From 71c1227513f5182abbcd05b31ca9294f6f5e4d9e Mon Sep 17 00:00:00 2001
From: Paolo Ricciuti <ricciutipaolo@gmail.com>
Date: Tue, 3 Sep 2024 13:21:41 +0200
Subject: [PATCH] fix: remove unnecessary update assignments (#13113)

Fixes #13111
---
 .changeset/itchy-oranges-behave.md                          | 5 +++++
 .../phases/3-transform/client/visitors/RegularElement.js    | 2 +-
 .../samples/empty-class-attribute-template/_config.js       | 6 ++++++
 .../samples/empty-class-attribute-template/main.svelte      | 2 ++
 4 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/itchy-oranges-behave.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/main.svelte

diff --git a/.changeset/itchy-oranges-behave.md b/.changeset/itchy-oranges-behave.md
new file mode 100644
index 0000000000..47ec3e2a26
--- /dev/null
+++ b/.changeset/itchy-oranges-behave.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: remove unnecessary update assignments
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/RegularElement.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/RegularElement.js
index 6e9ddc0750..f65e600e74 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/RegularElement.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/RegularElement.js
@@ -248,8 +248,8 @@ export function RegularElement(node, context) {
 								: `="${value === true ? '' : escape_html(value, true)}"`
 						}`
 					);
-					continue;
 				}
+				continue;
 			}
 
 			const is = is_custom_element
diff --git a/packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/_config.js b/packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/_config.js
new file mode 100644
index 0000000000..e7ec12dfd6
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/_config.js
@@ -0,0 +1,6 @@
+import { ok, test } from '../../test';
+import { flushSync } from 'svelte';
+
+export default test({
+	html: `<div></div><div></div>`
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/main.svelte b/packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/main.svelte
new file mode 100644
index 0000000000..078d802c64
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/empty-class-attribute-template/main.svelte
@@ -0,0 +1,2 @@
+<div class=""></div>
+<div class=""></div>
\ No newline at end of file