Stacked Bar Chart with Groups
Using the stack property to divide datasets into multiple stacks.

Randomize
config setup actions
const config = {type: 'bar',data: data,options: {plugins: {title: {display: true,text: 'Chart.js Bar Chart - Stacked'},},responsive: true,interaction: {intersect: false,},scales: {x: {stacked: true,},y: {stacked: true}}}};
const DATA_COUNT = 7;const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100};const labels = Utils.months({count: 7});const data = {labels: labels,datasets: [{label: 'Dataset 1',data: Utils.numbers(NUMBER_CFG),backgroundColor: Utils.CHART_COLORS.red,stack: 'Stack 0',},{label: 'Dataset 2',data: Utils.numbers(NUMBER_CFG),backgroundColor: Utils.CHART_COLORS.blue,stack: 'Stack 0',},{label: 'Dataset 3',data: Utils.numbers(NUMBER_CFG),backgroundColor: Utils.CHART_COLORS.green,stack: 'Stack 1',},]};
const actions = [{name: 'Randomize',handler(chart) {chart.data.datasets.forEach(dataset => {dataset.data = Utils.numbers({count: chart.data.labels.length, min: -100, max: 100});});chart.update();}},];