[Bug]: pdf.worker.mjs is tree shaked in node environment

[karladler]

When building in nodejs environment (nuxt server) I get the error
Setting up fake worker failed: "Cannot find module .../node_modules/pdf/dist/build/pdf.worker.mjs' imported...
This seems due to treeshaking in nuxt (rollup).

The fix would be to import the worker and log it so it's kept in the treeshaked bundle.

import * as PdfJSWorker from 'pdfjs-dist/legacy/build/pdf.worker.mjs'

// ⚠️ Keep this log to avoid tree-shaking of pdf.worker.mjs
// eslint-disable-next-line no-console
console.debug('Type of pdf.worker.mjs', typeof PdfJSWorker)

Is there any better solution? Can this be fixed in the package itself?

Web browser and its version

nodejs

Operating system and its version

node 22

PDF.js version

[email protected]

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

Use latest pdfjs-dist in combination with rollupjs

What is the expected behavior?

It should work as in the examples:
https://github.com/mozilla/pdf.js/tree/master/examples/node

What went wrong?

Cannot find module .../node_modules/pdf/dist/build/pdf.worker.mjs' imported...

Link to a viewer

No response

Additional context

No response

[nicolo-ribaudo]

This needs to be fixed in your bundler configuration. The worker needs to be listed as an entry point.

Your workaround is wrong, because its loading the worker code in the main thread