What is the solution to the TypeScript error stating that there is no index signature with a parameter of type 'string' on the 'Object' type?

While working on an Angular project, I came across an issue when writing a Typescript function for a service. The error message stated: "Element implicitly has an 'any' type because expression of type 'string' can't be used to index type 'Object'. No index signature with a parameter of type 'string' was found on type 'Object'."

I need help in solving this problem. Here is the link to my code:

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { IProperty } from '../property/IProperty.interface';

@Injectable({
  providedIn: 'root'
})
export class HousingService {

  constructor(private http: HttpClient) { }

  //method for getting all the real estate properties
  getAllProperties(): Observable<IProperty[]> {
    return this.http.get('../../data/properties.json').pipe(
      map(data => {
        const propertiesArray: Array<IProperty> = [];
        for (const id in data) {
          if (data.hasOwnProperty(id)) {
            propertiesArray.push(data[id]);
          }
        }
        return propertiesArray;
      })
    );
  }
}

Answer №1

fetchData is a versatile method that allows for the specification of data types, such as using { [key: string]: string } as demonstrated below:

return fetchData<{ [key: string]: string }>('../../data/properties.json').pipe(

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