Copy to clipboard

                document.getElementById("copyToClipboard").addEventListener("click", function () {
                    var input = document.getElementById("clipboardSource");
                    input.select();
                    var successful = document.execCommand("copy");
                    if (successful) {
                        alert('Copied "' + input.value + '" to your clipboard.');
                    } else {
                        throw new Error("Failed to copy text (verify caller was in the context of an event handler)");
                    }
                });