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The export type of namespace presents the wrong typing alert  #37408

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Description

TypeScript Version: 3.7.2

Search Terms:
namespace, typing

Code

type Nullable<T> = T | null

export namespace ProfileFields {
   type name = string;
   type WHYYY = string | null;
   type id = string | null;
  // export type WHYYY = Nullable<string>;
  // export type id = Nullable<string>;
}

export interface Profile {
  name: ProfileFields.name;
  WHYYY: ProfileFields.WHYYY;
  id: ProfileFields.id;
}

export type General = Pick<Profile, 'WHYYY' | 'name' | 'id'>

Expected behavior:

type General = {
WHYYY: ProfileFields.WHHYY
name: ProfileFields.name
id: ProfileFields.id
}

Actual behavior:

type General = {
WHYYY: ProfileFields.WHHYY
name: ProfileFields.name
id: ProfileFields.WHHYY
}

Playground Link: Provided

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    Working as IntendedThe behavior described is the intended behavior; this is not a bug

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