fix: avoid warning for non reactive property in generated root

.changeset/nasty-deers-begin.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: avoid warning for non reactive property in generated root

packages/kit/src/core/sync/write_root.js

@@ -48,7 +48,7 @@ export function write_root(manifest_data, output) {
 				${
 					isSvelte5Plus()
 						? dedent`
-							let { stores, page, constructors, components = [], form, ${levels
+							let { stores, page, constructors, components = $bindable([]), form, ${levels
 								.map((l) => `data_${l} = null`)
 								.join(', ')} } = $props();
 						`

packages/kit/test/apps/basics/test/client.test.js

@@ -1198,3 +1198,19 @@ test.describe('INP', () => {
 		expect(time).toBeLessThan(400);
 	});
 });
+
+test.describe('binding_property_non_reactive warn', () => {
+	test('warning is not thrown from the root of svelte', async ({ page }) => {
+		let is_warning_thrown = false;
+		page.on('console', (m) => {
+			if (
+				m.type() === 'warn' &&
+				m.text().includes('binding_property_non_reactive `bind:this={components[0]}`')
+			) {
+				is_warning_thrown = true;
+			}
+		});
+		await page.goto('/');
+		expect(is_warning_thrown).toBeFalsy();
+	});
+});