New password reset flow (#9581)

src/components/structures/ErrorMessage.tsx

@@ -0,0 +1,40 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { ReactNode } from 'react';
+
+import { Icon as WarningBadgeIcon } from "../../../res/img/element-icons/warning-badge.svg";
+
+interface ErrorMessageProps {
+    message: string | ReactNode | null;
+}
+
+/**
+ * Error message component.
+ * Reserves two lines to display errors to prevent layout shifts when the error pops up.
+ */
+export const ErrorMessage: React.FC<ErrorMessageProps> = ({
+    message,
+}) => {
+    const icon = message
+        ? <WarningBadgeIcon className="mx_Icon mx_Icon_16" />
+        : null;
+
+    return <div className="mx_ErrorMessage">
+        { icon }
+        { message }
+    </div>;
+};