https://jooki.com.ua/catalog/view/theme/oct_techstore/js/download.js

1window.downloadFile = function (sUrl) {
2
3    //iOS devices do not support downloading. We have to inform user about this.
4    if (/(iP)/g.test(navigator.userAgent)) {
5        alert('Your device do not support files downloading. Please try again in desktop browser.');
6        return false;
7    }
8
9    //If in Chrome or Safari - download via virtual link click
10    if (window.downloadFile.isChrome || window.downloadFile.isSafari) {
11        //Creating new link node.
12        var link = document.createElement('a');
13        link.href = sUrl;
14
15        if (link.download !== undefined) {
16            //Set HTML5 download attribute. This will prevent file from opening if supported.
17            var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
18            link.download = fileName;
19        }
20
21        //Dispatching click event.
22        if (document.createEvent) {
23            var e = document.createEvent('MouseEvents');
24            e.initEvent('click', true, true);
25            link.dispatchEvent(e);
26            return true;
27        }
28    }
29
30    // Force file download (whether supported by server).
31    var query = '?download';
32
33    window.open(sUrl + query, '_self');
34}
35
36window.downloadFile.isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
37window.downloadFile.isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1;