https://torgovie-automaty.ru/js/copy.js?v=3

1(function ($) {
2    function addLink() {
3        var i, len, selection, source, copyHolder, borderStart, borderEnd, range;
4
5        selection = window.getSelection();
6        source = '<br /> Èñòî÷íèê: <a href="' + document.location.href + '">' + document.location.href + '</a>';
7
8        copyHolder = $('<div></div>');
9        copyHolder.css({position: 'fixed', 'left': '-99999px', 'top': 0});
10
11        for (i = 0, len = selection.rangeCount; i < len; i += 1) {
12            copyHolder.append(selection.getRangeAt(i).cloneContents());
13        }
14        copyHolder.append(source);
15
16        borderStart = $('<div></div>');
17        borderEnd = $('<div></div>');
18        copyHolder.prepend(borderStart);
19        copyHolder.append(borderEnd);
20
21        $('body').append(copyHolder);
22
23        range = document.createRange();
24        range.selectNodeContents(copyHolder[0]);
25        range.setStartAfter(borderStart[0]);
26        range.setEndBefore(borderEnd[0]);
27
28        selection.removeAllRanges();
29        selection.addRange(range);
30
31        window.setTimeout(function () {
32            copyHolder.remove();
33        }, 0);
34    }
35
36    if( typeof(is_super) == "undefined" ){
37        document.addEventListener('copy', addLink);
38    }
39
40})(jQuery);
41