Add: 유저 전역 상태 관리

src/recoil/authState.ts

@@ -0,0 +1,29 @@
+import { atom } from 'recoil';
+import { recoilPersist } from 'recoil-persist';
+
+export type Nullable<T> = T | null;
+
+interface User {
+  memberId: Nullable<number>;
+  email: Nullable<string>;
+  nickname: Nullable<string>;
+  image: Nullable<string>;
+  loggedIn: boolean;
+}
+
+const { persistAtom } = recoilPersist({
+  key: 'bc-member',
+  storage: sessionStorage,
+});
+
+export const authState = atom<User>({
+  key: 'authState',
+  default: {
+    memberId: null,
+    email: null,
+    nickname: null,
+    image: null,
+    loggedIn: false,
+  },
+  effects_UNSTABLE: [persistAtom],
+});