利用cookie達成頁面跳轉提示

狀況

第一次出手與失敗

定義問題

尋找

撥雲見月

router.get("/", (req, res) => {
const message = req.cookies.message;
//當message 不為空值時便會渲染中message中的訊息
res.render("login", { message });
//顯示完後清空message，避免重複顯示
res.clearCookie("message");
});
router.post("/", (req, res) => {
const { email, password } = req.body;
const user = User.find((user) => email === user.email);
if (user) {
if (user.password === password) {
res.cookie("login", "true");
res.cookie("firstName", user.firstName);
res.redirect("/auth/profile");
} else {
//將需要顯示的訊息寫入cookie
res.cookie("message", "email of password is wrong");
res.redirect("/");
}
});