[Web] Bundling a package that uses ONNX in a web worker - no error, but doesn't create session / load model

Describe the issue

I'm working on a web package that should use ONNX web from within a web worker.

I have a pnpm monorepo that contains the package and a demo project. The package contains the worker, which is bundled, and then instantiated from the demo project. Both the package and the demo project use vite.

In the worker, I run:

  console.log(`Worker: Loading model from ${modelUrl}...`)

  const session = await ort.InferenceSession.create(modelUrl, {
    executionProviders: ['wasm'],
  })

  console.log('Worker: Model loaded successfully.', session)

No error is thrown, and in the network tab I see that it is actually fetching the wasm correctly. But only the first message is logged, the second one is never reached. I also see no network request for this modelUrl.

To reproduce

Here's a minimal example of the monorepo described above.
https://github.com/Andonvr/onnx-package-test

Urgency

ONNX Runtime Installation

Released Package

ONNX Runtime Version or Commit ID

1.24.2

Execution Provider

'wasm'/'cpu' (WebAssembly CPU)