JsPDF - Not allowed to navigate top frame to data URL

Maybe can help, create a function to export with the download attribute html5:

var docPdf = doc.output();
exportToFile(docPdf,defaults.type);

function exportToFile(data,type){

    var hiddenElement = document.createElement('a');
    hiddenElement.href = 'data:text/'+type+';filename='+'exportar.'+type+';'+'charset=utf-8,' + encodeURI(data);
    hiddenElement.target = '_blank';
    hiddenElement.download = 'exportar.'+type;
    hiddenElement.click();
}

the download property of the a element has to contain a file name.

function window_download( datauri )
{
  const match = datauri.match(/(filename=)([^;]+)/);
  const fileName = match ? match[2] : '' ;
  if ( fileName )
  {
    const downloadLink = document.createElement("a");
    downloadLink.download = fileName;
    downloadLink.innerHTML = "Download File";
    downloadLink.href = datauri ;
    downloadLink.click();
  }
else
{
throw 'missing download file name' ;
}

   // get contents of pdf from jsPDF as a data uri.
    const uri = pdf.output('datauristring', 'packing-list.pdf' );
    window_download( uri ) ;

As chrome removed its support for - Top-frame navigation. Luckily jsPDF has an API - "save()", which offers the same functionality as doc.output('datauri')

Below is the example implementation of save()

var doc = new jsPDF();
doc.addImage(imgData, 'JPEG', 0, 0, 300, 160);    
doc.save('fileName.pdf');

save(filename, options) → {jsPDF|Promise}

Saves as PDF document. An alias of jsPDF.output('save', 'filename.pdf'). Uses FileSaver.js-method saveAs. Refer JSPDF documentation for more information -

/**
 * Creates an anchor element `<a></a>` with
 * the base64 pdf source and a filename with the
 * HTML5 `download` attribute then clicks on it.
 * @param  {string} pdf 
 * @return {void}     
 */
function downloadPDF(pdf) {
    const linkSource = `data:application/pdf;base64,${pdf}`;
    const downloadLink = document.createElement("a");
    const fileName = "vct_illustration.pdf";

    downloadLink.href = linkSource;
    downloadLink.download = fileName;
    downloadLink.click();
}

Source from: https://medium.com/octopus-labs-london/downloading-a-base-64-pdf-from-an-api-request-in-javascript-6b4c603515eb

Add attrbute download

<a href="data:image/jpg;base64,/AA/AABBCCDD..." download="name.jpg"></a>

Using download="" made me able to download the file

In angular2+ -

app.component.html -

 <object id="obj"  [attr.data]  type="application/pdf"> </object>

app.component.ts

 document.getElementById('obj').dataset.data = doc.output("datauristring");

  var blob = doc.output("blob");
  window.open(URL.createObjectURL(blob));