Module resolution: extensions are not included in path resolution

[vdegenne]

Demo Repo

https://github.com/ghost/myrepo

Which of the following problems are you reporting?

Something else more complicated which I'll explain in more detail

Demonstrate the defect described above with a code sample.

A video is worth a thousand words

screencast_2025-11-01_18-36-25.mp4

The .js part there is lost

Run tsc --showConfig and paste its output here

private project,
happens everywhere though.

Run tsc --traceResolution and paste its output here

private

Paste the package.json of the importing module, if it exists

private

Paste the package.json of the target module, if it exists

private

Any other comments can go here

The issue appears both on vscode, and in nvim using mason/lsp/tsserver

[RyanCavanaugh]

We need a concrete way to repro this. It's entirely possible this is due to a configuration problem.

[vdegenne]

@RyanCavanaugh Can I make a repo and you guys workspace it? Would this work?

[RyanCavanaugh]

Yeah, if we can clone locally that's perfect