HTML2Canvas does not render full div, only what is visible on screen?

Question

I\'m trying to use HTML2Canvas to render the contents of a div. Here is the code:

var htmlSource = $(\'#potenzial-page\')[0];

$(\'#btn\').on(\"click\", fun         


        

Answer 1

This is how I've achieved in Reactjs.

Main problem were ratio and scale If you do a quick window.devicePixelRatio, it's default value is 2 which was causing the half image issue.

const printDocument = () => {
  const input = document.getElementById('divToPrint');
  const divHeight = input.clientHeight
  const divWidth = input.clientWidth
  const ratio = divHeight / divWidth;

  html2canvas(input, { scale: '1' }).then((canvas) => {
    const imgData = canvas.toDataURL('image/jpeg');
    const pdfDOC = new jsPDF("l", "mm", "a0"); //  use a4 for smaller page

    const width = pdfDOC.internal.pageSize.getWidth();
    let height = pdfDOC.internal.pageSize.getHeight();
    height = ratio * width;

    pdfDOC.addImage(imgData, 'JPEG', 0, 0, width - 20, height - 10);
    pdfDOC.save('summary.pdf');   //Download the rendered PDF.
  });
}

Answer 2

I hope thet help you

html2canvas(htmlSource, {scrollY: -window.scrollY}).then(function(canvas) {
            var img = canvas.toDataURL();
            window.open(img);
        });

Answer 3

I used window.scrollTo()in my case and it worked for me.

Below is a sample code

$('#btn').on("click", function() { 
    window.scrollTo(0,0);     
    html2canvas(htmlSource).then(function(canvas) {
        var img = canvas.toDataURL();
        window.open(img);
    });
    window.scrollTo(0, document.body.scrollHeight || document.documentElement.scrollHeight);
});

Answer 4

I just did something like this and it worked for me:

html2canvas(document.querySelector("#capture2image"), {
            allowTaint: true,
            useCORS: true,
            logging: false,
            height: window.outerHeight + window.innerHeight,
            windowHeight: window.outerHeight + window.innerHeight, 

Answer 5

  window.scrollTo(0,0);  

Add this works for me.

Answer 6

If you have a height set to the div you want to turn to a canvas - you need to remove that before actually taking the snapshot. Otherwise it will just cut it off because of that height.

 $(".yourElemThatHasSomeHeightSet").css("height", "");

Then you will notice that scrolling down - will still cut your document. Simply do a:

$("html, body").scrollTop(0);

before taking the snapshot.