In Webpack 5, the [recommended way](https://webpack.js.org/guides/web-workers/) to create a web worker is

```ts
new Worker(new URL('./worker.js', import.meta.url));
```

Could we update\* the [`pdfjs-dist/webpack` entrypoint](https://github.com/mozilla/pdfjs-dist/blob/master/webpack.js) to use this syntax instead of the legacy `worker-loader`? One of the Webpack contributors told me that `worker-loader` uses "magic" and can cause issues.

\* To maintain compatibility with people still using Webpack 4, we should probably introduce a new entrypoint called `pdfjs-dist/webpack5` (or something like that) rather than changing the existing entrypoint.

Can attempt a PR if you would like.

Closely-related: https://github.com/mozilla/pdf.js/issues/15302


const VERSION = getVersionJSON().version;
  const reason = process.env.PDFJS_UPDATE_REASON;
  safeSpawnSync("git", ["init"], { cwd: GH_PAGES_DIR });
  safeSpawnSync("git", ["remote", "add", "origin", REPO], {
    cwd: GH_PAGES_DIR,
  });
  safeSpawnSync("git", ["add", "-A"], { cwd: GH_PAGES_DIR });
  safeSpawnSync(
    "git",
    [
      "commit",
      "-am",
      "gh-pages site created via gulpfile.js script",
      "-m",
      "PDF.js version " + VERSION + (reason ? " - " + reason : ""),
    ],
    { cwd: GH_PAGES_DIR }
  );
  safeSpawnSync("git", ["branch", "-m", "gh-pages"], { cwd: GH_PAGES_DIR });
  console.log();
  console.log("Website built in " + GH_PAGES_DIR);
  done();
}
gulp.task(
  "web",
  gulp.series(
    "generic",
    "generic-legacy",
    "jsdoc",