From ceb2c60855796a6fdf790809842cc32cbbd47e49 Mon Sep 17 00:00:00 2001
From: Brian Vaughn <bvaughn@fb.com>
Date: Fri, 9 Nov 2018 09:38:08 -0800
Subject: [PATCH] Updated useReducer reducer example to show default case

---
 content/docs/hooks-reference.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/content/docs/hooks-reference.md b/content/docs/hooks-reference.md
index db93175b..c72c709a 100644
--- a/content/docs/hooks-reference.md
+++ b/content/docs/hooks-reference.md
@@ -190,6 +190,10 @@ function reducer(state, action) {
       return {count: state.count + 1};
     case 'decrement':
       return {count: state.count - 1};
+    default:
+      // A reducer must always return a valid state.
+      // Alternatively you can throw an error if an invalid action is dispatched.
+      return state;
   }
 }
 
@@ -223,6 +227,10 @@ function reducer(state, action) {
       return {count: state.count + 1};
     case 'decrement':
       return {count: state.count - 1};
+    default:
+      // A reducer must always return a valid state.
+      // Alternatively you can throw an error if an invalid action is dispatched.
+      return state;
   }
 }