fix: skip is_standalone optimisation for dynamic components (#12767)

* fix: skip `is_standalone` optimisation for dynamic components

* changeset

Author: Rich-Harris

.changeset/nice-bottles-greet.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: skip `is_standalone` optimisation for dynamic components

packages/svelte/src/compiler/phases/3-transform/utils.js

@@ -283,6 +283,7 @@ export function clean_nodes(
 			((first.type === 'RenderTag' && !first.metadata.dynamic) ||
 				(first.type === 'Component' &&
 					!state.options.hmr &&
+					!first.metadata.dynamic &&
 					!first.attributes.some(
 						(attribute) => attribute.type === 'Attribute' && attribute.name.startsWith('--')
 					))),

packages/svelte/tests/runtime-runes/samples/member-expression-component/Row.svelte

@@ -0,0 +1,5 @@
+<script>
+	let { id } = $props();
+</script>
+
+<span>{id}</span>

packages/svelte/tests/runtime-runes/samples/member-expression-component/_config.js

@@ -0,0 +1,16 @@
+import { flushSync } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	html: `<button>flip</button> <span>0</span><span>1</span><span>2</span>`,
+
+	async test({ assert, target }) {
+		const button = target.querySelector('button');
+
+		flushSync(() => button?.click());
+		assert.htmlEqual(
+			target.innerHTML,
+			`<button>flip</button> <span>2</span><span>1</span><span>0</span>`
+		);
+	}
+});

packages/svelte/tests/runtime-runes/samples/member-expression-component/main.svelte

@@ -0,0 +1,13 @@
+<script>
+	import Row from './Row.svelte';
+
+	const items = $state([{ id: 0 }, { id: 1 }, { id: 2 }]);
+
+	const Table = { Row };
+</script>
+
+<button onclick={() => items.reverse()}> flip </button>
+
+{#each items as item (item.id)}
+	<Table.Row id={item.id} />
+{/each}