PDFLoader not working

[neebdev]

[UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "UnknownErrorException: The browser/environment lacks native support for critical functionality used by the PDF.js library (e.g. Path2D and/or ReadableStream); please use a legacy-build instead.".] {
code: 'ERR_UNHANDLED_REJECTION'
}
Usage:
import { PDFLoader } from "langchain/document_loaders";
export const run = async () => {
const loader = new PDFLoader("src/sample.pdf");
const docs = await loader.load();
console.log(docs);
};
run();

[neebdev]

solved by changing const { default: mod } = await import("pdfjs-dist"); to const { default: mod } = await import("pdfjs-dist/legacy/build/pdf.js"); in document_loaders/pdf.js.

[nfcampos]

@neebdev hi, which environment are you running this on? Node? if so, which version

[neebdev]

Node v18.12.1

[felipetodev]

same error with node@18.15.0 / langchain@0.0.48 / pdfjs-dist@3.5.141

[nfcampos]

I've opened a PR that will let you customise which build of pdfjs is used, see #622

[Hormold]

Same problem on node 18.4, macos darwin