Using Webpack 5 for web worker loading example is broken

[kerel-fs]

🐞 Problem

While following the Getting Started guide I failed to use the native worker support introduced with Webpack 5. Following the Webpack 4 approach of loading web workers using worker-loader works though.

🗒️ Steps to reproduce

The files at kerel-fs/spectranalysis@eb1e672 contain the example project of spectroplot-js, running fine while using worker-loader. Changing ./src/easy.js#L14 from

import spectroplot_worker from 'worker-loader?filename=js/spectroplot.[hash].worker.js!spectroplot/lib/worker.js'

to

const SpectroplotWorker = Worker(new URL('spectroplot/lib/worker.js', import.meta.url))

(as described in the README) will generate the following error on page load:

Uncaught TypeError: Worker constructor: 'new' is required
    <anonymous> webpack://demo3/./src/easy.js?:21
    js http://localhost:8080/example.bundle.js:495
[...]

# For context, src/easy.js#L21:
spectroplot_worker = Worker(new URL(/* asset import */ __webpack_require__(/*! spectroplot/lib/worker.js */ "./node_modules/spectroplot/lib/worker.js"), __webpack_require__.b));

💡 Possible solutions

My first attempt at a quick fix was to just create a new Worker instance by using the new operator (#1). This does not work since spectroplot-js itself tries to create instances of workerOrUrl:

spectroplot-js/lib/spectroplot.js

Line 108 in 8117f58

renderWorker[i] = (typeof workerOrUrl === 'string') ? new Worker(workerOrUrl) : new workerOrUrl()

Probably some adjustment is needed here for the native web worker support of Webpack 5, but I didn't come of with a working patch yet.