Property 'user' does not exist on type 'Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'

Question

Please help, I am getting this error

src/app/middlewares/authentication.ts:16:17 - error TS2339: Property 'user' does not exist on type 'Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.

16             req.user = user;

I have created the .d.ts file and also included it in tsconfig file. Still I am not able to run this code

Please find attached screenshots

Answer 1

1. Create a types folder in your src directory
2. Create a folder within the types folder with the name of the package you intend to extend. (In this case express).
3. Create an index.d.ts file in that folder

 src/
   - types/
    - express/
     - index.d.ts

4. add this code to the index file

import express from "express";

declare global {
  namespace Express {
    interface Request {
      user?: Record<string,any>
    }
  }
}

5. remember to update your tsconfig.json file

{
  "compilerOptions": {
    "typeRoots" : ["./src/types", "./node_modules/@types"]
  }
}

Answer 2

Just install types for Passport.js:

npm install -D @types/passport