https://www.medimpact.com/themes/custom/mi/js/article.js?v=2.2.1

1(function renderPdfs($, Drupal) {
2  'use strict';
3  Drupal.behaviors.renderPdfs = {
4    attach: function (context, settings) {
5
6      var downPdf = document.getElementById('renderPdf');
7      if (downPdf) {
8        downPdf.onclick = function () {
9          html2canvas(document.body, {
10            onrendered: function (canvas) {
11              var contentWidth = canvas.width;
12              var contentHeight = canvas.height;
13              var pageHeight = contentWidth / 595.28 * 841.89;
14              var leftHeight = contentHeight;
15              var position = 0;
16              var imgWidth = 555.28;
17              var imgHeight = 555.28 / contentWidth * contentHeight;
18              var pageData = canvas.toDataURL('image/jpeg', 1.0);
19              var pdf = new jsPDF('', 'pt', 'a4');
20              if (leftHeight < pageHeight) {
21                pdf.addImage(pageData, 'JPEG', 20, 0, imgWidth, imgHeight);
22              }
23              else {
24                while (leftHeight > 0) {
25                  pdf.addImage(pageData, 'JPEG', 20, position, imgWidth, imgHeight);
26                  leftHeight -= pageHeight;
27                  position -= 841.89;
28                  if (leftHeight > 0) {
29                    pdf.addPage();
30                  }
31                }
32              }
33              pdf.deletePage(5);
34              pdf.deletePage(4);
35              pdf.deletePage(3);
36              pdf.deletePage(2);
37              pdf.save(document.title + '.pdf');
38            }
39          });
40        };
41      }
42
43    }
44  };
45})(jQuery, Drupal);