Type 'N' cannot be used to index type 'NumberToString' with TS 2.5.2 when importing Ramda

[alshain]

According to the manual, I've installed the typings with npm install --save-dev types/npm-ramda#dist

import * as R from 'ramda';

leads to the following error:

node_modules@types\ramda\src\view.d.ts
(90,12): error TS2536: Type 'N' cannot be used to index type 'NumberToString'.

packge.json excerpt:

"@types/ramda": "github:types/npm-ramda#dist",
"ramda": "^0.24.1",
"typescript": "^2.5.2"

[alshain]

Using "@types/ramda": "^0.24.9" instead, as generated by a regular npm install -S @types/ramda works fine with said code and TS 2.5.2

[KiaraGrouwstra]

Sounds like microsoft/TypeScript#15768, which I imagine should have made it in. Bit surprised, think @ikatyang had tried with 2.5.2 at #224.

[ikatyang]

I'm not sure why the error did not occur in the build, but I already have a fix for it in #233 though it'll cause TS 2.4 to error since the bug fix was in TS 2.5.

I'll port them to master later.

[ikatyang]

@alshain

The definition from npm install -S @types/ramda is currently maintained by DefinitelyTyped, and we're trying to generate DT compatible definitions so as to put them on DT.

[alshain]

@ikatyang Thanks for the link, I was wondering why Ramda linked here rather than to DefinitelyTyped.

[KiaraGrouwstra]

@alshain: it's because the definitions over there aren't actively maintained (not to mention it's tougher to discuss issues without a distinct repo); it's been the intention to sync the types here back to there, but it hadn't happened yet so far.

[jiayihu]

I'm having the same issue, is there any workaround available for the moment?

[ikatyang]

@jiayihu

It should be fixed in TS v2.5+, if you're talking about prior to v2.5, you have to add skipLibCheck: true to your tsconfig.json.

[jiayihu]

Thanks for the reply, I confirm it has been solved by updating TS to 2.5.3!

[bstro]

I'm on typescript 2.5.3 using "@types/ramda": "types/npm-ramda#dist" and I get the following error:

/Users/bstro/foo/node_modules/@types/ramda/src/view.d.ts (89,10): error TS2536: Type 'N' cannot be used to index type 'U'.

skipLibCheck: true fixes it.

[ikatyang]

@bstro

It shouldn't get errors with default config. Can you share some steps to reproduce? I'm not able to reproduce the issue, here's how I tested:

mkdir ramda-test
cd ramda-test
yarn add types/npm-ramda#dist typescript --force
echo '{"compilerOptions": {"strict": true}}' > tsconfig.json
echo 'import * as R from "ramda"; R.view(R.lensIndex(0), [0, 1, 2]);' > test.ts
yarn tsc -p tsconfig.json