How to use path aliases

[muco-rolle]

I would like to use absolute path aliases but couldn't figure out how to set it up with this project

I would like a path like this:

import { formatNumber } from "../../../utils"

be like this:

import { formatNumber } from "@utils"

[egoist]

using "paths" in tsconfig.json should work

[hampuskraft]

@egoist I get Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@app/constants' using tsup with path aliases. I'll gladly provide a reproducible example if necessary, but you can try it out with a minimal tsconfig.json, adding something like:

{
  "compilerOptions": {
    "paths": {
      "@app/*": ["./src/*"]
    }
  }
}

[egoist]

@hampuskraft maybe you forgot "baseUrl": "." in compilerOptions.

[hampuskraft]

That gives the same result, since baseUrl isn't required for relative paths (see microsoft/TypeScript#40101).

[egoist]

@hampuskraft yeah, a repro would be nice then, since I can't reproduce it locally

[hampuskraft]

@egoist Here's a repro, thanks! https://github.com/hampuskraft/tsup-paths

[egoist]

@hampuskraft I tried npx tsup src/module-b.ts --clean --format esm --sourcemap --target esnext and it works fine.

[egoist]

@hampuskraft: Error [ERR_MODULE_NOT_FOUND]: Cannot find package '@app/constants'

I guess this is a runtime error? seems to be related to #409

[egoist]

I'll close this and further updates will be added to #409.

[bhvngt]

Hi, it seems that path alias is not working for tsup-node. Since my module is targeted for node, I would prefer to not bundle them using tsup. Is there a workaround for this usecase?

[egoist]

@bhvngt does tsup work for you? it should exclude packages specified in dependencies by default

[bhvngt]

I have been using some of node's built-in packages and my project is following esm packaging standards with type set as module. This is generating a bundled up code which throws following error when I import my library from some other package.

Error: Dynamic require of "fs" is not supported.

[egoist]

@bhvngt a repo would be helpful

[bhvngt]

@egoist I have created a repo tsup-node-esm which replicates my issue.

I have realised that if I move tmp package to dependencies, it all seems to work out fine.

I do see that the code gets inlined during transpilation. Is there anyway to avoid that?