fix: skip prebundling of .remote.js files (#14583)

* fix: skip prebundling of .remote.js files

* robustify

* Update packages/kit/src/exports/vite/index.js

Co-authored-by: Simon H <[email protected]>

---------

Co-authored-by: Simon H <[email protected]>

Author: Rich-Harris

.changeset/late-ways-find.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: skip prebundling of .remote.js files

packages/kit/src/exports/vite/index.js

@@ -298,6 +298,23 @@ async function kit({ svelte_config }) {
 						`${kit.files.routes}/**/+*.{svelte,js,ts}`,
 						`!${kit.files.routes}/**/+*server.*`
 					],
+					esbuildOptions: {
+						plugins: [
+							{
+								name: 'vite-plugin-sveltekit-setup:optimize',
+								setup(build) {
+									if (!kit.experimental.remoteFunctions) return;
+
+									const filter = new RegExp(
+										`.remote(${kit.moduleExtensions.join('|')})$`.replaceAll('.', '\\.')
+									);
+
+									// treat .remote.js files as empty for the purposes of prebundling
+									build.onLoad({ filter }, () => ({ contents: '' }));
+								}
+							}
+						]
+					},
 					exclude: [
 						// Without this SvelteKit will be prebundled on the client, which means we end up with two versions of Redirect etc.
 						// Also see https://github.com/sveltejs/kit/issues/5952#issuecomment-1218844057