Svelte 5: compileModule

[yolk]

esbuild-svelte ignores *.svelte.js and *.svelte.ts files containing runes from svelte 5.

To compile them, we would need to:

1. Alter the default value of the include option (something like /\.svelte(\.ts|\.js)?$/)
2. Detect module files before compilation and instead of calling the compile function call compileModule from 'svelte/compiler'.

This would solve the problem for 'svelte.js' files, but not for 'svelte.ts', because sveltePreprocess only compiles svelte components. Maybe we could compile/preprocess them with esbuild before calling compileModule?

Thx!

[EMH333]

This is interesting, thank you for bringing this to my attention.

I agree with your prognosis, supporting *.svelte.js files will be straightforward. Supporting TS svelte modules will be less straightforward, however using esbuild to transform TS into JS seems like the best path.

Update: Svelte 5 appears to natively support basic TS syntax. I'm debating whether the added complexity is worth it to compile module files down to JS before running through compileModule or do we rely on folks not wanting to use any of the unsupported native features.

[woutdp]

Super excited for this! Since you mentioned TS modules might be tricky, consider supporting .svelte.js without .svelte.ts for a first iteration as that would allow some usage of esbuild-svelte with Svelte 5.

[EMH333]

Support has been released in v0.9.0