Question: how to lint Svelte/Typescript files, or: can svelte-check be used with a preprossor?

[rondonjon]

Luckily the VS Code plugin for svelte seems to handle my .svelte files without problems although I am using a preprocessor to handle script sections with Typescript.

I am now struggling to set up a CLI task that could do the same kind of linting inside a CI pipeline. Any ideas?

The eslint-plugin-svelte3 is no option because it doesn't yet support preprocessors.

I thought I might be able to get similar results to VS Code by running svelte-check manually, but that didn't work; I guess (if svelte-check is used at all by the plugin?) that the preprocessing is handled outside.

Piping the files through the preprocessor first doesn't seem to work either as svelte-check doesn't seem to take input from stdin.

What else could I try?

[rondonjon]

Sorry, found the solution myself.
I had attributed my <script> sections with lang="ts" as shown in some tutorials.
After changing the attribution to lang="typescript", svelte-check processed the files as expected.

[dummdidumm]

Glad to hear that 😃

PS: Guybrush Threepwood!