可以在条形图(chart.js)中合并2个条形图

<canvas id="myChart"></canvas>

var ctx = document.getElementById('myChart').getContext('2d');

var labels = ['标签1', '标签2', '标签3', '标签4', '标签5'];
var data1 = [10, 20, 30, 40, 50];
var data2 = [5, 15, 25, 35, 45];

var config = {
  type: 'bar',
  data: {
    labels: labels,
    datasets: [
      {
        label: '数据集1',
        data: data1,
        backgroundColor: 'rgba(255, 99, 132, 0.5)' // 设置条形图颜色
      },
      {
        label: '数据集2',
        data: data2,
        backgroundColor: 'rgba(54, 162, 235, 0.5)' // 设置条形图颜色
      }
    ]
  },
  options: {
    responsive: true,
    scales: {
      x: {
        stacked: true // 设置横向堆叠条形图
      },
      y: {
        stacked: true // 设置纵向堆叠条形图
      }
    }
  }
};

var myChart = new Chart(ctx, config);