From c6e2b584afbd936611a86b1015fef0f9c97ec178 Mon Sep 17 00:00:00 2001
From: Nicolas Gallagher <nicolasgallagher@gmail.com>
Date: Sat, 21 Apr 2018 12:05:42 -0700
Subject: [PATCH] [fix] AppRegistry.getApplication shouldn't throw if missing
 options

Fix #899
---
 .../src/exports/AppRegistry/__tests__/index-test.js          | 5 +++++
 packages/react-native-web/src/exports/AppRegistry/index.js   | 4 ++--
 website/storybook/2-apis/AppRegistry/AppRegistryScreen.js    | 2 +-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/packages/react-native-web/src/exports/AppRegistry/__tests__/index-test.js b/packages/react-native-web/src/exports/AppRegistry/__tests__/index-test.js
index f059f7fa..cab2ebdf 100644
--- a/packages/react-native-web/src/exports/AppRegistry/__tests__/index-test.js
+++ b/packages/react-native-web/src/exports/AppRegistry/__tests__/index-test.js
@@ -22,6 +22,11 @@ describe('AppRegistry', () => {
       ExecutionEnvironment.canUseDOM = canUseDOM;
     });
 
+    test('does not throw when missing appParameters', () => {
+      AppRegistry.registerComponent('App', () => RootComponent);
+      expect(() => AppRegistry.getApplication('App')).not.toThrow();
+    });
+
     test('returns "element" and "getStyleElement"', () => {
       AppRegistry.registerComponent('App', () => RootComponent);
 
diff --git a/packages/react-native-web/src/exports/AppRegistry/index.js b/packages/react-native-web/src/exports/AppRegistry/index.js
index 3804c1c3..a5f19fff 100644
--- a/packages/react-native-web/src/exports/AppRegistry/index.js
+++ b/packages/react-native-web/src/exports/AppRegistry/index.js
@@ -58,7 +58,7 @@ export default class AppRegistry {
       getApplication: appParameters =>
         getApplication(
           componentProviderInstrumentationHook(componentProvider),
-          appParameters.initialProps || emptyObject,
+          appParameters ? appParameters.initialProps : emptyObject,
           wrapperComponentProvider && wrapperComponentProvider(appParameters)
         ),
       run: appParameters =>
@@ -90,7 +90,7 @@ export default class AppRegistry {
     return appKey;
   }
 
-  static runApplication(appKey: string, appParameters?: Object): void {
+  static runApplication(appKey: string, appParameters: Object): void {
     const isDevelopment = process.env.NODE_ENV !== 'production';
     const params = { ...appParameters };
     params.rootTag = `#${params.rootTag.id}`;
diff --git a/website/storybook/2-apis/AppRegistry/AppRegistryScreen.js b/website/storybook/2-apis/AppRegistry/AppRegistryScreen.js
index e8496d19..3abff5ef 100644
--- a/website/storybook/2-apis/AppRegistry/AppRegistryScreen.js
+++ b/website/storybook/2-apis/AppRegistry/AppRegistryScreen.js
@@ -93,7 +93,7 @@ const AppRegistryScreen = () => (
 })`
         }}
         name="static runApplication"
-        typeInfo="(appKey: string, appParameters?: object) => void"
+        typeInfo="(appKey: string, appParameters: object) => void"
       />
 
       <DocItem