使用ChartJs时条形图未堆叠

Question

我正在尝试使用chartJs创建一个堆叠条形图（垂直或水平）。在遵循了他们的文档并尝试了各种解决方案之后，我仍然无法获得要叠加的值。

const ctx = document.getElementById('chart-canvas').getContext('2d');
const chartCanvas = () => {
   
const chart = new Chart(ctx, {

    type: 'bar',
    // The data for our dataset
    data: {
        labels: ['a', 'b', 'c'],
        datasets: [{
            label: 'some title here',
            data: [49999,20000,35000], 
            backgroundColor: ['rgba(255, 99, 132, .5)','rgba(25, 99, 132, .5)','rgba(255, 9, 12, .5)'],
            borderColor:     ['rgb(255, 99, 132)','rgb(25, 99, 132)','rgb(255, 9, 12)'],
        }]
    },

    // Configuration options go here
    options: {
        scales: {
            xAxes: [{ stacked: true }],
            yAxes: [{ stacked: true }]
        },
        legend: {
            display: false,
        },
        maintainAspectRatio: false,
    }
});
}
chartCanvas()

我创造了一把小提琴https://jsfiddle.net/trig79/oxantepu/1/

感谢任何关于我哪里出错的指导

Answer 1

堆叠选项仅适用于使用多个数据集的情况。您可以将每个堆叠的值放在单独的数据集中，以便堆叠它们。

const ctx = document.getElementById('chart-canvas').getContext('2d');
const chartCanvas = () => {
   
const chart = new Chart(ctx, {

    type: 'bar',
    // The data for our dataset
    data: {
        labels: ['First Data'],
        datasets: [
            {
                label: 'a',
                data: [49999], 
                backgroundColor: ['rgba(255, 99, 132'],
                borderColor:     ['rgb(255, 99, 132)'],
            },
            {
                label: 'b',
                data: [20000], 
                backgroundColor: ['rgba(25, 99, 132, .5)'],
                borderColor:     ['rgb(25, 99, 132)'],
            },
            {
                label: 'c',
                data: [35000], 
                backgroundColor: ['rgba(255, 9, 12, .5)'],
                borderColor:     ['rgb(255, 9, 12)'],
            }
        ]
    },

    // Configuration options go here
    options: {
        scales: {
            xAxes: [{
              stacked: true
            }],
            yAxes: [{
              stacked: true
            }]
          },
        legend: {
            display: false,
        },
        maintainAspectRatio: false,
    }
});
}
chartCanvas()