[Bug]: Browserslist target cannot parse shared config

[honzahruby]

System Info

rspack 1.4.0

Details

After upgrading rspack from 1.3.11 to 1.4.0, we're getting this browserslist error:

Error: No browserslist config found to handle the 'browserslist' target.

We have a monorepo setup that exports a shared config as @company/browserslist-config/b2b.

We use the browserslist field in the app package.json to use the shared setting

"browserslist": [
    "extends @company/browserslist-config/b2b"
],

and rspack config simply specifies

target: 'browserslist'

This worked fine in the previous versions of rspack but stopped working after the upgrade to 1.4

Reproduce link

No response

Reproduce Steps

1. create a project using rspack 1.4.0
2. set target: 'browserslist' in rspack config
3. use extends in browserslist query

[chenjiahan]

Thank you for the feedback, I will try to fix this.

[honzahruby]

@chenjiahan thanks, let me know if you need more info or a repro repo

[chenjiahan]

Unfortunately, I cannot reproduce this issue:

Can you provide a minimal reproduction? ❤️

[honzahruby]

Yeah, so it was about using the nested config - extends @company/browserslist-config/b2b - which is mapped through the exports field in the browserslist-config package.json.

I made it work now with BROWSERSLIST_DANGEROUS_EXTEND=1, but I'm not entirely sure why it worked fine without this before.

Feel free to close this issue if there's nothing to resolve on your side.

[chenjiahan]

Thanks for pointing this out. I think the root of the problem is that Rspack switched from browserslist to browserslist-rs, which may have some differences with the JS version.