Need clarification on createClassComponent(), asClassComponent() and legacy.componentApi compiler option

[webJose]

Hello, everyone.

I am trying to work with the single-spa team to upgrade the single-spa-svelte package so it can mount and unmount Svelte v5 components. The process is arduous and as a faster route, one maintainer asked me about the use of legacy.componentApi instead of trying to make a full Svelte v5 conversion.

Well, I don't understand very well about it when I read about createClassComponent(), asClassComponent() and legacy.componentApi compiler option in this Svelte document. Is there any more detailed documentation available?

Basically, I need enough information to be able to take a decision on how to make single-spa-svelte work for both v4 and v5 components.

The documentation page shows how to use createClassComponent(), but there are no details about the other options.

Any explanations around these new API will be very helpful. Thanks!

[webJose]

@Rich-Harris My apologies for mentioning directly. Your name is the only one I know from the Svelte team. If you could help me out here, would be highly appreciated. Thank you!