[GitHub] [arrow] hzuo commented on issue #12663: [TS] Typescript compatibility

[GitBox <gi...@apache.org>]

hzuo commented on issue #12663:
URL: https://github.com/apache/arrow/issues/12663#issuecomment-1088244575

   The errors you're seeing are due to the fact that your tsconfig is different than the one used by this project.
   
   It looks like your tsconfig has [noUncheckedIndexedAccess](https://www.typescriptlang.org/tsconfig#noUncheckedIndexedAccess) turned on, which adds a `| undefined` to every index access.
   
   One way to fix this is to have a tsconfig that is strictly looser than the one used in this repo.
   
   However, almost always that isn't the right solution - you don't in fact want your `tsc` to compile the TypeScript of your dependencies. Rather your dependencies should publish pre-compiled *.js and *.d.ts files and your tsc should leave them untouched (other than checking that your code is compatible with the *.d.ts declarations).
   
   That's exactly what `apache-arrow@7.0.0`, `@apache-arrow/es2015-esm@7.0.0`, etc. already do, so you should use those! `@apache-arrow/ts` should probably not be published.
   


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