From b962adfc2b979e5526ee099fd43366db7abfcc47 Mon Sep 17 00:00:00 2001
From: Dominic Gannaway <trueadm@users.noreply.github.com>
Date: Thu, 23 May 2019 01:29:07 +0100
Subject: [PATCH] [Flare] event component displayName is now mandatory (#15717)

---
 packages/shared/ReactTypes.js       | 2 +-
 packages/shared/getComponentName.js | 5 +----
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/packages/shared/ReactTypes.js b/packages/shared/ReactTypes.js
index c8e73e6659..1bcda49e3c 100644
--- a/packages/shared/ReactTypes.js
+++ b/packages/shared/ReactTypes.js
@@ -137,7 +137,7 @@ export type ReactEventComponentInstance = {|
 
 export type ReactEventComponent = {|
   $$typeof: Symbol | number,
-  displayName?: string,
+  displayName: string,
   props: null | Object,
   responder: ReactEventResponder,
 |};
diff --git a/packages/shared/getComponentName.js b/packages/shared/getComponentName.js
index 6e7c021227..6923fa8d17 100644
--- a/packages/shared/getComponentName.js
+++ b/packages/shared/getComponentName.js
@@ -95,10 +95,7 @@ function getComponentName(type: mixed): string | null {
       case REACT_EVENT_COMPONENT_TYPE: {
         if (enableEventAPI) {
           const eventComponent = ((type: any): ReactEventComponent);
-          const displayName = eventComponent.displayName;
-          if (displayName !== undefined) {
-            return displayName;
-          }
+          return eventComponent.displayName;
         }
         break;
       }