score:3

You can set the stacked property on bar datasets, so lines don't stack. Try something like this:

 data: {
      datasets: [{
        label: 'Line 1',
        data: [],
        backgroundColor: '#3788d8cc',
        borderColor: '#3788d8cc',
        fill: false
      }, {
        label: 'Stacked bar 1',
        data: [],
        backgroundColor: '#e51c23',
        borderColor: '#e51c23',
        type: 'bar',
        stack: 'bar-stacked'
      }, {
        label: 'Line 2',
        data: [],
        backgroundColor: '#ff9800',
        borderColor: '#ff9800',
        fill: false
      },
      {
        label: 'Stacked bar 2',
        data: [],
        type: 'bar',
        backgroundColor: '#3f51b5',
        borderColor: '#3f51b5',
        stack: 'bar-stacked'
      }],
      labels: [],
    },
    options: {
      maintainAspectRatio: false,
      legend: {
        display: true
      },
      scales: {
        xAxes: [{
          display: true
        }],
        yAxes: [{
          display: true
        }]
      }
    }

score:4

Another answer here - you can set a 'stack' identifier for the data you want to be cumulative (i.e. just the bars), and turn off 'fill' on the line graphs to draw just as a line rather than mountain range

Chart.js remove stacking

score:21

You can get this functionality with a combination of setting a different yAxisID (e.g. yAxisID: "bar-stacked") to each of your datasets, and then adding a second options.scales.yAxes object. So you would have this as a dataset:

{
  label: 'Promoters',
  backgroundColor: "#aad700",
  yAxisID: "bar-stacked",
  data: [
    50, 44, 52, 62, 48, 58, 59, 50, 51, 52, 53, 54
  ]
}

and then you would add an additional yAxes (the first one will be the collection of your line datasets [no yAxisId in the example below], the second will be all of the bars you want stacked):

yAxes: [{
  stacked: false,
  ticks: {
    beginAtZero: true,
    min: 0,
    max: 100
  }
}, {
  id: "bar-stacked",
  stacked: true,
  display: false, //optional if both yAxes use the same scale
  ticks: {
    beginAtZero: true,
    min: 0,
    max: 100
  },
  type: 'linear'
}]

Full example is as follows:

<!doctype html>
<html>

<head>
  <title>Stacked Bar Chart</title>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.3/Chart.bundle.js"></script>
  <style>
    canvas {
      -moz-user-select: none;
      -webkit-user-select: none;
      -ms-user-select: none;
    }
  </style>
</head>

<body>
  <div style="width: 100%">
    <canvas id="canvas"></canvas>
  </div>
  <script>
    var barChartData = {
      labels: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
      datasets: [{
        data: [
          50, 30, 60, 70, 80, 90, 95, 70, 90, 20, 60, 95
        ],
        type: 'line',
        label: 'This Year',
        fill: false,
        backgroundColor: "#fff",
        borderColor: "#70cbf4",
        borderCapStyle: 'butt',
        borderDash: [],
        borderDashOffset: 0.0,
        borderJoinStyle: 'miter',
        lineTension: 0.3,
        pointBackgroundColor: "#fff",
        pointBorderColor: "#70cbf4",
        pointBorderWidth: 1,
        pointHoverRadius: 5,
        pointHoverBackgroundColor: "#70cbf4",
        pointHoverBorderColor: "#70cbf4",
        pointHoverBorderWidth: 2,
        pointRadius: 4,
        pointHitRadius: 10
      }, {
        data: [
          25, 40, 30, 70, 60, 50, 40, 70, 40, 80, 30, 90
        ],
        type: 'line',
        label: 'Last Year',
        fill: false,
        backgroundColor: "#fff",
        borderColor: "#737373",
        borderCapStyle: 'butt',
        borderDash: [10, 10],
        borderDashOffset: 0.0,
        borderJoinStyle: 'miter',
        lineTension: .3,
        pointBackgroundColor: "#fff",
        pointBorderColor: "#737373",
        pointBorderWidth: 1,
        pointHoverRadius: 5,
        pointHoverBackgroundColor: "#737373",
        pointHoverBorderColor: "#737373",
        pointHoverBorderWidth: 2,
        pointRadius: 4,
        pointHitRadius: 10
      }, {
        label: 'Promoters',
        backgroundColor: "#aad700",
        yAxisID: "bar-y-axis",
        data: [
          50, 44, 52, 62, 48, 58, 59, 50, 51, 52, 53, 54
        ]
      }, {
        label: 'Passives',
        backgroundColor: "#ffe100",
        yAxisID: "bar-y-axis",
        data: [
          20, 21, 24, 25, 26, 17, 28, 19, 20, 11, 22, 33
        ]
      }, {
        label: 'Detractors',
        backgroundColor: "#ef0000",
        yAxisID: "bar-y-axis",
        data: [
          30, 35, 24, 13, 26, 25, 13, 31, 29, 37, 25, 13
        ]
      }]
    };

    window.onload = function() {
      var ctx = document.getElementById("canvas").getContext("2d");
      window.myBar = new Chart(ctx, {
        type: 'bar',
        data: barChartData,
        options: {
          title: {
            display: true,
            text: "Chart.js Bar Chart - Stacked"
          },
          tooltips: {
            mode: 'label'
          },
          responsive: true,
          scales: {
            xAxes: [{
              stacked: true,
            }],
            yAxes: [{
              stacked: false,
              ticks: {
                beginAtZero: true,
                min: 0,
                max: 100
              }
            }, {
              id: "bar-y-axis",
              stacked: true,
              display: false, //optional
              ticks: {
                beginAtZero: true,
                min: 0,
                max: 100
              },
              type: 'linear'
            }]
          }
        }
      });
    };
  </script>
</body>

</html>


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