I am having an easily reproducible error with the npm library @capacitor-community/apple-sign-in.
You can reproduce by running:
npm create svelte@latest my-app
cd my-app
npm install
npm i @capacitor-community/apple-sign-in
Then add usage of @capacitor-community/apple-sign-in such as in src/routes/Header.svelte.
Then, npm run build will reproduce the failure.
The error is SyntaxError: Cannot use import statement outside a module.
This can also be reproduced by cloning my demo repo and npm run build.
The plugin seems to not have this issue with create-react-app apps, so it seems to be an issue with how the build is happening for default svelte apps.
I am guessing this can be fixed using babel, esbuild, or vite features, so I am reaching out to stack overflow hoping to find a workaround.
I've also created this GitHub issue: https://github.com/capacitor-community/apple-sign-in/issues/108