jsPDF multi page PDF with HTML renderer

Question

I am using jsPDF in my site to generate PDFs. But now I have multiple DIVs to print in a single PDF. which may take 2 to 3 pages.

For example:

<div id="part1">
  content
</div>

<div id="part2">
  content
</div>

<div id="part2">
   content
</div>

my JS code

• This works but not as I expected, It add a part of the content(which cannot be included in more than one page).
• It removes html tags like br, h1 etc.

    function formtoPDF() {
      jsPDF.API.mymethod = function() {
        // 'this' will be ref to internal API object. see jsPDF source
        // , so you can refer to built-in methods like so:
        //   this.line(....)
        //   this.text(....)
      };
      var doc = new jsPDF();
      doc.mymethod();
      var pdfPart1 = jQuery('#genPDFpart1');
      var pdfPart2 = jQuery(".ltinerary");
      var pdfPart3 = jQuery("#domElementHTML");
      var specialElementHandlers = {
        '#loadVar': function(element, renderer) {
          return true;
        }
      };
      doc.fromHTML(pdfPart1.html() + pdfPart3.html() + pdfPart3.html(), 15, 15, {
        'width': 170,
        'elementHandlers': specialElementHandlers
      });
      doc.output('save', 'Download.pdf');
    }

Can I have a solution for this. Thanks in advance pals .

Answer 1

I have the same working issue. Searching in MrRio github I found this: https://github.com/MrRio/jsPDF/issues/101

Basically, you have to check the actual page size always before adding new content

doc = new jsPdf();
...
pageHeight= doc.internal.pageSize.height;

// Before adding new content
y = 500 // Height position of new content
if (y >= pageHeight)
{
  doc.addPage();
  y = 0 // Restart height position
}
doc.text(x, y, "value");

Answer 2

here's an example using html2canvas & jspdf, although how you generate the canvas doesn't matter--we're just going to use the height of that as the breakpoint on a for loop, in which a new page is created and content added to it.

after the for loop, the pdf is saved.

function makePDF() {

   var quotes = document.getElementById('container-fluid');
   html2canvas(quotes).then((canvas) => {
        //! MAKE YOUR PDF
        var pdf = new jsPDF('p', 'pt', 'letter');

        for (var i = 0; i <= quotes.clientHeight/980; i++) {
            //! This is all just html2canvas stuff
            var srcImg  = canvas;
            var sX      = 0;
            var sY      = 980*i; // start 980 pixels down for every new page
            var sWidth  = 900;
            var sHeight = 980;
            var dX      = 0;
            var dY      = 0;
            var dWidth  = 900;
            var dHeight = 980;

            window.onePageCanvas = document.createElement("canvas");
            onePageCanvas.setAttribute('width', 900);
            onePageCanvas.setAttribute('height', 980);
            var ctx = onePageCanvas.getContext('2d');
            // details on this usage of this function: 
            // https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Using_images#Slicing
            ctx.drawImage(srcImg,sX,sY,sWidth,sHeight,dX,dY,dWidth,dHeight);

            // document.body.appendChild(canvas);
            var canvasDataURL = onePageCanvas.toDataURL("image/png", 1.0);

            var width         = onePageCanvas.width;
            var height        = onePageCanvas.clientHeight;

            //! If we're on anything other than the first page,
            // add another page
            if (i > 0) {
                pdf.addPage(612, 791); //8.5" x 11" in pts (in*72)
            }
            //! now we declare that we're working on that page
            pdf.setPage(i+1);
            //! now we add content to that page!
            pdf.addImage(canvasDataURL, 'PNG', 20, 40, (width*.62), (height*.62));

        }
        //! after the for loop is finished running, we save the pdf.
        pdf.save('Test.pdf');
  });
}