Use defaults passed to sveltePreprocess

[jankalfus]

The official Svelte plugin for VS Code is able to load preprocess options passed to sveltePreprocess in svelte.config.js, and set up defaults correctly. It would be awesome to have support for that in this plugin as well.

For example, if one sets up typescript in svelte.config.js as the default language:

const sveltePreprocess = require("svelte-preprocess");

const preprocessOptions = {
  sourceMap: true,
  defaults: {
    script: "typescript",
  },
};

module.exports = {
  preprocess: sveltePreprocess(preprocessOptions),
};

...then typescript can be used in the script tag without having to specify lang:

<script>
  export let name: string;
</script>

This works nicely in VS Code with the official Svelte plugin:

But fails in WebStorm with this plugin (0.18.0.203):

Related issue from the VS Code plugin repository: https://github.com/sveltejs/language-tools/issues/593

[tomblachut]

Yes indeed that would be nice, thanks for raising!

[mikerourke]

@tomblachut I just wanted to chime in here and say you can probably close this issue. Svelte is deprecating the defaults option in svelte-preprocess and recommending you explicitly specify the language in the <script> tag (i.e. <script lang="ts">. Here's the message I'm seeing in my terminal:

[svelte-preprocess] Deprecation notice: using the "defaults" option is no longer recommended and will be removed in the next major version. Instead, define the language being used explicitly via the lang attribute.

By the way, thank you so much for all the great work on this plugin! I don't know what I'd do without it.

[tomblachut]

@mikerourke thanks for the info and for kind words :)

I'll rename this issue to better reflect that it's specifically about "defaults" and close it.