[fix] point at true dev entry point

Author: benmccann

.changeset/fresh-hats-tie.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] point at true dev entry point

packages/kit/src/core/create_app/index.js

@@ -33,14 +33,6 @@ export function create_app({ manifest_data, output, cwd = process.cwd() }) {
 	const base = path.relative(cwd, dir);
 
 	write_if_changed(`${dir}/manifest.js`, generate_client_manifest(manifest_data, base));
-
-	write_if_changed(
-		`${dir}/root.js`,
-		`import root from './root.svelte';
-export default root;
-`
-	);
-
 	write_if_changed(`${dir}/root.svelte`, generate_app(manifest_data, base));
 }
 

packages/kit/src/core/dev/index.js

@@ -135,9 +135,9 @@ class Watcher extends EventEmitter {
 			},
 			build: {
 				rollupOptions: {
-					// Vite needs an explicit JS entry point, so we create a root.js
-					// that simply re-exports the root.svelte file
-					input: path.resolve(`${this.dir}/generated/root.js`)
+					// Vite dependency crawler needs an explicit JS entry point
+					// eventough server otherwise works without it
+					input: path.resolve(`${this.dir}/runtime/internal/start.js`)
 				}
 			},
 			plugins: [