Here's how to make a PDF with DocRaptor that contains a Highchart:

<html>
  <!-- One of many ways to make sure the chart fits on the page -->
  <style type="text/css">
    @page {
      prince-shrink-to-fit: auto; /* sizes entire document to contents of first page*/
    }
  </style>

  <body>    
    <script src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
    <script src="https://code.highcharts.com/highcharts.js"></script>
    <script src="https://code.highcharts.com/modules/exporting.js"></script>

    <!-- Highcharts demo code taken from http://www.highcharts.com/demo/line-labels -->
    <script>
      $(function () {
          $('#container').highcharts({
              chart: {
                  type: 'line'
              },
              title: {
                  text: 'Monthly Average Temperature'
              },
              subtitle: {
                  text: 'Source: WorldClimate.com'
              },
              xAxis: {
                  categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
              },
              yAxis: {
                  title: {
                      text: 'Temperature (°C)'
                  }
              },
              plotOptions: {
                  line: {
                      dataLabels: {
                          enabled: true
                      },
                      enableMouseTracking: false
                  }
              },
              series: [{
                  name: 'Tokyo',
                  data: [7.0, 6.9, 9.5, 14.5, 18.4, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6]
              }, {
                  name: 'London',
                  data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 16.6, 14.2, 10.3, 6.6, 4.8]
              }]
          });
      });
    </script>

    <!-- Highcharts often waits long enough that DocRaptor thinks the javascript is finished -->
    <!-- when it is not. -->
    <!-- This function tells the DocRaptor javascript engine to wait 3 seconds before finishing. -->
    <!-- https://docraptor.com/documentation/api#api_javascript -->
    <script>
      var didWait = false;
      // DocRaptor polls docraptorJavaScriptFinished until it is true
      docraptorJavaScriptFinished = function() {
        if (! didWait) {
          setTimeout(function(){
            didWait = true;
          }, 3000);
          return false;
        }
        return true;
      }
    </script>

    <!-- Container for chart -->
    <div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
  </body>
</html>
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