Specifying default <script> language

[JorensM]

Is your feature request related to a problem? Please describe. Problem is that I have to type out <script lang="ts"> for each component instead of just <script>, even though my project consists of exclusively TypeScript files.

Describe the solution you'd like I believe this was a feature in earlier versions, but I'd like a configuration option that would allow you to specify the default language for <script> tags so you don't have to explicitly specify it each time.

How important is this feature to you? Not too important, just a minor inconvenience.

[dummdidumm]

We did this a long time ago but it turned out to be a mistake:

• all tooling needs to be aware of the default language some way or the other, leading to either many duplicate definitions, or hacks to know the value
• syntax highlighting of TS and JS files is slightly different, and editors like VS Code pick the syntax highlighting based on tokens (in this case looking for lang="ts"). If there's a default language, then that would no longer be possible
• in Svelte 5, lang="ts" is also used by the compiler itself to know whether or not the language is TS

Therefore closing.