ReferenceError: Worker is not defined in fresh Nextjs project

Question

I'm investigating a larger issue where I am trying to import a webpacked javascript file into a NextJS project that uses Worker and keep getting ReferenceError: Worker is not defined . I've minimized it to the following:

• Create a fresh NextJS project with npx create-next-app@latest
• Inside that project, create a javascript file containing just the following line: module.exports = Worker;
• Go to pages/_app.js and try to import the file we just created in the previous step const shouldThrow = require('../myFile.js') .
• Run npm run build , should now throw ReferenceError: Worker is not defined

Why does this happen and how can I fix it?

Answer 1

If you check docs

const { Worker } = require("node:worker_threads");

console.log("W", Worker);