rgb(255,36,0)', '#fff'],
borderWidth: 3
}
]
},
options: {
rotation: -90,
circumference: 180,
plugins: {
legend: {
display: false
},
tooltip: {
enabled: false
}
},
cutout: '70%'
}
});
canvas {
max-height: 100px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.js"></script>
<canvas id="runningValue"></canvas>