From 7e762cf481b06a8eeddcf6f1cea11d741c01a2dc Mon Sep 17 00:00:00 2001
From: Paolo Ricciuti <ricciutipaolo@gmail.com>
Date: Fri, 31 May 2024 10:56:38 +0200
Subject: [PATCH] fix: reevaluate namespace in slots (#11849)

Closes #11847
---
 .changeset/shiny-months-tease.md                         | 5 +++++
 packages/svelte/src/compiler/phases/3-transform/utils.js | 3 ++-
 .../tests/runtime-legacy/samples/slot-svg/_config.js     | 9 +++++++++
 .../tests/runtime-legacy/samples/slot-svg/main.svelte    | 7 +++++++
 .../tests/runtime-legacy/samples/slot-svg/points.svelte  | 3 +++
 5 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/shiny-months-tease.md
 create mode 100644 packages/svelte/tests/runtime-legacy/samples/slot-svg/_config.js
 create mode 100644 packages/svelte/tests/runtime-legacy/samples/slot-svg/main.svelte
 create mode 100644 packages/svelte/tests/runtime-legacy/samples/slot-svg/points.svelte

diff --git a/.changeset/shiny-months-tease.md b/.changeset/shiny-months-tease.md
new file mode 100644
index 0000000000..a4f3413cd4
--- /dev/null
+++ b/.changeset/shiny-months-tease.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: reevaluate namespace in slots
diff --git a/packages/svelte/src/compiler/phases/3-transform/utils.js b/packages/svelte/src/compiler/phases/3-transform/utils.js
index 54ce062ad0..1e5ef8dce1 100644
--- a/packages/svelte/src/compiler/phases/3-transform/utils.js
+++ b/packages/svelte/src/compiler/phases/3-transform/utils.js
@@ -176,7 +176,8 @@ export function infer_namespace(namespace, parent, nodes) {
 			parent.type === 'Component' ||
 			parent.type === 'SvelteComponent' ||
 			parent.type === 'SvelteFragment' ||
-			parent.type === 'SnippetBlock'
+			parent.type === 'SnippetBlock' ||
+			parent.type === 'SlotElement'
 		) {
 			const new_namespace = check_nodes_for_namespace(nodes, 'keep');
 			if (new_namespace !== 'keep' && new_namespace !== 'maybe_html') {
diff --git a/packages/svelte/tests/runtime-legacy/samples/slot-svg/_config.js b/packages/svelte/tests/runtime-legacy/samples/slot-svg/_config.js
new file mode 100644
index 0000000000..de80ebe351
--- /dev/null
+++ b/packages/svelte/tests/runtime-legacy/samples/slot-svg/_config.js
@@ -0,0 +1,9 @@
+import { ok, test } from '../../test';
+
+export default test({
+	async test({ assert, target }) {
+		const circle = target.querySelector('circle');
+		ok(circle);
+		assert.equal(circle.namespaceURI, 'http://www.w3.org/2000/svg');
+	}
+});
diff --git a/packages/svelte/tests/runtime-legacy/samples/slot-svg/main.svelte b/packages/svelte/tests/runtime-legacy/samples/slot-svg/main.svelte
new file mode 100644
index 0000000000..faf271a00f
--- /dev/null
+++ b/packages/svelte/tests/runtime-legacy/samples/slot-svg/main.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Points from './points.svelte';
+</script>
+
+<svg>
+	<Points />
+</svg>
diff --git a/packages/svelte/tests/runtime-legacy/samples/slot-svg/points.svelte b/packages/svelte/tests/runtime-legacy/samples/slot-svg/points.svelte
new file mode 100644
index 0000000000..eb580cf793
--- /dev/null
+++ b/packages/svelte/tests/runtime-legacy/samples/slot-svg/points.svelte
@@ -0,0 +1,3 @@
+<slot>
+	<circle cx={10} cy={10} r={5} />
+</slot>