Publish the current namespace as a new module

Imagine I have a module where I define a namespace with various properties. Here's an example:

declare module "database" {
  export namespace Database {
    namespace statics {
      type static1 = any;
      type static2 = any;
    }
  }
  const database: Database;
  export default database;
}

To access these properties, I can use

import { Database } from "database"
and then refer to Database.statics.static as a type.

Now, I want to create another module that allows direct import of the statics. For instance:

declare module "database/statics"

I want to avoid redefining all the type definitions since there could be many more than shown in this example. I attempted to move the module definitions out, but I'm unsure how to achieve something like this:

declare namespace Database { ... }
declare module "database/statics" {
  export = Database.statics;
}

This results in

Property 'statics' does not exist on type 'Database'
.

In essence, my question boils down to: Is there a way to export a namespace from a module when it is declared in another module?

Answer №1

To address your query accurately, you can utilize a triple slash reference directive in TypeScript to instruct it to import definitions from another file/module:

database.d.ts:

declare module "database" {
    export namespace Database {
        namespace Statics {
            export type static1 = any;
            export type static2 = any;
        }
    }
}

database-static.d.ts:

///<reference path="database.d.ts"/>

declare module "database-statics" {
    import {Database} from "database";
    import Statics = Database.Statics;

    export = Statics;
}

In the given example, both of these .d.ts files should be stored in the same directory. If you decide to separate them into distinct modules, then you would require using a

///<reference types="database"/>
instead.

It is essential to understand that this will establish a dependency between the two modules. Consequently, exporting the definitions from a second module may not result in significant benefits.

import * as Statics from "database-statics";

This scenario is essentially identical to:

import {Database} from "database";
import Statics = Database.Statics;

Furthermore, both modules containing your respective .d.ts files must exist for the former case to function correctly.

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