render method 'svelte/server' too inflexible for emails, and non-page content #14120
Description
Describe the problem
I wrote the Svelte template https://github.com/CriticalMoments/CMSaasStarter and we are migrating it to Svelte 5.
One thing we use .svelte files for email templates for our mailer. I know it's not the intended use of svelte, but it seems weird to add a second templating system in a svelte project.
We use one template for plaintext and one for html of each email. Both worked fine in svelte 4 using Component.render. Both now have issues in svelte 5.
- plaintext emails are now injecting HTML comments like
<!--[-->and<!---->which I need to strip manually - HTML emails are logging warnings of
node_invalid_placement_ssr: '<html>'because the email templates include html tags.
Describe the proposed solution
Maybe a "raw" option on the new render method in 'svelte/server'? I'm open to any fix though.
If this is explicitly out of scope we could move to another template system, but again, would love to not have 2 in one project.
Importance
nice to have