Open jsPDF created pdf in Chrome's new tab/win

2020-07-27 06:12发布

站内问答 / JavaScript
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How can I open with javascript link data:application/pdf;filename=generated.pdf;base64;DATA in Chrome 71?
Link from console opened successfully, but not from code - unfortunately.
The snippet does not work for security reason. Only for code demonstration.
I read some similar questions, but did not find an answer.

enter image description here

var button = document.getElementById("button");

button.addEventListener("click", generate, false);

function generate() {

  var doc = new jsPDF({
    orientation: "l",
    unit: "mm"
  });

  doc.text('ACT', 130, 20);
  var string = doc.output('datauristring');
  console.log(string);
  var link = document.createElement('a');
  link.href = string;
  link.setAttribute('target', '_blank');
document.body.appendChild(link);
  link.click();
  link.parentNode.removeChild(link);
}
<script src="https://unpkg.com/jspdf@1.5.3/dist/jspdf.min.js"></script>
<button id="button">Generate pdf table</button>

5条回答
唯我独甜
2楼-- · 2020-07-27 06:27

It's actually very easy, don't complicate things..

window.open(URL.createObjectURL(doc.output("blob")))

or a more verbose and less efficient version:

let newWindow = window.open('/');
fetch(doc.output('datauristring')).then(res => res.blob()).then(blob => {
    newWindow.location = URL.createObjectURL(blob);
})

(You need to open the new window immediately after the onclick or Chrome will block the popup. This solution is not as good because there is an unnecessary conversion from datauri to blob)

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做自己的国王
3楼-- · 2020-07-27 06:27

You're generating a PDF from its raw data using Javascript. Why not use a reader like Adobe to render it? That is what is happening when you are clicking the link from the console. You could literally just open the link and it will open as a PDF. I think you are possibly over complicating this task.

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唯我独甜
4楼-- · 2020-07-27 06:32

I run code from the question in the local machine and take this error:

Not allowed to navigate top frame to data URL: data:application/pdf;filename=generated.pdf;base64,...

JsPDF - Not allowed to navigate top frame to data URL

I tried the suggestion @WeihuiGuo. Unfortunately for me.

I found than Chrome automaticaly open pdf.

https://support.google.com/chrome/answer/6213030?hl=en
https://groups.google.com/a/chromium.org/forum/#!topic/chromium-bugs/z5hA0H6LFws

And not only for the new tab. Not opened on the current page too.
https://sphilee.github.io/jsPDF-CustomFonts-support/

In other browsers this page display correctly.

Such sad news.

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来，给爷笑一个
5楼-- · 2020-07-27 06:37

Try window.open() instead. The following code worked for me. You will need to modify the window/page size.

let dataSrc = pdf.output("datauristring");
let win = window.open("", "myWindow");
win.document.write("<html><head><title>jsPDF</title></head><body><embed src=" + 
    dataSrc + "></embed></body></html>");

Update:

Didn't realize that jsPDF comes with a built-in method pdf.output('dataurlnewwindow');, which uses iframe,

The downside of pdf.output('dataurlnewwindow') is that it opens a new tab/window with datauristring as the pdf file name and the download button doesn't work, while window.open(pdf.output('bloburl')) seems fine with the download button.

Okay, pdf file can be renamed like this: 

pdf.setProperties({
    title: "jsPDF sample"
});

Update 2:

To avoid the page being cut off when a page is zoomed, you can set the html2canvas scale accordingly.

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▲ chillily
6楼-- · 2020-07-27 06:39

This code works for me

  var doc = new jsPDF();
  doc.setProperties({
  title: "new Report"
  });
  doc.output('dataurlnewwindow');
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