[bug] existing module shows as not found in VS Code

[trusktr]

I marked this as [project-references?] because I started noticing these issues when I tried to switch a project to using --build. Not sure if it is actually related.

TypeScript Version: 3.8.3

Search Terms:

typescript no definition found for

Code

import './fake-process'

Expected behavior:

It should find the module, and I should be able to navigate to it in VS Code

Actual behavior:

Playground Link:

Unfortunately I don't have a public reproduction yet; it is in a private repo.

Related Issues:

Possibly related: #38494

[sheetalkamat]

We would need more information to be able to investigate if this is really bug or configuration issue.. We would need repro steps, tsserver log. You can also enable traceResolution in tsconfig to see why and where the module resolves to or doesnt resolve.

[trusktr]

Ah, that's good info. Thanks! I will see if I can get more info.

[trusktr]

@sheetalkamat I found this:

❯ npm run typecheck | grep fake
======== Resolving module './fake-process' from '/home/trusktr/src/my-project/apps/annotator/src/entry/index.ts'. ========
Loading module as file / folder, candidate module location '/home/trusktr/src/my-project/apps/annotator/src/entry/fake-process', target file type 'TypeScript'.
File '/home/trusktr/src/my-project/apps/annotator/src/entry/fake-process.ts' exist - use it as a name resolution result.
======== Module name './fake-process' was successfully resolved to '/home/trusktr/src/my-project/apps/annotator/src/entry/fake-process.ts'. ========

which seems to indicate that tsc is able to find the module, but it is only in VS Code that when I try to go to the definition it says No definition found.

[trusktr]

As for the TS Server log, I see an empty definitions response:

Info 504  [14:18:41.901] request:
    {"seq":74,"type":"request","command":"definitionAndBoundSpan","arguments":{"file":"/home/trusktr/src/my-project/apps/annotator/src/entry/index.ts","line":10,"offset":12}}
Perf 505  [14:18:41.902] 74::definitionAndBoundSpan: elapsed time (in milliseconds) 0.7504
Info 506  [14:18:41.902] response:
    {"seq":0,"type":"response","command":"definitionAndBoundSpan","request_seq":74,"success":true,"body":{"definitions":[]}}

I have two imports, and the second one works fine:

import './fake-process' // doesn't work
import './add-jquery-ui' // works

Both files are there as expected.