https://worldpics.com.au/res/Clipboard.js

1window.Clipboard = (function(window, document, navigator) {
2    var textArea,
3        copy;
4
5    function isOS() {
6        return navigator.userAgent.match(/ipad|iphone/i);
7    }
8
9    function createTextArea(text) {
10        textArea = document.createElement('textArea');
11        textArea.value = text;
12        document.body.appendChild(textArea);
13    }
14
15    function selectText() {
16        var range,
17            selection;
18
19        if (isOS()) {
20            range = document.createRange();
21            range.selectNodeContents(textArea);
22            selection = window.getSelection();
23            selection.removeAllRanges();
24            selection.addRange(range);
25            textArea.setSelectionRange(0, 999999);
26        } else {
27            textArea.select();
28        }
29    }
30
31    function copyToClipboard() {        
32        document.execCommand('copy');
33        document.body.removeChild(textArea);
34    }
35
36    copy = function(text) {
37        createTextArea(text);
38        selectText();
39        copyToClipboard();
40    };
41
42    return {
43        copy: copy
44    };
45})(window, document, navigator);