https://www.ubo.cl/wp-content/plugins/ht-qrcode-generator/assets/js/qrcode-custom.js?ver=2.3.7

1//QR Code Download 
2
3jQuery(window).on('load', function(){
4    jQuery('.ht_qrcode').each(function(){
5        jQuery(this).find('canvas').hide();
6    });
7});
8
9jQuery(document).ready(function($) {
10    'use strict';
11    
12	$("body").on("click",".qrcode-download",function (e) {
13        function dataURItoBlob(dataURI) {
14            for (var byteString = atob(dataURI.split(",")[1]), mimeString = dataURI.split(",")[0].split(":")[1].split(";")[0], ab = new ArrayBuffer(byteString.length), ia = new Uint8Array(ab), i = 0; i < byteString.length; i++) ia[i] = byteString.charCodeAt(i);
15            var blob;
16            return new Blob([ab], {
17                type: mimeString
18            })
19        }
20        var dataTarget = $(this).data('target'),
21            dataUri = $(dataTarget).children("img").last().attr("src");
22        if (navigator.msSaveBlob) {
23            var blob = dataURItoBlob(dataUri);
24            return navigator.msSaveBlob(blob, dataUri + "-qrcode.png")
25        } else {
26            $(this).attr("href", dataUri), $(this).attr("download", "QR_Code.png");
27        }
28    });  
29});
30
31//QR Code Print 
32printDivCSS = new String ();
33function printDiv(divId) {
34    window.frames["qrcode_print_frame"].document.body.innerHTML=printDivCSS + document.getElementById(divId).innerHTML;
35    window.frames["qrcode_print_frame"].window.focus();
36    window.frames["qrcode_print_frame"].window.print();
37}