Agfdhyk

A class AnyId is defined in core.ts.

In time.ts some more methods are added into it. I extend the type of AnyIf by declaration merging:

declare module './core' {

  interface AnyId {

    time(unit?: TimeUnit): AnyId;

    since(t: Date): AnyId;

  }

}

It works fine in the test case. Typing of additional methods time and since are available.

But after the module is published as npm module and being imported, declaration merge doesn't work:

import {anyid} from 'anyid';

anyid().encode('Aa0').time().since(new Date('2018-11-1'));

//                    ^^^^ error TS2339: Property 'time' does not exist on type 'AnyId'.

Declaration merging done in time.ts is not visible when you import from published anyid module, because published index.d.ts does not reference time module at all.

Published index.d.ts contains only

import { AnyId } from './core';

declare function anyid(): AnyId;

export default anyid;

export {  AnyId, anyid };

The line in the source index.ts which imported Time from ./time was elided by the compiler, because Time is not used as type in any of the declarations emitted in index.d.ts.

The easiest way to fix it is to add explicit reference to time in index.ts, as recommended here, or just re-export Time:

import { AnyId } from './core';

import { Time } from './time';

import { Random } from './random';

import { Fixed } from './fixed';

import { Sequence } from './seq';

import { Func } from './function';

import { Variable } from './variable';



export { Time } from './time';