Handling configuration in Sapper

[benmccann]

Background

There are a number of PRs or open issues that would require providing a configuration option. We should handle configuration in a well-thought out and consistent manner.

language-tools already uses a svelte.config.js and Svelte was considering adopting it more widely.

I'm assuming that we would use a .config.js because it's inline with the existing svelte.config.js and also because it's more flexible and allows providing additional types (e.g. function)

RFC

Please see the RFC for a proposed implementation and list of Sapper PRs that might be affected

[antony]

Dare I say this sounds a bit like an RFC?

[benmccann]

RFC submitted!

[benmccann]

SvelteKit has a svelte.config.cjs file to address this