Typescript TS7006 Parameter xxx implicitly has an any type

0 votes

In testing my UserRouter, I am using a json file

data.json

[
  {
    "id": 1,
    "name": "Luke Cage",
    "aliases": ["Carl Lucas", "Power Man", "Mr. Bulletproof", "Hero for Hire"],
    "occupation": "bartender",
    "gender": "male",
    "height": {
      "ft": 6,
      "in": 3
    },
    "hair": "bald",
    "eyes": "brown",
    "powers": [
      "strength",
      "durability",
      "healing"
    ]
  },
  {
  ...
  }
]

Building my app, I get the following TS error

ERROR in ...../UserRouter.ts
(30,27): error TS7006: Parameter 'user' implicitly has an 'any' type.

UserRouter.ts

import {Router, Request, Response, NextFunction} from 'express';
const Users = require('../data');

export class UserRouter {
  router: Router;

  constructor() {
  ...
  }

  /**
   * GET one User by id
   */
  public getOne(req: Request, res: Response, _next: NextFunction) {
    let query = parseInt(req.params.id);
 /*[30]->*/let user = Users.find(user => user.id === query);
    if (user) {
      res.status(200)
        .send({
          message: 'Success',
          status: res.status,
          user
        });
    }
    else {
      res.status(404)
        .send({
          message: 'No User found with the given id.',
          status: res.status
        });
    }
  }


}

const userRouter = new UserRouter().router;
export default userRouter;
Jun 10 in TypeSript by Logan
• 1,580 points
67 views

1 answer to this question.

0 votes

You are using the --noImplicitAny and TypeScript doesn't know about the type of the Users object. In this case, you need to explicitly define the user type.

Change this line:

let user = Users.find(user => user.id === query);

to this:

let user = Users.find((user: any) => user.id === query); 
// use "any" or some other interface to type this argument

Or define the type of your Users object:

//...
interface User {
    id: number;
    name: string;
    aliases: string[];
    occupation: string;
    gender: string;
    height: {ft: number; in: number;}
    hair: string;
    eyes: string;
    powers: string[]
}
//...
const Users = <User[]>require('../data');
//...
answered Jun 10 by Nina
• 2,900 points

Related Questions In TypeSript

0 votes
1 answer

What is "not assignable to parameter of type never" error in TypeScript?

All you have to do is define ...READ MORE

answered May 31 in TypeSript by Nina
• 2,900 points
15 views
0 votes
1 answer
0 votes
1 answer

Interface type check with Typescript

You can achieve what you want without ...READ MORE

answered May 31 in TypeSript by Nina
• 2,900 points
34 views
0 votes
1 answer
0 votes
1 answer

What does <T> do in TypeSript?

This is a TS Generics declaration. T will be declared ...READ MORE

answered May 31 in TypeSript by Nina
• 2,900 points
7 views
0 votes
1 answer

What does the @ (at sign) sign do in TypeScript?

The big news this week is the ...READ MORE

answered Jun 10 in TypeSript by Nina
• 2,900 points
9 views
0 votes
1 answer
0 votes
1 answer

how to use spread syntax and new Set() with TypeScript

The ... operator should work on anything ...READ MORE

answered Jun 10 in TypeSript by Nina
• 2,900 points
7 views
0 votes
1 answer
0 votes
1 answer

TypeScript Object assign gives me an error property assign does not exist on type ObjectConstructor

For TypeScript 2.1 and higher, you can ...READ MORE

answered May 31 in TypeSript by Nina
• 2,900 points
21 views
webinar REGISTER FOR FREE WEBINAR X
Send OTP
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP