Challenges arise when attempting to merge declarations in Typescript involving passport, passport-local, and express-session

  • I'm currently facing challenges trying to integrate passport, passport-local, and express-session with Typescript.
  • After installing all four necessary libraries - @types/passport, @types/express-session @types/passport-local, and @types/express - I intend to utilize connect-redis for storing sessions in the redis database.

At the moment, I'm encountering two errors:

The error 'Property 'emailVerified' does not exist on type 'User'

and

The error 'Property 'id' does not exist on type 'User'

I attempted to create declarations based on responses from various sources like HERE, HERE, and HERE. However, none of these solutions seem to rectify the issue. It would be greatly appreciated if someone could pinpoint where I might be making a mistake.

tsconfig.json

{
  "compilerOptions": {
    "lib": ["es2020"],
    "module": "commonjs",
    "moduleResolution": "node",
    "target": "es2020",
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "noImplicitAny": false,
    "outDir": "dist",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "baseUrl": ".",
    "paths": {
      "server/*": ["src/server/*"],
      "tests/*": ["src/tests/*"],
      "data/*": ["src/data/*"],
      "config": ["src/config"]
    },
    "typeRoots": ["./src/@types", "./node_modules/@types"]
  }
}

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

declare global {
  export namespace Express {
    export interface User {
      id: string;
      emailVerified: boolean;
    }
  }
}

passport.ts

import { Express, Request } from 'express';
import passport from 'passport';
import {
  IStrategyOptionsWithRequest,
  IVerifyOptions,
  Strategy as LocalStrategy,
} from 'passport-local';
import { AuthService } from 'server/services';
import { isHashEqual } from 'server/utils/functions';

const strategyOptions: IStrategyOptionsWithRequest = {
  usernameField: 'email',
  passwordField: 'password',
  passReqToCallback: true,
};

// More passport code ...

and a snippet from the controller file

auth.controller.ts

  static async verifyEmail(req: Request, res: Response, next: NextFunction) {
    try {
      const { accountId, token } = req.params;
      // More controller code ...
    } catch (error) {
      return next(error);
    }
  }

Illustratively on VSCode, these are the errors I'm encountering, along with a similar issue regarding the emailVerified property.

If anyone could kindly provide guidance on resolving these errors, it would be highly appreciated.

https://i.sstatic.net/4ZdUO.png

Answer №1

Have you tried experimenting with adding

import * as express from 'express';
to the beginning of your custom type declaration file?

I've tested this solution myself, and while it initially appears to resolve the issue, there are some inconsistencies in its stability. After adding the import statement, everything compiles smoothly and there are no errors in VS Code. However, upon removal of the statement, the code still functions as expected, even after running tsc --build --clean. It's worth mentioning that VS Code continues to display an error despite the functionality remaining intact.

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