svelte field in package.json is deprecated

[timothycohen]

Just upgraded an app to SvelteKit 2 and receiving this error:

[vite-plugin-svelte] WARNING: The following packages have a svelte field in their package.json but no exports condition for svelte.

svelte-crop-window@0.2.0

Please see https://github.com/sveltejs/vite-plugin-svelte/blob/main/docs/faq.md#missing-exports-condition for details.

Using the svelte field in package.json to point at .svelte source files is deprecated and you must use a svelte export condition. vite-plugin-svelte 3 still resolves it as a fallback, but in a future major release this is going to be removed and without exports condition resolving the library is going to fail.

Upgrading @sveltejs/package via npx svelte-migrate package should fix this.