JSPDF .html() function returning blank pdf page - pdf

Question

Using the new jsPDF .html() pretty much pulled straight from their docs, but it still results in a blank page:
Results in blank page:
function saveDoc() {
window.html2canvas = html2canvas
const doc = document.getElementById('doc')
if (doc) {
var pdf = new jsPDF('p', 'pt', 'a4')
pdf.html(doc.innerHTML, {
callback: function (pdf) {
pdf.save('DOC.pdf');
}
})
}
}
Results in no PDF generated:
function saveDoc() {
window.html2canvas = html2canvas
const doc = document.getElementById('doc')
if (doc) {
var pdf = new jsPDF('p', 'pt', 'a4')
pdf.html(doc.innerHTML, {
function (pdf) {
pdf.save('DOC.pdf');
}
})
}
}
Also results in blank page:
function saveDoc() {
window.html2canvas = html2canvas
const doc = document.getElementById('doc')
if (doc) {
var pdf = new jsPDF('p', 'pt', 'a4')
pdf.html(doc, {
callback: function (pdf) {
pdf.save('DOC.pdf');
}
})
}
}
Will use another tool if there are any other suggestions. Need it to be secure and generate selectable text PDF to keep overall size down. It's a long document it's generating and when doing it via addImage() the resulting file is huge. Thoughts?

Answer 1

After trying whole day came with following solution. I think we are getting blank page because of versions of html2canvas. I was using updated jspdf(1.5.3) with html2canvas(1.0.0-rc.3). Due to this I was getting blank pdf. When I use html2canvas(1.0.0-alpha.12) with jspdf(1.5.3) I am getting pdf with contents(not blank). So better to change version of html2canvas in order to work with newly .html() method.
// scripts included
<script type="text/javascript" src="html2canvas.js"></script> // 1.0.0-alpha.12 downloaded
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js" integrity="sha384-NaWTHo/8YCBYJ59830LTz/P4aQZK1sS0SneOgAvhsIl3zBu8r9RevNg5lHCHAuQ/" crossorigin="anonymous"></script>
//html
<div id='doc'>
<p>Hello world</p>
<div class="first-page">
<h1>bond</h1>
<img src="1.png"/>
</div>
<div class="second-page">
<img src="2.png"/>
</div>
</div>
<button onclick="saveDoc()">click</button>
// javascript
<script type="text/javascript">
var pdf = new jsPDF('p', 'pt', 'a4');
function saveDoc() {
window.html2canvas = html2canvas
const doc = document.getElementsByTagName('div')[0];
if (doc) {
console.log("div is ");
console.log(doc);
console.log("hellowww");
pdf.html(document.getElementById('doc'), {
callback: function (pdf) {
pdf.save('DOC.pdf');
}
})
}
}
</script>
html2canvas 1.0.0 alpha.12
.html() not working github

Answer 2

For me the working solution was to add the callback/promise behavior --- pdf.html(doc).then(() => pdf.save('fileName.pdf')); Seems that html() method works async and the file to be downloaded was not ready when downloading based on the other example --- that's why it was empty.