How to set image to fit width of the page using jsPDF?

Question

Is there any way to solve this? I tried to set width and height in mm. How can I set it to full-width?

Answer 1

My answer deals with a more specific case of what you are asking but I think one could draw some ideas from this to apply more generally. Also, I would post this as a comment to Purushoth's answer (on which mine is based), if only I could.

Ok, so my problem was how to fit a web page into the pdf document, without losing the aspect ratio. I used jsPDF in conjuction with html2canvas and I calculated the ratio from my div's width and height. I applied that same ratio to the pdf document and the page fit perfectly onto the page without any distortion.

var divHeight = $('#div_id').height();
var divWidth = $('#div_id').width();
var ratio = divHeight / divWidth;
html2canvas(document.getElementById("div_id"), {
     height: divHeight,
     width: divWidth,
     onrendered: function(canvas) {
          var image = canvas.toDataURL("image/jpeg");
          var doc = new jsPDF(); // using defaults: orientation=portrait, unit=mm, size=A4
          var width = doc.internal.pageSize.getWidth();    
          var height = doc.internal.pageSize.getHeight();
          height = ratio * width;
          doc.addImage(image, 'JPEG', 0, 0, width-20, height-10);
          doc.save('myPage.pdf'); //Download the rendered PDF.
     }
});