Set modules.

src/bootstrap/Alert.js

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from 'react';
+import PropTypes from 'prop-types';
+
+Alert.propTypes = {
+    /** Type of the alert it adds as `alert-${type}` class.*/
+    type: PropTypes.string.isRequired,
+    /** Alert message.*/
+    message: PropTypes.string,
+    /** Alert content.*/
+    children: PropTypes.oneOfType([
+        PropTypes.arrayOf(PropTypes.node),
+        PropTypes.node
+    ]),
+    /** onDismiss handler.*/
+    onDismiss: PropTypes.func
+};
+
+export function Alert({type, message, onDismiss, children}) {
+    return <div className={`alert alert-dismissible alert-${type}`}>
+        {onDismiss ? <button type="button" className="close" onClick={onDismiss}>&times;</button> : false}
+        {message}
+        {children}
+    </div>
+}