remove sidebar;

create context to check login and keep user info;

src/components/Navbar.js

 import * as React from "react";
+import { useContext } from "react";
 import { styled, alpha } from "@mui/material/styles";
 import AppBar from "@mui/material/AppBar";
 import Box from "@mui/material/Box";
@@ -13,19 +14,16 @@ import MenuIcon from "@mui/icons-material/Menu";
 import SearchIcon from "@mui/icons-material/Search";
 import AccountCircle from "@mui/icons-material/AccountCircle";
 import MailIcon from "@mui/icons-material/Mail";
-import NotificationsIcon from "@mui/icons-material/Notifications";
-import MoreIcon from "@mui/icons-material/MoreVert";
 import { Divider } from "@mui/material";
 import List from "@mui/material/List";
 import { ListItem } from "@mui/material";
 import { ListItemButton } from "@mui/material";
 import { ListItemIcon } from "@mui/material";
-import PropTypes from "prop-types";
-import CssBaseline from "@mui/material/CssBaseline";
-import Drawer from "@mui/material/Drawer";
 import InboxIcon from "@mui/icons-material/MoveToInbox";
 import ListItemText from "@mui/material/ListItemText";
 import ShoppingCart from "@mui/icons-material/ShoppingCart";
+import { UserContext } from "@/pages/_app";
+import Link from "next/link";
 
 const Search = styled("div")(({ theme }) => ({
   position: "relative",
@@ -73,7 +71,7 @@ const drawer = (
     <Divider />
     <List>
       {["Inbox", "Starred", "Send email", "Drafts"].map((text, index) => (
-        <ListItem key={text} disablePadding>
+        <ListItem key={index} disablePadding>
           <ListItemButton>
             <ListItemIcon>
               {index % 2 === 0 ? <InboxIcon /> : <MailIcon />}
@@ -88,7 +86,7 @@ const drawer = (
 );
 
 function Navbar(props) {
-  const drawerWidth = props.drawerWidth ?? 200;
+  const user = useContext(UserContext);
   const { window } = props;
   const [anchorEl, setAnchorEl] = React.useState(null);
   const [mobileMoreAnchorEl, setMobileMoreAnchorEl] = React.useState(null);
@@ -142,13 +140,18 @@ function Navbar(props) {
     </Menu>
   );
 
-  const MenuList = [
+  const MenuList = user?.value?.name
+    ? [
         {
           id: 0,
           label: "ตระกร้า",
-      link: '/cart',
+          link: "/cart",
           element: (
-        <IconButton size="large" aria-label="show 4 new mails" color="inherit">
+            <IconButton
+              size="large"
+              aria-label="show 4 new mails"
+              color="inherit"
+            >
               <Badge badgeContent={4} color="error">
                 <ShoppingCart />
               </Badge>
@@ -172,6 +175,14 @@ function Navbar(props) {
             </IconButton>
           ),
         },
+      ]
+    : [
+        {
+          id: 0,
+          lable: "Login",
+          element: "Login",
+          link: "/login",
+        },
       ];
 
   const mobileMenuId = "primary-search-account-menu-mobile";
@@ -191,36 +202,23 @@ function Navbar(props) {
       open={isMobileMenuOpen}
       onClose={handleMobileMenuClose}
     >
-      {MenuList.map((menu) => (
-        <>
+      {MenuList.map((menu, idx) => (
+        <span key={idx}>
+          <Link className="text-black no-underline" href={menu.link}>
             <MenuItem>
               {menu.element}
               <p>{menu.label}</p>
             </MenuItem>
-        </>
+          </Link>
+        </span>
       ))}
     </Menu>
   );
 
   return (
     <>
-      <AppBar
-        position="fixed"
-        sx={{
-          width: { md: `calc(100% - ${drawerWidth}px)` },
-          ml: { md: `${drawerWidth}px` },
-        }}
-      >
+      <AppBar position="fixed">
         <Toolbar>
-          <IconButton
-            size="large"
-            edge="start"
-            color="inherit"
-            aria-label="open drawer"
-            sx={{ mr: 2, display: { md: "none" } }}
-          >
-            <MenuIcon onClick={handleDrawerToggle} />
-          </IconButton>
           <Typography
             variant="h6"
             noWrap
@@ -240,7 +238,11 @@ function Navbar(props) {
           </Search>
           <Box sx={{ flexGrow: 1 }} />
           <Box sx={{ display: { xs: "none", md: "flex" } }}>
-            {MenuList.map((menu) => menu.element)}
+            {MenuList.map((menu, idx) => (
+              <Link className="text-white" key={idx} href={menu.link}>
+                <span>{menu.element}</span>
+              </Link>
+            ))}
           </Box>
           <Box sx={{ display: { xs: "flex", md: "none" } }}>
             <IconButton
@@ -251,56 +253,18 @@ function Navbar(props) {
               onClick={handleMobileMenuOpen}
               color="inherit"
             >
-              <MoreIcon />
+              <MenuIcon />
             </IconButton>
           </Box>
         </Toolbar>
       </AppBar>
       {renderMobileMenu}
       {renderMenu}
-      <Box
-        component="nav"
-        sx={{ width: { sm: drawerWidth }, flexShrink: { sm: 0 } }}
-        aria-label="mailbox folders"
-      >
-        {/* The implementation can be swapped with js to avoid SEO duplication of links. */}
-        <Drawer
-          container={container}
-          variant="temporary"
-          open={mobileOpen}
-          onClose={handleDrawerToggle}
-          ModalProps={{
-            keepMounted: true, // Better open performance on mobile.
-          }}
-          sx={{
-            display: { xs: "block", sm: "block", md: "none" },
-            "& .MuiDrawer-paper": {
-              boxSizing: "border-box",
-              width: drawerWidth,
-            },
-          }}
-        >
-          {drawer}
-        </Drawer>
-        <Drawer
-          variant="permanent"
-          sx={{
-            display: { xs: "none", md: "block" },
-            "& .MuiDrawer-paper": {
-              boxSizing: "border-box",
-              width: drawerWidth,
-            },
-          }}
-          open
-        >
-          {drawer}
-        </Drawer>
-      </Box>
     </>
   );
 }
 
-Navbar.PropTypes = {
-  window: PropTypes.func,
-};
+// Navbar.PropTypes = {
+//   window: PropTypes.func,
+// };
 export default Navbar;

src/components/layout/UserLayout.js

 import React from "react";
 import Navbar from "../Navbar";
 import { Box } from "@mui/material";
+import { Toolbar } from "@mui/material";
 
 export default function UserLayout({ children }) {
-  const drawerWidth = 200;
   return (
     <>
       <Box sx={{ display: "flex" }}>
-        <Navbar drawerWidth={drawerWidth} />
+        <Navbar />
         {/* <Sidebar /> */}
         <Box
           component="main"
           sx={{
             flexGrow: 1,
             p: 3,
-            width: { sm: `calc(100% - ${drawerWidth}px)` },
           }}
         >
+          <Toolbar />
           {children}
         </Box>
       </Box>

src/pages/_app.js

-import Navbar from "@/components/Navbar";
 import "@/styles/globals.css";
 import "@fontsource/roboto/300.css";
 import "@fontsource/roboto/400.css";
 import "@fontsource/roboto/500.css";
 import "@fontsource/roboto/700.css";
+import { createContext, useState, useEffect } from "react";
 import UserLayout from "@/components/layout/UserLayout";
 // axios.defaults.baseURL = ""
 
+export const UserContext = createContext(null);
+
 export default function App({ Component, pageProps }) {
+  const [user, setUser] = useState({ name: "Nawasan" });
+  useEffect(() => {
+    setTimeout(() => {
+      setUser({ name: "" });
+    }, 3000);
+  });
   return (
-    <>
+    <UserContext.Provider value={{ value: user, set: setUser }}>
       <UserLayout>
         <Component {...pageProps} />
       </UserLayout>
-    </>
+    </UserContext.Provider>
   );
 }

src/pages/_document.js

-import { Html, Head, Main, NextScript } from 'next/document'
-
-export default function Document() {
-  return (
-    <Html lang="en">
-      <Head />
-      <body>
-        <Main />
-        <NextScript />
-      </body>
-    </Html>
-  )
-}

src/pages/_error.js

+import React from "react";
+
+export default function Error() {
+  return <div>Error</div>;
+}

src/pages/register.js

 import userCookie from "@/components/lib/user";
 import { Box, TextField, Toolbar } from "@mui/material";
 import React from "react";
+import {useContext} from 'react'
+import { UserContext } from "./_app";
+
 
 export default function Login() {
-  let user = new userCookie();
-  if (user.isLogin())
+  const user = useContext(UserContext)
+  if (true)
     return (
       <div>
-        <h3>คุณเข้าสู่ระบบแล้ว</h3>
+        <h3>{user.value.name}</h3>
       </div>
     );
     
@@ -20,7 +23,6 @@ export default function Login() {
             "& .MuiTextField-root": { m: 1, width: "25ch" },
           }}
         >
-          <Toolbar />
           <TextField label="ชื่อ" type="text" />
         </Box>
       </main>

src/styles/globals.css

@@ -7,3 +7,8 @@ body {
   padding: 0;
   box-sizing: border-box;
 }
+
+header a {
+  color: white;
+  text-decoration: none;
+}