Difference between .swcrc and tsconfig.json

[alebas1]

Hello, I am currently building an api with fastify and typescript just for fun.

I am new to typescript, but I want my dev exp to be as good as possible and I'm trying to use the best and fastest tools.

First of all, is swc meant for replacing tsc?

I am used to set some parameters in my tsconfig like declaration (to generate .d.ts files) and noUncheckedIndexedAccess. But these are not available (yet?) in .swcrc.

In a project, am I supposed to use swc WITH tsc ?

Am I supposed to have .swcrc and tsconfig.json both present?

If yes, how do I know I don't have useless configs
(e.g with "sourceMaps": true in .swcrc and "sourceMap": false in tsconfig.json, the tsconfig.json one will get ignored)

And how do I bring my declaration and noUncheckedIndexedAccess parameters to swc compilation?

Thanks a lot!

[kwonoj]

Those are tsc specific options that swc doesn't support. Swc provides transpilation features but does not offer type checking from typescript compiler. For those you need to keep using tsc.