From 223f4e532c4ce3b94d38e259312b7c26153c0a7d Mon Sep 17 00:00:00 2001
From: C_Minor <luca.campa.94@gmail.com>
Date: Sun, 24 Jun 2018 20:52:07 +0200
Subject: [PATCH] Values added for event argument in addListener

---
 types/react-navigation/index.d.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/types/react-navigation/index.d.ts b/types/react-navigation/index.d.ts
index 0c67c333a0..75bc217615 100644
--- a/types/react-navigation/index.d.ts
+++ b/types/react-navigation/index.d.ts
@@ -17,6 +17,7 @@
 //                 Ciaran Liedeman <https://github.com/cliedeman>
 //                 Edward Sammut Alessi <https://github.com/Slessi>
 //                 Jérémy Magrin <https://github.com/magrinj>
+//                 Luca Campana <https://github.com/TizioFittizio>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.6
 
@@ -578,7 +579,7 @@ export interface NavigationScreenProp<S, P = NavigationParams> {
   getParam: <T extends keyof P>(param: T, fallback?: P[T]) => P[T];
   setParams: (newParams: Partial<P>) => boolean;
   addListener: (
-    eventName: string,
+    eventName: 'willBlur' | 'willFocus' | 'didFocus' | 'didBlur',
     callback: NavigationEventCallback
   ) => NavigationEventSubscription;
   push: (