always bundle devDependencies

.changeset/selfish-cougars-kick.md

@@ -0,0 +1,5 @@
+---
+'create-svelte': patch
+---
+
+Update default Vite config so that devDependencies are always bundled

packages/create-svelte/shared/vite.config.ts

@@ -1,9 +1,19 @@
+import fs from 'fs';
 import { sveltekit } from '@sveltejs/kit/vite';
 import type { UserConfig } from 'vite';
 
+const pkg = JSON.parse(fs.readFileSync('package.json', 'utf-8'));
+
 /** @type {import('vite').UserConfig} */
 const config: UserConfig = {
-	plugins: [sveltekit()]
+	plugins: [sveltekit()],
+
+	ssr: {
+		// bundle everything in devDependencies, so our
+		// deployment only needs prod dependencies
+		external: Object.keys(pkg.dependencies ?? {}),
+		noExternal: true
+	}
 };
 
 export default config;

packages/create-svelte/templates/default/src/lib/form.ts

@@ -26,7 +26,7 @@ import { invalidate } from '$app/navigation';
  *     response: Response;
  *     form: HTMLFormElement;
  *   }) => void;
- * }} [opts]
+ * }} opts
  */
 export function enhance(
 	form: HTMLFormElement,