import.meta.url bug in web workers in production builds

It seems that vite doesn't properly replace import.meta.url in web workers production builds. In dev mode there is no issue

Reproducer

To reproduce run:

npm run build && npm run preview

If you open http://localhost:4173/ and then the console you should see:

As you can see vite seems to replace import.meta.url with something containing document however document is not available from web workers.

Explanation

The entrypoint main.js is as below:

const worker = new Worker(new URL('./worker.js', import.meta.url), { type: "module" });
worker.postMessage('');
worker.addEventListener('message', (msg) => {
    console.log('message', msg.data);
})

All it does setup and invoke a worker from ./worker.js:

import { getImportMetaURL } from "./get-import-meta-url";

onmessage = (e) => {
    postMessage(getImportMetaURL());
}

Which tries to post a message back that contains import.meta.url. get-import-meta-url.js is as follows:

export function getImportMetaURL() {
    return import.meta.url;
}

Why is this an issue?

It's an issue because standard ways of importing WASM modules require import.meta.url. It's also fairly common to invoke WASM code from a web worker.