优化userProvider

lib/userProvider.tsx

@@ -11,7 +11,7 @@ export const UserContext = createContext<{
   testLogin: () => void;
   logout: () => void;
   userInfo: UserInfoResp | null | "";
-  setUserInfo: Dispatch<SetStateAction<UserInfoResp | null | "">>;
+  setUserInfo: Dispatch<SetStateAction<UserInfoResp | null | undefined>>;
   needLogin: Boolean;
   setNeedLogin: Dispatch<SetStateAction<Boolean>>;
 }>({
@@ -27,12 +27,14 @@ type Props = {
   children: React.ReactNode;
 };
 const UserProvider = ({ children }: Props) => {
-  const [userInfo, setUserInfo] = useState<UserInfoResp | null | ''>(null);
+  const [userInfo, setUserInfo] = useState<UserInfoResp | null | undefined>(null);
   const [needLogin, setNeedLogin] = useState<Boolean>(false); //用于通知登录modal需要打开
 
   useEffect(() => {
     try {
-      setUserInfo(JSON.parse(window.localStorage.getItem("userInfo") || ""));
+      setUserInfo(
+        JSON.parse(window.localStorage.getItem("userInfo") || "") || undefined
+      );
     } catch (e) {}
   }, []);
 
@@ -48,7 +50,7 @@ const UserProvider = ({ children }: Props) => {
       if (res.code == "200") {
         window.localStorage.setItem("token", res.result?.token || "");
         api.userInfo().then((res) => {
-          setUserInfo(res.result || '');
+          setUserInfo(res.result || undefined);
         });
       }
     });
@@ -57,7 +59,7 @@ const UserProvider = ({ children }: Props) => {
   //登出
   function logout() {
     localStorage.setItem("token", "");
-    setUserInfo('');
+    setUserInfo(undefined);
   }
 
   return (