Set modules.

src/bootstrap/Select.js

@@ -0,0 +1,45 @@
+/*
+ * 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';
+import {useUID} from 'react-uid';
+
+
+Select.propTypes = {
+    /** Select field Label. */
+    label: PropTypes.string.isRequired,
+    /** Choices if form of {value : "Label",...}.*/
+    choices: PropTypes.object.isRequired,
+    /** Current value. */
+    value: PropTypes.oneOfType([
+        PropTypes.string,
+        PropTypes.number,
+    ]).isRequired,
+    /** Help text message. */
+    helpText: PropTypes.string,
+};
+
+export function Select({label, choices, helpText, ...props}) {
+    const uid = useUID();
+
+    const options = Object.keys(choices).map(
+        key => <option key={key} value={key}>{choices[key]}</option>
+    );
+
+    return <div className='form-group col-sm-12 offset-lg-1 col-lg-10'>
+        <label htmlFor={uid}>{label}</label>
+        <select
+            className='custom-select'
+            id={uid}
+            {...props}
+        >
+            {options}
+        </select>
+        {helpText ? <small className="form-text text-muted">{helpText}</small> : null}
+    </div>;
+}