error TS2339: Property 'email' does not exist on type 'Object'

Question

Replace (data) with (data : any) on 3rd line.

Property 'hostname' does not exist on type 'Object'.

I'm using Vue and typescript, error occurred on debug when trying to console.log this.dropdownItems[0].hostname after loading some data in. The error for me looks to be a typescript type check on the declaration of the variable:

dropdownItems: Array<Object> = []

should have been:

dropdownItems: any[] = []

Derived from: https://www.reddit.com/r/ionic/comments/9cxc79/property_courses_does_not_exist_on_type_object/

The Most upvoted answer is not great because it defeats the whole purpose of Typescript also mentioned by @Alex Lomia

Solution for this are -

1. To fix this, create an interface that describes your schema and extends mongoose.Document: check this similar question here - similar question

2. Use Javascript instead of TypeScript , if someone is using NestJS in the backend is most likely to run into this error so if you don't want to go through the process of making interfaces and DTO's use javascript , also with javascript the built file will be smaller too .

or better practice to use interfaces. you may declare the interface:

export interface DataI {

 email: string;
 ...
 constructor(...){this.email = email .....}

and then use it as type

This same error occurred in my Nodejs Typescript project -

Code -

app.post('/form-submit', (req, res) => {
   const errors = {};
   if (...condition) {
      errors.email = ['Email is not valid.'];
   }
});

Error -

Property 'email' does not exist on type '{}'.ts(2339)

Solution (add :any and the error resolve) -

const errors:any = {};