From 1c6ebc93c8d12bd7a8874153f4bbd2f35c32be20 Mon Sep 17 00:00:00 2001
From: Simon Holthausen <simon.holthausen@vercel.com>
Date: Thu, 6 Feb 2025 13:38:22 +0100
Subject: [PATCH] fix: hydrate `href` that is part of spread attributes

We had some duplicated and buggy code, removing it fixes #15120
---
 .changeset/wicked-apes-sin.md                               | 5 +++++
 .../svelte/src/internal/client/dom/elements/attributes.js   | 6 +-----
 .../samples/repair-mismatched-a-href/_expected.html         | 2 +-
 .../hydration/samples/repair-mismatched-a-href/main.svelte  | 1 +
 4 files changed, 8 insertions(+), 6 deletions(-)
 create mode 100644 .changeset/wicked-apes-sin.md

diff --git a/.changeset/wicked-apes-sin.md b/.changeset/wicked-apes-sin.md
new file mode 100644
index 000000000000..f40294ddff11
--- /dev/null
+++ b/.changeset/wicked-apes-sin.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: hydrate `href` that is part of spread attributes
diff --git a/packages/svelte/src/internal/client/dom/elements/attributes.js b/packages/svelte/src/internal/client/dom/elements/attributes.js
index 308f23d34000..4a0f0cea0e00 100644
--- a/packages/svelte/src/internal/client/dom/elements/attributes.js
+++ b/packages/svelte/src/internal/client/dom/elements/attributes.js
@@ -419,11 +419,7 @@ export function set_attributes(
 				// @ts-ignore
 				element[name] = value;
 			} else if (typeof value !== 'function') {
-				if (hydrating && (name === 'src' || name === 'href' || name === 'srcset')) {
-					if (!skip_warning) check_src_in_dev_hydration(element, name, value ?? '');
-				} else {
-					set_attribute(element, name, value);
-				}
+				set_attribute(element, name, value);
 			}
 		}
 		if (key === 'style' && '__styles' in element) {
diff --git a/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/_expected.html b/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/_expected.html
index 2f5b652facf3..e1076af2ec8b 100644
--- a/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/_expected.html
+++ b/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/_expected.html
@@ -1 +1 @@
-<!--[--><a href="/foo">foo</a><!--]-->
+<!--[--><a href="/foo">foo</a> <a href="/foo">foo</a><!--]-->
diff --git a/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/main.svelte b/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/main.svelte
index be01d05f8e7d..3f0c98801637 100644
--- a/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/main.svelte
+++ b/packages/svelte/tests/hydration/samples/repair-mismatched-a-href/main.svelte
@@ -3,3 +3,4 @@
 </script>
 
 <a href={browser ? '/foo' : '/bar'}>foo</a>
+<a {...{href: browser ? '/foo' : '/bar'}}>foo</a>