Express Sessions 1.17.1+ ( req.session.myUserId )

Question

I noticed changes in express-session 1.17.1+ so I can't just put custom property (like req.session.userId) into req.session. It causes a type check error. I tried to extend SessionData, Object.defineProperty and many other options but for some reason, it doesn't work. Please help!

I wrote a simple code to reproduce problem clearly here

Answer 1

Maybe this will work for you, I share it with you to save time.

modify file tsconfig.json and add

"typeRoots": [
    "@types",
    "./node_modules/@types"
]

create file with following content: @types/express/index.d.ts

import "express-session";

// what we are all looking to solve xD
// req.session.propertyX
declare module "express-session" {
    interface SessionData {
        propertyX: number;
    }
}

// additional properties on other objects
// req.propertyY
declare global {
    namespace Express {
        interface Request {
            propertyY: number;
        }
    }
}

hope it works for you, and saves time.