pkg.main is always parsed as a script, even if it's not

[Rich-Harris]

I would categorise this as a super-duper-edge case were it not for the fact that the offending package, @mapbox/node-pre-gyp, has around 3.3m weekly downloads.

That package's package.json contains the following:

"main": "index.html"

Unsurprisingly, this blows up: sveltejs/kit#5577 (comment).

Perhaps pkg.main should be treated as a script or asset based on the same extension logic as other files?

[styfle]

Yeah I think we could exclude .html even if explicitly defined in main.

Technically this usage is valid today if index.html is actually a JS file and Node.js will happily accept it.

But in practice that is probably not common and so we could skip the parse step.

Another alternative is to parse and fail, then ignore the warning if it ends with .html. Although that seems like something the consumer of nft can do too, like this: sveltejs/kit#6810