그래프위에 값표시하기

    <script src="./js/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.bundle.js"></script>
    <script type="text/javascript">
    Chart.plugins.register({
      afterDatasetsDraw: function(chart) {
        var ctx = chart.ctx;
        chart.data.datasets.forEach(function(dataset, i) {
          var meta = chart.getDatasetMeta(i);
          if (!meta.hidden) {
            meta.data.forEach(function(element, index) {
              // Draw the text in black, with the specified font
              ctx.fillStyle = 'rgb(255, 0, 0)';
              var fontSize = 15;
              var fontStyle = 'normal';
              var fontFamily = 'Helvetica Neue';
              ctx.font = Chart.helpers.fontString(fontSize, fontStyle, fontFamily);
              // Just naively convert to string for now
              var dataString = dataset.data[index].toString();
              // Make sure alignment settings are correct
              ctx.textAlign = 'center';
              ctx.textBaseline = 'middle';
              var padding = 5;
              var position = element.tooltipPosition();
              ctx.fillText(dataString, position.x, position.y - (fontSize / 2) - padding);
            });
          }
        });
      }
    });
 
    </script>