const html_source = document.getElementById('contentID');   // Get html

 html2canvas(html_source).then(function(canvas) { // Convert to canvas

   let imgData = canvas.toDataURL('image/png'); // Generates image that you can store

   let pdf = new jsPDF('p', 'mm', 'a4'); //Create PDF, Note that you use the same image to create the PDF
   pdf.addImage(imgData, 'PNG', 10, 10);
   pdf.save('test.pdf');
 })