Tom Walter

 Could you try putting your mouse on the part of the iframe in the image? Scroll doesn't work for me there, on both mac...

That's a way more simple example than I have in my site. Thanks for adding.

Upon further review, I've found that the minification process of parcel is where the error occurs. It uses Terser for this and it breaks when trying to minify the index.es.js...

Hey, I fixed it by turning off minimisation in Parcel 1 and doing it with a newer version of Terser after asset generation. In a newer project I was able...