chartjs max-min on yaxis

by tbarmann

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>
<canvas id="ctx"></canvas>

JavaScript

var dataArr = [1816.28, 1703.50, 2053.93, 1790.69];
var chart = new Chart(ctx, {
   type: 'line',
   data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr'],
      datasets: [{
         label: 'LINE',
         data: dataArr,
         backgroundColor: 'rgba(0, 119, 290, 0.2)',
         borderColor: 'rgba(0, 119, 290, 0.6)',
         fill: false,
         tension: 0
      }]
   },
   options: {
      scales: {
         yAxes: [{
            ticks: {
               callback: function(value, index, values) {
                  if (index === values.length - 1) return Math.min.apply(this, dataArr);
                  else if (index === 0) return Math.max.apply(this, dataArr);
                  else return '';
               },
               min: Math.min.apply(this, dataArr),
               max: Math.max.apply(this, dataArr)
            }
         }]
      }
   }
});