fix: join text nodes separated by comments (#13009)

.changeset/wet-donkeys-fry.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: join text nodes separated by comments

packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/fragment.js

@@ -60,9 +60,9 @@ export function process_children(nodes, initial, is_element, { visit, state }) {
 	 * @param {Sequence} sequence
 	 */
 	function flush_sequence(sequence) {
-		if (sequence.length === 1 && sequence[0].type === 'Text') {
+		if (sequence.every((node) => node.type === 'Text')) {
 			skipped += 1;
-			state.template.push(sequence[0].raw);
+			state.template.push(sequence.map((node) => node.raw).join(''));
 			return;
 		}
 

packages/svelte/tests/runtime-runes/samples/comment-separated-text/_config.js

@@ -0,0 +1,5 @@
+import { test } from '../../test';
+
+export default test({
+	html: '<div>foobar</div>'
+});

packages/svelte/tests/runtime-runes/samples/comment-separated-text/main.svelte

@@ -0,0 +1 @@
+<div>foo<!-- -->bar</div>