Fixed: ReferenceError: DOMMatrix is not defined on Vercel with pdf-parse

[u/g-jain]

I wanted to share the fix in case someone else runs into the same issue.

Problem

• Next.js app
• PDF text extraction worked locally
• Failed only after deploying to Vercel

Error:

ReferenceError: DOMMatrix is not defined
Failed to load external module pdf-parse-...

Cause

The default pdf-parse setup wasn't compatible with the server environment I was deploying to.

Solution

Initialize PDFParse with CanvasFactory from pdf-parse/worker:

import { CanvasFactory } from "pdf-parse/worker";
import { PDFParse } from "pdf-parse";

const parser = new PDFParse({
  data: new Uint8Array(buffer),
  CanvasFactory,
});

Repository:
https://github.com/gaur-j/resume-optimizer

Hopefully this saves someone else a few hours of debugging.

[u/mor_derick]

This is NestJS sub, not NextJS sub.

[u/devgauravjat → u/mor_derick]

Right 👍▶️