- TechDailyFeed - Your Daily Dose of Tech News, AI, Programming, and More

The Issue While working on authentication in my MERN stack project, I faced a strange bug: ✅ Access token was successfully sent to the frontend. ❌ But when making requests to protected routes, it showed "Invalid Access". The Root Cause The problem was in my cookie settings: const options = { httpOnly: true, secure: process.env.NODE_ENV === "production", sameSite: process.env.NODE_ENV === "production" ? "None" : "Lax", }; return res .status(200) .cookie("accessToken", accessToken, options) .cookie("refreshToken", refreshToken, options) .json( new ApiResponse( 200, { user: loggedInUser, accessToken, refreshToken, }, "user logged in successfully" ) );

Mar 8, 2025 - 18:57

The Issue

While working on authentication in my MERN stack project, I faced a strange bug:

✅ Access token was successfully sent to the frontend.
❌ But when making requests to protected routes, it showed "Invalid Access".

The Root Cause

The problem was in my cookie settings:

const options = {
    httpOnly: true, 
    secure: process.env.NODE_ENV === "production", 
    sameSite: process.env.NODE_ENV === "production" ? "None" : "Lax",
};

return res
    .status(200)
    .cookie("accessToken", accessToken, options)
    .cookie("refreshToken", refreshToken, options)
    .json(
      new ApiResponse(
        200,
        {
          user: loggedInUser,
          accessToken,
          refreshToken,
        },
        "user logged in successfully"
      )
    );