meteor/meteor

Generated .d.ts files use 'module' keyword instead of 'namespace' — breaks TypeScript 6

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#14.253 geöffnet am 24. März 2026

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Beschreibung

Description

TypeScript 6 (currently in beta) enforces TS1540: A 'namespace' declaration should not be declared using the 'module' keyword. Please use the 'namespace' keyword instead.

Meteor's generated type declaration files use declare module where declare namespace is required, causing type-checking errors with TypeScript 6+.

Affected files

In .meteor/local/types/node_modules/package-types/:

  • mongo/package/os/packages/mongo/mongo.d.ts (line 502)
  • webapp/package/os/packages/webapp/webapp.d.ts (lines 25, 72)

Steps to reproduce

  1. Create a Meteor 3.x project
  2. Install TypeScript 6 (npm install typescript@next)
  3. Run tsc --noEmit

Expected behavior

Type-checking should pass without errors.

Actual behavior

.meteor/local/types/.../mongo.d.ts(502,23): error TS1540: A 'namespace' declaration should not be declared using the 'module' keyword. Please use the 'namespace' keyword instead.
.meteor/local/types/.../webapp.d.ts(25,23): error TS1540: A 'namespace' declaration should not be declared using the 'module' keyword. Please use the 'namespace' keyword instead.
.meteor/local/types/.../webapp.d.ts(72,23): error TS1540: A 'namespace' declaration should not be declared using the 'module' keyword. Please use the 'namespace' keyword instead.

Workaround

Adding "skipLibCheck": true to tsconfig.json suppresses the errors, but this also disables type-checking for all other .d.ts files.

Suggested fix

Replace declare module with declare namespace in the type generation code for mongo and webapp packages.

Environment

  • Meteor 3.3.2
  • TypeScript 6.0.2

Contributor Guide

Tech Stack
typescriptjavascriptnodejs
Domain
toolingbuild system
Issue Type
bug
SchwierigkeitGeschätzte Implementierungsschwierigkeit für neue Contributors, von 1 für sehr kleine Änderungen bis 5 für Expertenarbeit.
2
Geschätzte ZeitEin grober Zeitrahmen, um zu recherchieren, zu implementieren, zu testen und einen Pull Request vorzubereiten.
under 1 hour
AktivitätsstatusWie verfügbar das Issue gerade wirkt: frisch, aktiv, stale, blockiert oder wartet auf Maintainer-Input.
fresh
KlarheitWie klar das Issue die erwartete Änderung, Akzeptanzkriterien und den nächsten Schritt erklärt.
clear
Voraussetzungen
TypeScriptMeteor development setup
EinsteigerfreundlichkeitEin Score von 1 bis 100, der schätzt, wie zugänglich dieses Issue für First-Time Contributors ist.
80
Research-Richtung
The issue describes a problem where generated .d.ts files use 'declare module' instead of 'declare namespace', causing errors in TypeScript 6. The suggested fix is to replace 'declare module' with 'declare namespace' in the type generation code. The affected files are in `.meteor/local/types/node modules/package types/` for the mongo and webapp packages. To implement the fix, locate the code that generates these .d.ts files in the Meteor repository (likely in the packages/mongo and packages/webapp directories) and perform the replacement. No comments or linked PRs exist, so this issue is unclaimed.