Decorators and Private fields javascript

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I find myself trying to use decorators with the native javascript private properties (#) and these first 'recognize' that are in use do not work.

I identified this by using the class-validator decorators on the private properties of my value objects.

The error I get in my code editor is: Decorators are not valid here

Example:

import { IsString } from 'class-validator';

Class Person {
  @IsString()
  #name: string;

  constructor(name: string) {
    this.#name = name;
  }

  get name(): string {
    return this.#name;
  }
}
class-validator typescript private decorator javascript
1 Answers

Okey as suggested by VLAZ:

Private fields in JS are completely private and inaccessible to anything from outside. Thus it makes sense they cannot be decorated - there is no way for the decorator to access them.

This is completely correct, so when I took a closer look at the value object I realized that it does have public get properties, so by testing it is possible to use decorators on those properties.

Leaving something like:

import { IsString } from 'class-validator';

Class Person {
  #name: string;

  constructor(name: string) {
    this.#name = name;
  }

  @IsString()
  get name(): string {
    return this.#name;
  }
}
user_146927860
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