Chart.js not height responsive

user_8411890 0
Viewed 13002

I have issues to get the chart.js line chart to be responsive on the height as well as the width.

See example what it should be working like:

Here is my code:

  var randomScalingFactor = function(){ return Math.round(Math.random()*100)};
  var lineChartData = {
    labels : ['January','February','March','April','May','June','July'],
    datasets : [
      {
        label: 'My First dataset',
        labelColor : '#fff',
        fontColor : '#fff' ,
        backgroundColor : 'rgba(220,220,220,0.2)',
        borderColor : 'rgba(220,220,220,1)',
        pointBackgroundColor : 'rgba(220,220,220,1)',
        pointBorderColor : '#fff',
        data : [randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor()]
      }
    ]
  }

  var options = {
    maintainAspectRatio: false,
    legend: {
      display: false,
    },
    scales: {
      xAxes: [{
        gridLines: {
         display: false,
         color: '#03A5C5',
         lineWidth: 8,
         },
        ticks: {
          fontColor: "white",
        },
      }],
      yAxes: [{
        gridLines: {
         display: false,
         color: '#03A5C5',
         lineWidth: 8,
         },
        ticks: {
          fontColor: "white",
          beginAtZero: true,
        }
      }]
    }
  };
  var ctx = document.getElementById('canvas-1');
  var chart = new Chart(ctx, {
    responsive: true,
    type: 'line',
    data: lineChartData,
    options: options
  });
chart.js charts javascript
3 Answers
  1. Create Class
.chart-container {
    position: relative;
    margin: auto;
    height: 80vh;
    width: 80vw;
}
  1. Create Div With class chart-container and place canvas tag inside it.
<div class="chart-container">
  <canvas id="canvas"></canvas>
</div>
  1. Chart options, use property maintainAspectRatio set to false:
options: {
    maintainAspectRatio: false,
    responsive: true,  
    ...
}
user_55548270

You can have it responsive and set a different aspect ratio. My issue was that the chart tend to be squeezed on mobile device taking barely no height.

To remedy, with chart.js 3.2.1, I am using the AspectRatio option:

options: {          
   aspectRatio: 1, 
}

This way the chart is square and stay square, you can play with this number usually between 0.5 to 2 to find a ratio that suits you on both displays.

user_77479420
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