Problem with source map generation

[romain-trotard]

Describe the bug

Hello :)

Sorry I open it again because my previous issue has been closed and I can't reopen it #4210

Again, thank you for the library 😄

Problem encountered

When trying to debug my application, I have some trouble to debug the module federation because it seems there are missing information in the sourcemaps available in the library. There is no sourcesContent so it tries to resolve the source file with the path which causes some troubles in the dev tools.

Note: In my vite reproduction, all the module federation files leads to the generated index.html

Enregistrement.de.l.ecran.2025-11-14.a.11.46.46.mov

This is due tot the fact there are null values in the sourcesContent:

Possible solutions

I see 2 possible solutions:

• not generating sourcemaps (remove the configuration of sourcemap in rollup.config.js files)
• configuring "inlineSources": true in the tsconfig.lib.json files (because the problem is due to the use of @rollup/plugin-typescript)

If you want me to do the change, I am up for it :)

Thanks

Reproduction

https://github.com/romain-trotard/federation-repro

Used Package Manager

yarn

System Info

System:
    OS: macOS 15.7.2
    CPU: (10) arm64 Apple M1 Pro
    Memory: 191.41 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.21.1 - /Users/romain.trotard/.volta/tools/image/node/22.21.1/bin/node
    Yarn: 1.19.0 - /Users/romain.trotard/.volta/tools/image/yarn/1.19.0/bin/yarn
    npm: 10.9.4 - /Users/romain.trotard/.volta/tools/image/node/22.21.1/bin/npm
    pnpm: 10.12.4 - /Users/romain.trotard/.volta/bin/pnpm
  Browsers:
    Chrome: 142.0.7444.60
    Firefox: 144.0.2
    Safari: 18.6

Validations

• Read the docs.
• Read the common issues list.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Module federation issue and not a framework-specific issue.
• The provided reproduction is a minimal reproducible example of the bug.

[ScriptedAlchemy]

Will be replacing all build tooling in repo. Should solve the endless problems rollup has caused