TypeError: A dynamic import callback was invoked without --experimental-vm-modules in pdf2png

[brukri]

The Error

I get the following runtime error in a CJS node.js (v22.12.0) micro service:

TypeError: A dynamic import callback was invoked without --experimental-vm-modules
    at importModuleDynamicallyCallback (node:internal/modules/esm/utils:264:11)
    at pdf2png (.../node_modules/.pnpm/pdf-visual-diff@0.14.0/node_modules/pdf-visual-diff/src/pdf2png/pdf2png.ts:74:27)
    at compareWithSnapshot (.../node_modules/.pnpm/pdf-visual-diff@0.14.0/node_modules/pdf-visual-diff/src/compare-pdf-to-snapshot.ts:223:31)
    at comparePdfToSnapshot (.../node_modules/.pnpm/pdf-visual-diff@0.14.0/node_modules/pdf-visual-diff/src/compare-pdf-to-snapshot.ts:150:12)
    at comparePdfs (.../node/document-generation-service/src/testutils/compare-pdfs.ts:14:26)
    at generate-registration-pdf.test.ts:56:7

It seems that the function pdf2png in pdf2png.ts does the following dynamic import:
const { getDocument } = await import('pdfjs-dist/legacy/build/pdf.mjs');

According to my understanding dynamic import aren't supported in CJS or how should I use the library in a CJS setup?

[moshensky]

There is a very basic example here: https://github.com/moshensky/pdf-visual-diff/tree/master/examples/cjs_sample. Nevertheless the only option might be adding --experimental-vm-modules argument when invoking Node.js.
Please note that an upstream dependency pdfjs-dist was updated not long ago to ESM so there aren't many options.

[moshensky]

I am closing this issue for now, but feel free to reopen it if needed.