From f8275f1b87047c7c9249eafb5a7ea8972add608a Mon Sep 17 00:00:00 2001
From: Paul Phan <phanminh65@gmail.com>
Date: Thu, 26 Sep 2019 18:32:22 +0700
Subject: [PATCH] prevent unnecessary update

---
 package.json | 2 +-
 src/index.ts | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/package.json b/package.json
index 5cf6a0d..bdde68f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "global-state-hook",
-	"version": "1.1.2",
+	"version": "1.1.3",
 	"description": "~200kb for exactly what you need to manage global state",
 	"source": "src/index.ts",
 	"main": "dist/index.js",
diff --git a/src/index.ts b/src/index.ts
index 60cca30..a06de37 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -33,9 +33,13 @@ export function useSubscription(subscriber: ISubscription, pick: string[] = []):
 	}, [])
 
 	React.useEffect(() => {
-		const updater = (nextState: State) => (!pick.length || typeof nextState !== "object" || (Object.keys(nextState).find(k => pick.includes(k)))) && setUpdate({})
+		let mounted = true
+		const updater = (nextState: State) => mounted && (!pick.length || typeof nextState !== "object" || (Object.keys(nextState).find(k => pick.includes(k)))) && setUpdate({})
 		subscriber.subscribe(updater)
-		return () => subscriber.unsubscribe(updater)
+		return () => {
+			mounted = false
+			subscriber.unsubscribe(updater)
+		}
 	}, [])
 	return { state, setState }
 }