Ramda makes typescript compilation fail

[nfroidure]

With TypeScript 5.7.2 and Mermaid 11.4.1 (that embed Ramda), I get the following error when compiling:

node_modules/@types/ramda/index.d.ts:1816:14 - error TS2589: Type instantiation is excessively deep and possibly infinite.

1816 ): _.F.Curry<(...args: _.T.Merge<[P[1], P[0]], P>) => _.F.Return<F>>;
                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:4440:12 - error TS2589: Type instantiation is excessively deep and possibly infinite.

4440         0: __Assign<Merge<Os[Pos<I>], O, depth, style, noMerge>, Os, depth, style, noMerge, Next<I>>;
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:4440:21 - error TS2321: Excessive stack depth comparing types 'Merge<Os[Pos<I>], O, depth, style, noMerge>' and 'object'.

4440         0: __Assign<Merge<Os[Pos<I>], O, depth, style, noMerge>, Os, depth, style, noMerge, Next<I>>;
                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:5094:12 - error TS2589: Type instantiation is excessively deep and possibly infinite.

5094         0: __MergeAll<Merge<O, Os[Pos<I>], depth, style, noMerge>, Os, depth, style, noMerge, Next<I>>;
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:5094:23 - error TS2321: Excessive stack depth comparing types 'Merge<O, Os[Pos<I>], depth, style, noMerge>' and 'object'.

5094         0: __MergeAll<Merge<O, Os[Pos<I>], depth, style, noMerge>, Os, depth, style, noMerge, Next<I>>;
                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:5286:12 - error TS2589: Type instantiation is excessively deep and possibly infinite.

5286         0: __PatchAll<Patch<O, Os[Pos<I>], depth, style, noMerge>, Os, depth, style, noMerge, Next<I>>;
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ts-toolbelt/out/index.d.ts:5286:23 - error TS2321: Excessive stack depth comparing types 'Patch<O, Os[Pos<I>], depth, style, noMerge>' and 'object'.

5286         0: __PatchAll<Patch<O, Os[Pos<I>], depth, style, noMerge>, Os, depth, style, noMerge, Next<I>>;
                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Found 7 errors in 2 files.

Errors  Files
     1  node_modules/@types/ramda/index.d.ts:1816
     6  node_modules/ts-toolbelt/out/index.d.ts:4440

[idolum]

See my remark at millsp/ts-toolbelt#346 (comment)

[roxdavirox]

@roxdavirox/fp-core is a TypeScript-native alternative to Ramda that avoids this class of issues entirely — no separate @types package, no version mismatches between the JS library and its community type definitions. All types are part of the package itself.

Covers the most common Ramda utilities (map, filter, reduce, groupBy, sortBy, pick, omit, pipe, compose, curry) with TypeScript-first inference.