Merge pull request #74 from which-ecosystem/fetching

SWR feat. crazy refactor

1 files changed, 16 insertions, 0 deletions

diff --git a/src/hooks/useLocalStorage.ts b/src/hooks/useLocalStorage.ts
new file mode 100644
index 0000000..faf1411
--- /dev/null
+++ b/src/hooks/useLocalStorage.ts
@@ -0,0 +1,16 @@
+import { useState, useCallback } from 'react';
+
+type Value = string | null;
+type Setter = (value: Value) => void;
+
+export default (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];
+};