ts-loader and typescript plugins?

[NickDarvey]

Expected Behaviour

ts-loader executes typescript plugins.

Actual Behaviour

ts-loader does not execute typescript plugins.

Steps to Reproduce the Problem

1. Clone this repo
2. Open the folder in VS Code
3. Install the folder's recommended extensions
4. Restart VS Code (probably)
5. Open main.ts and note that importing MyProps is valid because of the typescript-svelte-plugin and an enabled setting. (Mentioned in TypeScript Plugin sveltejs/language-tools#580 (comment))
6. Run npm run build and note it fails even though the plugin is configured:

   [tsl] ERROR in C:\Users\nickd\source\repos\typescript-svelte-plugin-with-ts-loader\src\main.ts(2,15)
        TS2614: Module '"*.svelte"' has no exported member 'MyProps'. Did you mean to use 'import MyProps from "*.svelte"' instead?
   

Location of a Minimal Repository that Demonstrates the Issue.

https://github.com/NickDarvey/typescript-svelte-plugin-with-ts-loader

[johnnyreilly]

If I read this link right, it seems this is more for editors than for a build tool like webpack

List of language service plugins to run inside the editor.

Language service plugins are a way to provide additional information to a user based on existing TypeScript files. They can enhance existing messages between TypeScript and an editor, or to provide their own error messages.

[NickDarvey]

It does sound like that. Perhaps I misunderstood the intent of the plugin and there's a different fix to the original issue I ran in to.

sveltejs/language-tools#580 (comment)

[dummdidumm]

TypeScript maintainers explicitly state somewhere that plugins are for IDE only and are not executed when running TSC from the command line. So this is works as designed and this issue can be closed in my opinion.

[NickDarvey]

Closing because this is not the intended use of the plugin anyway:
sveltejs/svelte#5817 (comment)