整理した

src/client/app/common/scripts/copy-to-clipboard.ts

@@ -0,0 +1,13 @@
+/**
+ * Clipboardに値をコピー(TODO: 文字列以外も対応)
+ */
+export default val => {
+	const form = document.createElement('textarea');
+	form.textContent = val;
+	document.body.appendChild(form);
+	form.select();
+	const result = document.execCommand('copy');
+	document.body.removeChild(form);
+
+	return result;
+};