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Can't augment UMD namespace #12106
Description
This is related to #12030.
TypeScript Version: nightly (@2.1.0-dev.20161108)
Code
// @Filename: /types/lib/index.d.ts
declare var lib: lib.Static;
export as namespace lib;
export = lib;
declare namespace lib {
interface Static {
stat(): void;
}
}
// @Filename: /types/lib-extender/index.d.ts
declare namespace lib {
export function fn(): void;
}
// @Filename: /src/a.ts
let bar: lib.Static;
lib.fn();
// @Filename: /tsconfig.json
{
"compilerOptions": {
"baseUrl": ".",
"paths": {
"*": ["types/*"]
}
}
}Expected behavior:
No errors.
Actual behavior:
error TS2694: Namespace '"/types/lib/index".lib' has no exported member 'Static'.
Attempting to augment a UMD namespace appears to just overwrite it.
Activity
mattmccutchen commentedon Aug 12, 2018
If I may piggyback on this issue report, attempting to augment the external module that underlies the UMD global doesn't work either. Same example as above except
types/lib-extender/index.d.tscontains: