From 81b46581ab79f8f5e9e132e00e5d1b8e9182dd46 Mon Sep 17 00:00:00 2001
From: eug-vs <eug-vs@keemail.me>
Date: Sun, 15 Nov 2020 04:07:33 +0300
Subject: feat: implement authentication

---
 src/hooks/useLocalStorage.ts | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 src/hooks/useLocalStorage.ts

(limited to 'src/hooks/useLocalStorage.ts')

diff --git a/src/hooks/useLocalStorage.ts b/src/hooks/useLocalStorage.ts
new file mode 100644
index 0000000..a604ebe
--- /dev/null
+++ b/src/hooks/useLocalStorage.ts
@@ -0,0 +1,20 @@
+import { useState, useCallback } from 'react';
+
+type Value = string | null;
+type Setter = (value: Value) => void;
+
+const useLocalStorage = (key: string): [Value, Setter] => {
+  const [state, setState] = useState<Value>(() => localStorage.getItem(key) || null);
+
+  const update: Setter = useCallback(value => {
+    if (value) localStorage.setItem(key, value);
+    else localStorage.removeItem(key);
+    setState(value);
+  }, [key]);
+
+  return [state, update];
+};
+
+
+export default useLocalStorage;
+
-- 
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