From 39859a55d3ac7d5718f550039a903e8f124a651d Mon Sep 17 00:00:00 2001
From: restrry <restrry@gmail.com>
Date: Tue, 28 Apr 2020 13:51:12 +0200
Subject: [PATCH] load SettingsOptions component lazily

---
 .../vis_type_markdown/public/markdown_vis.ts  |  2 +-
 .../public/settings_options.tsx               |  4 ++-
 .../public/settings_options_lazy.tsx          | 30 +++++++++++++++++++
 3 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 src/plugins/vis_type_markdown/public/settings_options_lazy.tsx

diff --git a/src/plugins/vis_type_markdown/public/markdown_vis.ts b/src/plugins/vis_type_markdown/public/markdown_vis.ts
index b84d9638eb973..3309330d7527c 100644
--- a/src/plugins/vis_type_markdown/public/markdown_vis.ts
+++ b/src/plugins/vis_type_markdown/public/markdown_vis.ts
@@ -21,7 +21,7 @@ import { i18n } from '@kbn/i18n';
 
 import { MarkdownVisWrapper } from './markdown_vis_controller';
 import { MarkdownOptions } from './markdown_options';
-import { SettingsOptions } from './settings_options';
+import { SettingsOptions } from './settings_options_lazy';
 import { DefaultEditorSize } from '../../vis_default_editor/public';
 
 export const markdownVisDefinition = {
diff --git a/src/plugins/vis_type_markdown/public/settings_options.tsx b/src/plugins/vis_type_markdown/public/settings_options.tsx
index 6f6a80564ce07..bf4570db5d4a0 100644
--- a/src/plugins/vis_type_markdown/public/settings_options.tsx
+++ b/src/plugins/vis_type_markdown/public/settings_options.tsx
@@ -52,4 +52,6 @@ function SettingsOptions({ stateParams, setValue }: VisOptionsProps<MarkdownVisP
   );
 }
 
-export { SettingsOptions };
+// default export required for React.Lazy
+// eslint-disable-next-line import/no-default-export
+export { SettingsOptions as default };
diff --git a/src/plugins/vis_type_markdown/public/settings_options_lazy.tsx b/src/plugins/vis_type_markdown/public/settings_options_lazy.tsx
new file mode 100644
index 0000000000000..a29e3a9341b6d
--- /dev/null
+++ b/src/plugins/vis_type_markdown/public/settings_options_lazy.tsx
@@ -0,0 +1,30 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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, { lazy, Suspense } from 'react';
+import { EuiLoadingSpinner } from '@elastic/eui';
+
+// @ts-ignore
+const SettingsOptionsComponent = lazy(() => import('./settings_options'));
+
+export const SettingsOptions = (props: any) => (
+  <Suspense fallback={<EuiLoadingSpinner />}>
+    <SettingsOptionsComponent {...props} />
+  </Suspense>
+);