From 1b4c43b8e59e22c1b8185421307fbab91e573866 Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Wed, 3 Jun 2026 01:12:25 +0200
Subject: [PATCH 01/15] fix: ignore declaration tags for animation directive
 (#18366)

Fixes #18365
---
 .changeset/tangy-keys-drop.md                          |  5 +++++
 .../phases/2-analyze/visitors/shared/element.js        |  1 +
 .../animation-each-with-declaration-tag/errors.json    |  1 +
 .../animation-each-with-declaration-tag/input.svelte   | 10 ++++++++++
 4 files changed, 17 insertions(+)
 create mode 100644 .changeset/tangy-keys-drop.md
 create mode 100644 packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/errors.json
 create mode 100644 packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/input.svelte

diff --git a/.changeset/tangy-keys-drop.md b/.changeset/tangy-keys-drop.md
new file mode 100644
index 0000000000..38f0c10543
--- /dev/null
+++ b/.changeset/tangy-keys-drop.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: ignore declaration tags for animation directive
diff --git a/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/element.js b/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/element.js
index 725a4aded8..ff02dee02a 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/element.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/element.js
@@ -100,6 +100,7 @@ export function validate_element(node, context) {
 					(n) =>
 						n.type !== 'Comment' &&
 						n.type !== 'ConstTag' &&
+						n.type !== 'DeclarationTag' &&
 						(n.type !== 'Text' || n.data.trim() !== '')
 				).length > 1
 			) {
diff --git a/packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/errors.json b/packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/errors.json
new file mode 100644
index 0000000000..fe51488c70
--- /dev/null
+++ b/packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/errors.json
@@ -0,0 +1 @@
+[]
diff --git a/packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/input.svelte b/packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/input.svelte
new file mode 100644
index 0000000000..680efa7eed
--- /dev/null
+++ b/packages/svelte/tests/validator/samples/animation-each-with-declaration-tag/input.svelte
@@ -0,0 +1,10 @@
+<script>
+  function flip(){}
+</script>
+
+<div>
+  {#each [] as n (n)}
+    {const a = n}
+    <div animate:flip={a}></div>
+  {/each}
+</div>

From 94bd27953e0a5ffef80e9451b27e122d185d093f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Minh=20L=C3=AA?=
 <115204145+DucMinhNe@users.noreply.github.com>
Date: Wed, 3 Jun 2026 09:41:15 +0700
Subject: [PATCH 02/15] docs: fix invalid `rows` CSS property in {#each}
 chess-board example (#18367)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

## Problem

The `{#each}` docs page has a runnable "chess board" example whose
`<style>` block uses an invalid CSS property:

```css
.chess-board {
	display: grid;
	grid-template-columns: repeat(8, 1fr);
	rows: repeat(8, 1fr);   /* ← not a real CSS property */
	...
}
```

There is no `rows` shorthand or longhand in CSS, so this line is
silently dropped by every browser. The example clearly intends an 8×8
grid (note the matching `grid-template-columns` line directly above).

## Fix

`rows` → `grid-template-rows`. One line, in
`documentation/docs/03-template-syntax/03-each.md`. No prose changes.
---
 documentation/docs/03-template-syntax/03-each.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/documentation/docs/03-template-syntax/03-each.md b/documentation/docs/03-template-syntax/03-each.md
index 9fa699d493..5f7f494199 100644
--- a/documentation/docs/03-template-syntax/03-each.md
+++ b/documentation/docs/03-template-syntax/03-each.md
@@ -106,7 +106,7 @@ In case you just want to render something `n` times, you can omit the `as` part:
 	.chess-board {
 		display: grid;
 		grid-template-columns: repeat(8, 1fr);
-		rows: repeat(8, 1fr);
+		grid-template-rows: repeat(8, 1fr);
 		border: 1px solid black;
 		aspect-ratio: 1;
 

From e4bfc5f45af2fb5f5fe3f6ee6169b34a8a9db929 Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Wed, 3 Jun 2026 17:31:29 +0200
Subject: [PATCH 03/15] chore: bump esrap dependency (#18372)

Avoid installing the broken 2.2.10 version

Closes #18369
---
 .changeset/soft-moments-exist.md |  5 +++++
 packages/svelte/package.json     |  2 +-
 pnpm-lock.yaml                   | 12 ++++++------
 3 files changed, 12 insertions(+), 7 deletions(-)
 create mode 100644 .changeset/soft-moments-exist.md

diff --git a/.changeset/soft-moments-exist.md b/.changeset/soft-moments-exist.md
new file mode 100644
index 0000000000..71a3148afa
--- /dev/null
+++ b/.changeset/soft-moments-exist.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: bump esrap dependency
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index b7e370dc7d..45bb45c695 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -181,7 +181,7 @@
     "clsx": "^2.1.1",
     "devalue": "^5.8.1",
     "esm-env": "^1.2.1",
-    "esrap": "^2.2.9",
+    "esrap": "^2.2.11",
     "is-reference": "^3.0.3",
     "locate-character": "^3.0.0",
     "magic-string": "^0.30.11",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a970a9cf6a..a619c24ad6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -102,8 +102,8 @@ importers:
         specifier: ^1.2.1
         version: 1.2.1
       esrap:
-        specifier: ^2.2.9
-        version: 2.2.9(@typescript-eslint/types@8.59.4)
+        specifier: ^2.2.11
+        version: 2.2.11(@typescript-eslint/types@8.59.4)
       is-reference:
         specifier: ^3.0.3
         version: 3.0.3
@@ -1412,8 +1412,8 @@ packages:
     resolution: {integrity: sha512-Ap6G0WQwcU/LHsvLwON1fAQX9Zp0A2Y6Y/cJBl9r/JbW90Zyg4/zbG6zzKa2OTALELarYHmKu0GhpM5EO+7T0g==}
     engines: {node: '>=0.10'}
 
-  esrap@2.2.9:
-    resolution: {integrity: sha512-4KijP+NxCWthMCUC3qHbE6n4vCjqgJS1uAYKhuT/GWfFTf1Qyive2TgOjep+gzbSzRfnNyaN/UU9YmdOt8Eg0A==}
+  esrap@2.2.11:
+    resolution: {integrity: sha512-gPdx+I+BjYEinNMQaBXFjbaJVyoPMU4ZODg5mE+M4DqVG9VusAVHHjcBX+zqyITlI0DIARwDMMzZwAWj36dRoQ==}
     peerDependencies:
       '@typescript-eslint/types': ^8.2.0
     peerDependenciesMeta:
@@ -3683,9 +3683,9 @@ snapshots:
     dependencies:
       estraverse: 5.3.0
 
-  esrap@2.2.9(@typescript-eslint/types@8.59.4):
+  esrap@2.2.11(@typescript-eslint/types@8.59.4):
     dependencies:
-      '@jridgewell/sourcemap-codec': 1.5.0
+      '@jridgewell/sourcemap-codec': 1.5.5
     optionalDependencies:
       '@typescript-eslint/types': 8.59.4
 

From bdb1a0f847ba4f04252e9d26a7690dbfb0683da7 Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Thu, 4 Jun 2026 02:59:57 +0200
Subject: [PATCH 04/15] fix: ensure async block assigns correct nodes to effect
  (#18371)

If a block has a sole component child, we apply an optimization to not
need a template. But if that sole child is wrapped in `$.async`, it can
happens that the block's effect is assigned the wrong end node.

In the reproduction this happens because we have two components inside a
Child which is rendered only after an async block resolves. In
`$.append` we have logic to not reassign nodes when the active effect
didn't already run, which it has by the time we come across it (because
the async work had to resolve first; we added this in
https://github.com/sveltejs/svelte/pull/17120 to prevent the opposite,
nodes being "rewinded" to an earlier position) and so the second sibling
component's `$.append` will not set its end node to the effect. As a
result the end node is wrong (too early).

To fix this we assign the nodes in `$.async`. We could also use
`compareDocumentPosition` in `$.append` to only ever go forward, but
that feels a bit heavier performance-wise.

---------

Co-authored-by: paoloricciuti <ricciutipaolo@gmail.com>
Co-authored-by: Rich Harris <rich.harris@vercel.com>
---
 .changeset/async-hydration-orphan-nodes.md    |  5 +++
 .../src/internal/client/dom/blocks/async.js   |  2 +
 packages/svelte/tests/hydration/test.ts       |  8 ++--
 .../samples/async-sole-if-child/Child.svelte  |  7 ++++
 .../samples/async-sole-if-child/Footer.svelte |  1 +
 .../samples/async-sole-if-child/Header.svelte |  1 +
 .../samples/async-sole-if-child/_config.js    | 38 +++++++++++++++++++
 .../samples/async-sole-if-child/main.svelte   | 11 ++++++
 8 files changed, 69 insertions(+), 4 deletions(-)
 create mode 100644 .changeset/async-hydration-orphan-nodes.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Child.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Footer.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Header.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-sole-if-child/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-sole-if-child/main.svelte

diff --git a/.changeset/async-hydration-orphan-nodes.md b/.changeset/async-hydration-orphan-nodes.md
new file mode 100644
index 0000000000..4c35d6b74e
--- /dev/null
+++ b/.changeset/async-hydration-orphan-nodes.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: properly track effect end node for async sibling component
\ No newline at end of file
diff --git a/packages/svelte/src/internal/client/dom/blocks/async.js b/packages/svelte/src/internal/client/dom/blocks/async.js
index 170529a6b9..78e2ed44be 100644
--- a/packages/svelte/src/internal/client/dom/blocks/async.js
+++ b/packages/svelte/src/internal/client/dom/blocks/async.js
@@ -9,6 +9,7 @@ import {
 	set_hydrating,
 	skip_nodes
 } from '../hydration.js';
+import { assign_nodes } from '../template.js';
 
 /**
  * @param {TemplateNode} node
@@ -23,6 +24,7 @@ export function async(node, blockers = [], expressions = [], fn) {
 	if (was_hydrating) {
 		hydrate_next();
 		end = skip_nodes(false);
+		assign_nodes(node, end); // Necessary if this wraps the sole child of a block, else end marker can be wrong
 	}
 
 	if (expressions.length === 0 && blockers.every((b) => b.settled)) {
diff --git a/packages/svelte/tests/hydration/test.ts b/packages/svelte/tests/hydration/test.ts
index d2bf6fde34..0050130817 100644
--- a/packages/svelte/tests/hydration/test.ts
+++ b/packages/svelte/tests/hydration/test.ts
@@ -72,7 +72,7 @@ const { test, run } = suite<HydrationTest>(async (config, cwd) => {
 	const target = window.document.body;
 	const head = window.document.head;
 
-	const rendered = render((await import(`${cwd}/_output/server/main.svelte.js`)).default, {
+	const rendered = await render((await import(`${cwd}/_output/server/main.svelte.js`)).default, {
 		props: config.server_props ?? config.props ?? {},
 		idPrefix: config?.id_prefix
 	});
@@ -80,8 +80,8 @@ const { test, run } = suite<HydrationTest>(async (config, cwd) => {
 	const override = read(`${cwd}/_override.html`);
 	const override_head = read(`${cwd}/_override_head.html`);
 
-	fs.writeFileSync(`${cwd}/_output/body.html`, rendered.html + '\n');
-	target.innerHTML = override ?? rendered.html;
+	fs.writeFileSync(`${cwd}/_output/body.html`, rendered.body + '\n');
+	target.innerHTML = override ?? rendered.body;
 
 	if (rendered.head) {
 		fs.writeFileSync(`${cwd}/_output/head.html`, rendered.head + '\n');
@@ -145,7 +145,7 @@ const { test, run } = suite<HydrationTest>(async (config, cwd) => {
 
 		flushSync();
 
-		const expected = read(`${cwd}/_expected.html`) ?? rendered.html;
+		const expected = read(`${cwd}/_expected.html`) ?? rendered.body;
 		assert_html_equal(target.innerHTML, expected);
 
 		if (rendered.head) {
diff --git a/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Child.svelte b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Child.svelte
new file mode 100644
index 0000000000..304b7bd8a9
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Child.svelte
@@ -0,0 +1,7 @@
+<script>
+	import Header from './Header.svelte';
+	import Footer from './Footer.svelte';
+</script>
+ 
+<Header />
+<Footer />
diff --git a/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Footer.svelte b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Footer.svelte
new file mode 100644
index 0000000000..4c05c3d1ca
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Footer.svelte
@@ -0,0 +1 @@
+<footer>footer</footer>
\ No newline at end of file
diff --git a/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Header.svelte b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Header.svelte
new file mode 100644
index 0000000000..bb4683e48e
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/Header.svelte
@@ -0,0 +1 @@
+<header>header</header>
\ No newline at end of file
diff --git a/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/_config.js b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/_config.js
new file mode 100644
index 0000000000..842a314f73
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/_config.js
@@ -0,0 +1,38 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target }) {
+		await tick();
+		const [toggle] = target.querySelectorAll('button');
+
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>toggle</button>
+				<header>header</header>
+				<footer>footer</footer>
+			`
+		);
+
+		toggle.click();
+		await tick();
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>toggle</button>
+			`
+		);
+
+		toggle.click();
+		await tick();
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>toggle</button>
+				<header>header</header>
+				<footer>footer</footer>
+			`
+		);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/main.svelte
new file mode 100644
index 0000000000..9a061501dd
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-sole-if-child/main.svelte
@@ -0,0 +1,11 @@
+<script>
+	import Child from './Child.svelte';
+
+	let show = $state(true);
+</script>
+
+<button onclick={() => (show = !show)}>toggle</button>
+
+{#if show}
+	<Child gate={await Promise.resolve(true)} />
+{/if}

From 3d5c4ab620a597dfa296486e96642cff88bf90ec Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Thu, 4 Jun 2026 03:49:19 +0200
Subject: [PATCH 05/15] fix: prevent false-positive reactivity loss warning
 (#18373)

By checking that current/previous batch are null we filter out false
positives. `reactivity_loss_tracker` is only reset after a microtask, so
if a flush happens before that, we get warnings for things we shouldn't
warn on.

Fixes #18370

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>
---
 .changeset/rare-donkeys-repair.md                |  5 +++++
 .../src/internal/client/reactivity/async.js      |  8 ++++----
 packages/svelte/src/internal/client/runtime.js   |  6 ++++++
 .../_config.js                                   | 15 +++++++++++++++
 .../main.svelte                                  | 16 ++++++++++++++++
 5 files changed, 46 insertions(+), 4 deletions(-)
 create mode 100644 .changeset/rare-donkeys-repair.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/main.svelte

diff --git a/.changeset/rare-donkeys-repair.md b/.changeset/rare-donkeys-repair.md
new file mode 100644
index 0000000000..bd22c564db
--- /dev/null
+++ b/.changeset/rare-donkeys-repair.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: prevent false-positive reactivity loss warning
diff --git a/packages/svelte/src/internal/client/reactivity/async.js b/packages/svelte/src/internal/client/reactivity/async.js
index 32d33d6f7a..13b6e42b3e 100644
--- a/packages/svelte/src/internal/client/reactivity/async.js
+++ b/packages/svelte/src/internal/client/reactivity/async.js
@@ -181,10 +181,10 @@ export async function save(promise) {
  * @returns {Promise<() => T>}
  */
 export async function track_reactivity_loss(promise) {
-	var previous_async_effect = reactivity_loss_tracker;
+	var previous_reactivity_loss_tracker = reactivity_loss_tracker;
 	// Ensure that unrelated reads after an async operation is kicked off don't cause false positives
 	queueMicrotask(() => {
-		if (reactivity_loss_tracker === previous_async_effect) {
+		if (reactivity_loss_tracker === previous_reactivity_loss_tracker) {
 			set_reactivity_loss_tracker(null);
 		}
 	});
@@ -192,12 +192,12 @@ export async function track_reactivity_loss(promise) {
 	var value = await promise;
 
 	return () => {
-		set_reactivity_loss_tracker(previous_async_effect);
+		set_reactivity_loss_tracker(previous_reactivity_loss_tracker);
 		// While this can result in false negatives it also guards against the more important
 		// false positives that would occur if this is the last in a chain of async operations,
 		// and the reactivity_loss_tracker would then stay around until the next async operation happens.
 		queueMicrotask(() => {
-			if (reactivity_loss_tracker === previous_async_effect) {
+			if (reactivity_loss_tracker === previous_reactivity_loss_tracker) {
 				set_reactivity_loss_tracker(null);
 			}
 		});
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 8d70eee43c..227203523e 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -51,6 +51,7 @@ import {
 	batch_values,
 	current_batch,
 	flushSync,
+	previous_batch,
 	schedule_effect
 } from './reactivity/batch.js';
 import { handle_error } from './error-handling.js';
@@ -581,6 +582,11 @@ export function get(signal) {
 		if (
 			!untracking &&
 			reactivity_loss_tracker &&
+			// By checking that current/previous batch are null we filter out false positives.
+			// reactivity_loss_tracker is only reset after a microtask, so if a flush happens
+			// before that, we get warnings for things we shouldn't warn on.
+			current_batch === null &&
+			previous_batch === null &&
 			!reactivity_loss_tracker.warned &&
 			(reactivity_loss_tracker.effect.f & REACTION_IS_UPDATING) === 0 &&
 			!reactivity_loss_tracker.effect_deps.has(signal)
diff --git a/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/_config.js b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/_config.js
new file mode 100644
index 0000000000..4bd8adc9c5
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/_config.js
@@ -0,0 +1,15 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	compileOptions: { dev: true },
+	async test({ assert, target, warnings }) {
+		await tick();
+		const [increment] = target.querySelectorAll('button');
+
+		increment.click();
+		await new Promise((resolve) => setTimeout(resolve, 10));
+		assert.htmlEqual(target.innerHTML, '<button>increment</button> 1 1');
+		assert.deepEqual(warnings, []);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/main.svelte
new file mode 100644
index 0000000000..d47d99e652
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-reactivity-loss-no-false-positive-4/main.svelte
@@ -0,0 +1,16 @@
+<script>
+	let x = $state(0);
+	let y = $state(0);
+</script>
+
+<button
+	onclick={() => {
+		x++;
+		queueMicrotask(() => queueMicrotask(() => y++));
+	}}
+>
+	increment
+</button>
+
+{await x}
+{y}

From 51baf1c1af4f02e2a8b009a87d932437f164b612 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Thu, 4 Jun 2026 22:28:18 +0200
Subject: [PATCH 06/15] Version Packages (#18357)

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to main, this PR will
be updated.


# Releases
## svelte@5.56.2

### Patch Changes

- fix: properly track effect end node for async sibling component
([#18371](https://github.com/sveltejs/svelte/pull/18371))

- fix: prevent false-positive reactivity loss warning
([#18373](https://github.com/sveltejs/svelte/pull/18373))

- chore: bump esrap dependency
([#18372](https://github.com/sveltejs/svelte/pull/18372))

- fix: ignore declaration tags for animation directive
([#18366](https://github.com/sveltejs/svelte/pull/18366))

- fix: reject pending async deriveds on discard
([#18308](https://github.com/sveltejs/svelte/pull/18308))

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 .changeset/async-hydration-orphan-nodes.md |  5 -----
 .changeset/rare-donkeys-repair.md          |  5 -----
 .changeset/soft-moments-exist.md           |  5 -----
 .changeset/tangy-keys-drop.md              |  5 -----
 .changeset/warm-cougars-behave.md          |  5 -----
 packages/svelte/CHANGELOG.md               | 14 ++++++++++++++
 packages/svelte/package.json               |  2 +-
 packages/svelte/src/version.js             |  2 +-
 8 files changed, 16 insertions(+), 27 deletions(-)
 delete mode 100644 .changeset/async-hydration-orphan-nodes.md
 delete mode 100644 .changeset/rare-donkeys-repair.md
 delete mode 100644 .changeset/soft-moments-exist.md
 delete mode 100644 .changeset/tangy-keys-drop.md
 delete mode 100644 .changeset/warm-cougars-behave.md

diff --git a/.changeset/async-hydration-orphan-nodes.md b/.changeset/async-hydration-orphan-nodes.md
deleted file mode 100644
index 4c35d6b74e..0000000000
--- a/.changeset/async-hydration-orphan-nodes.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: properly track effect end node for async sibling component
\ No newline at end of file
diff --git a/.changeset/rare-donkeys-repair.md b/.changeset/rare-donkeys-repair.md
deleted file mode 100644
index bd22c564db..0000000000
--- a/.changeset/rare-donkeys-repair.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: prevent false-positive reactivity loss warning
diff --git a/.changeset/soft-moments-exist.md b/.changeset/soft-moments-exist.md
deleted file mode 100644
index 71a3148afa..0000000000
--- a/.changeset/soft-moments-exist.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-chore: bump esrap dependency
diff --git a/.changeset/tangy-keys-drop.md b/.changeset/tangy-keys-drop.md
deleted file mode 100644
index 38f0c10543..0000000000
--- a/.changeset/tangy-keys-drop.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: ignore declaration tags for animation directive
diff --git a/.changeset/warm-cougars-behave.md b/.changeset/warm-cougars-behave.md
deleted file mode 100644
index 15e32f7436..0000000000
--- a/.changeset/warm-cougars-behave.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: reject pending async deriveds on discard
diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index a8a94bc691..6d36f7b456 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,19 @@
 # svelte
 
+## 5.56.2
+
+### Patch Changes
+
+- fix: properly track effect end node for async sibling component ([#18371](https://github.com/sveltejs/svelte/pull/18371))
+
+- fix: prevent false-positive reactivity loss warning ([#18373](https://github.com/sveltejs/svelte/pull/18373))
+
+- chore: bump esrap dependency ([#18372](https://github.com/sveltejs/svelte/pull/18372))
+
+- fix: ignore declaration tags for animation directive ([#18366](https://github.com/sveltejs/svelte/pull/18366))
+
+- fix: reject pending async deriveds on discard ([#18308](https://github.com/sveltejs/svelte/pull/18308))
+
 ## 5.56.1
 
 ### Patch Changes
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 45bb45c695..a098b2689f 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.56.1",
+  "version": "5.56.2",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index 210d48461e..94d9a26dd9 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -4,5 +4,5 @@
  * The current version, as set in package.json.
  * @type {string}
  */
-export const VERSION = '5.56.1';
+export const VERSION = '5.56.2';
 export const PUBLIC_VERSION = '5';

From 3d83c9abe606415c2ceee215c76582ea9bcfa7b1 Mon Sep 17 00:00:00 2001
From: sijie-Z <1683039482@qq.com>
Date: Fri, 5 Jun 2026 21:35:31 +0800
Subject: [PATCH 07/15] fix: add bigint to Primitive type for $state.snapshot
 (#18388)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fixes #18385

  ## Problem

`$state.snapshot` infers BigInt properties as `never` because `bigint`
is missing
from the `Primitive` type definition. BigInt is a valid JavaScript
primitive and is
  supported by `structuredClone`.

  ## Solution

Added `bigint` to the `Primitive` type in both
`packages/svelte/src/ambient.d.ts` and
  `packages/svelte/types/index.d.ts`.

  ## Before

  ```ts
  const object = $state({ number: 1n });
  const snapshot = $state.snapshot(object);
  // snapshot.number is inferred as never ❌

  After

  const object = $state({ number: 1n });
  const snapshot = $state.snapshot(object);
  // snapshot.number is correctly inferred as bigint ✅

  Tests and linting

  - [x] This is a type-only change, no runtime behavior affected

---------

Co-authored-by: Rich Harris <hello@rich-harris.dev>
---
 .changeset/some-parts-watch.md   | 5 +++++
 packages/svelte/src/ambient.d.ts | 2 +-
 packages/svelte/types/index.d.ts | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/some-parts-watch.md

diff --git a/.changeset/some-parts-watch.md b/.changeset/some-parts-watch.md
new file mode 100644
index 0000000000..7d19a32f22
--- /dev/null
+++ b/.changeset/some-parts-watch.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: type BigInts in `$state.snapshot(...)` return values
diff --git a/packages/svelte/src/ambient.d.ts b/packages/svelte/src/ambient.d.ts
index bbbc86c997..ed0a004fa1 100644
--- a/packages/svelte/src/ambient.d.ts
+++ b/packages/svelte/src/ambient.d.ts
@@ -24,7 +24,7 @@ declare function $state<T>(initial: T): T;
 declare function $state<T>(): T | undefined;
 
 declare namespace $state {
-	type Primitive = string | number | boolean | null | undefined;
+	type Primitive = string | number | bigint | boolean | null | undefined;
 
 	type TypedArray =
 		| Int8Array
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 1c3795be80..5f41fabf60 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -3229,7 +3229,7 @@ declare function $state<T>(initial: T): T;
 declare function $state<T>(): T | undefined;
 
 declare namespace $state {
-	type Primitive = string | number | boolean | null | undefined;
+	type Primitive = string | number | bigint | boolean | null | undefined;
 
 	type TypedArray =
 		| Int8Array

From 71a6515bd648202b2795a80e68e7c9c7ac9ad4ee Mon Sep 17 00:00:00 2001
From: sijie-Z <1683039482@qq.com>
Date: Sat, 6 Jun 2026 03:17:49 +0800
Subject: [PATCH 08/15] fix: check boundary exists before calling error handler
 in async derived (#18384)

fixes #18383

I traced the issue to
`packages/svelte/src/internal/client/error-handling.js`, specifically
the `invoke_error_boundary` function. The problem is at line 56 where
`effect.b.error(error)` is called without checking if `effect.b` exists.

What happens is: when an async `$derived` rejects inside a
`<svelte:boundary>`, the error is handled correctly the first time. But
if the boundary is destroyed before the rejection fully settles (e.g.
component unmounts), a subsequent settle tries to call
`effect.b.error()` on a destroyed boundary where `effect.b` is `null`,
causing a `TypeError`.

The fix adds a null check for `effect.b` before calling `error()`. If
the boundary has been destroyed, we skip it and continue bubbling up to
the parent boundary. This way the error still gets handled properly
instead of crashing.

This could also be tested by creating a component with an async
`$derived` that rejects after the component unmounts, but I wanted to
get the fix up first for review.

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>
---
 .changeset/fix-boundary-null.md               |  5 ++++
 .../src/internal/client/error-handling.js     |  6 ++++-
 packages/svelte/src/internal/client/index.js  |  1 -
 .../async-error-boundary-4/Child.svelte       |  6 +++++
 .../samples/async-error-boundary-4/_config.js | 13 +++++++++
 .../async-error-boundary-4/main.svelte        | 27 +++++++++++++++++++
 6 files changed, 56 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/fix-boundary-null.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/Child.svelte
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/main.svelte

diff --git a/.changeset/fix-boundary-null.md b/.changeset/fix-boundary-null.md
new file mode 100644
index 0000000000..c87a47ce34
--- /dev/null
+++ b/.changeset/fix-boundary-null.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: ignore errors that occur in destroyed effects
diff --git a/packages/svelte/src/internal/client/error-handling.js b/packages/svelte/src/internal/client/error-handling.js
index 5d16759266..7c404dd933 100644
--- a/packages/svelte/src/internal/client/error-handling.js
+++ b/packages/svelte/src/internal/client/error-handling.js
@@ -3,7 +3,7 @@
 import { DEV } from 'esm-env';
 import { FILENAME } from '../../constants.js';
 import { is_firefox } from './dom/operations.js';
-import { ERROR_VALUE, BOUNDARY_EFFECT, REACTION_RAN, EFFECT } from './constants.js';
+import { ERROR_VALUE, BOUNDARY_EFFECT, REACTION_RAN, EFFECT, DESTROYED } from './constants.js';
 import { define_property, get_descriptor } from '../shared/utils.js';
 import { active_effect, active_reaction } from './runtime.js';
 
@@ -45,6 +45,10 @@ export function handle_error(error) {
  * @param {Effect | null} effect
  */
 export function invoke_error_boundary(error, effect) {
+	if (effect !== null && (effect.f & DESTROYED) !== 0) {
+		return;
+	}
+
 	while (effect !== null) {
 		if ((effect.f & BOUNDARY_EFFECT) !== 0) {
 			if ((effect.f & REACTION_RAN) === 0) {
diff --git a/packages/svelte/src/internal/client/index.js b/packages/svelte/src/internal/client/index.js
index 988998d067..fa6f9dda39 100644
--- a/packages/svelte/src/internal/client/index.js
+++ b/packages/svelte/src/internal/client/index.js
@@ -180,4 +180,3 @@ export {
 } from '../shared/validate.js';
 export { strict_equals, equals } from './dev/equality.js';
 export { log_if_contains_state } from './dev/console-log.js';
-export { invoke_error_boundary } from './error-handling.js';
diff --git a/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/Child.svelte b/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/Child.svelte
new file mode 100644
index 0000000000..8bfc51bb7a
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/Child.svelte
@@ -0,0 +1,6 @@
+<script>
+	const data = $derived(await Promise.reject(new Error('oops')));
+	const model = $derived({ title: data.title });
+</script>
+
+<h4>{model.title}</h4>
diff --git a/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/_config.js b/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/_config.js
new file mode 100644
index 0000000000..a3cda2f865
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/_config.js
@@ -0,0 +1,13 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	async test({ assert, target }) {
+		const [button] = target.querySelectorAll('button');
+
+		button.click();
+		await tick();
+
+		assert.htmlEqual(target.innerHTML, '<button>show</button><p>error was contained</p>');
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/main.svelte
new file mode 100644
index 0000000000..3b5f51742a
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-error-boundary-4/main.svelte
@@ -0,0 +1,27 @@
+<script>
+	import Child from './Child.svelte';
+
+	let open = $state(false);
+</script>
+
+<svelte:boundary>
+	<button onclick={() => (open = true)}>show</button>
+
+	{#if open}
+		<svelte:boundary>
+			<Child />
+
+			{#snippet pending()}
+				<p>loading…</p>
+			{/snippet}
+
+			{#snippet failed()}
+				<p>error was contained</p>
+			{/snippet}
+		</svelte:boundary>
+	{/if}
+
+	{#snippet failed()}
+		<p>error escaped containment</p>
+	{/snippet}
+</svelte:boundary>

From a9f48540e236d326714a1148b9d61cf785c0f98a Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Sun, 7 Jun 2026 14:25:58 -0400
Subject: [PATCH 09/15] Version Packages (#18389)

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to main, this PR will
be updated.


# Releases
## svelte@5.56.3

### Patch Changes

- fix: ignore errors that occur in destroyed effects
([#18384](https://github.com/sveltejs/svelte/pull/18384))

- fix: type BigInts in `$state.snapshot(...)` return values
([#18388](https://github.com/sveltejs/svelte/pull/18388))

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 .changeset/fix-boundary-null.md | 5 -----
 .changeset/some-parts-watch.md  | 5 -----
 packages/svelte/CHANGELOG.md    | 8 ++++++++
 packages/svelte/package.json    | 2 +-
 packages/svelte/src/version.js  | 2 +-
 5 files changed, 10 insertions(+), 12 deletions(-)
 delete mode 100644 .changeset/fix-boundary-null.md
 delete mode 100644 .changeset/some-parts-watch.md

diff --git a/.changeset/fix-boundary-null.md b/.changeset/fix-boundary-null.md
deleted file mode 100644
index c87a47ce34..0000000000
--- a/.changeset/fix-boundary-null.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"svelte": patch
----
-
-fix: ignore errors that occur in destroyed effects
diff --git a/.changeset/some-parts-watch.md b/.changeset/some-parts-watch.md
deleted file mode 100644
index 7d19a32f22..0000000000
--- a/.changeset/some-parts-watch.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"svelte": patch
----
-
-fix: type BigInts in `$state.snapshot(...)` return values
diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index 6d36f7b456..02dd84ddff 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,13 @@
 # svelte
 
+## 5.56.3
+
+### Patch Changes
+
+- fix: ignore errors that occur in destroyed effects ([#18384](https://github.com/sveltejs/svelte/pull/18384))
+
+- fix: type BigInts in `$state.snapshot(...)` return values ([#18388](https://github.com/sveltejs/svelte/pull/18388))
+
 ## 5.56.2
 
 ### Patch Changes
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index a098b2689f..6bca1bd4a8 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.56.2",
+  "version": "5.56.3",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index 94d9a26dd9..b6d4236ff8 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -4,5 +4,5 @@
  * The current version, as set in package.json.
  * @type {string}
  */
-export const VERSION = '5.56.2';
+export const VERSION = '5.56.3';
 export const PUBLIC_VERSION = '5';

From 8ea3ee8c62aed631d5c4bbc0870d491059ed7d03 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 15 Jun 2026 10:52:21 -0400
Subject: [PATCH 10/15] chore(deps-dev): bump esbuild from 0.25.11 to 0.28.1
 (#18427)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Bumps [esbuild](https://github.com/evanw/esbuild) from 0.25.11 to
0.28.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/evanw/esbuild/releases">esbuild's
releases</a>.</em></p>
<blockquote>
<h2>v0.28.1</h2>
<ul>
<li>
<p>Disallow <code>\</code> in local development server HTTP requests (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-g7r4-m6w7-qqqr">GHSA-g7r4-m6w7-qqqr</a>)</p>
<p>This release fixes a security issue where HTTP requests to esbuild's
local development server could traverse outside of the serve directory
on Windows using a <code>\</code> backslash character. It happened due
to the use of Go's <code>path.Clean()</code> function, which only
handles Unix-style <code>/</code> characters. HTTP requests with paths
containing <code>\</code> are no longer allowed.</p>
<p>Thanks to <a
href="https://github.com/dellalibera"><code>@​dellalibera</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Add integrity checks to the Deno API (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-gv7w-rqvm-qjhr">GHSA-gv7w-rqvm-qjhr</a>)</p>
<p>The previous release of esbuild added integrity checks to esbuild's
npm install script. This release also adds integrity checks to esbuild's
Deno install script. Now esbuild's Deno API will also fail with an error
if the downloaded esbuild binary contains something other than the
expected content.</p>
<p>Note that esbuild's Deno API installs from
<code>registry.npmjs.org</code> by default, but allows the
<code>NPM_CONFIG_REGISTRY</code> environment variable to override this
with a custom package registry. This change means that the esbuild
executable served by <code>NPM_CONFIG_REGISTRY</code> must now match the
expected content.</p>
<p>Thanks to <a
href="https://github.com/sondt99"><code>@​sondt99</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Avoid inlining <code>using</code> and <code>await using</code>
declarations (<a
href="https://redirect.github.com/evanw/esbuild/issues/4482">#4482</a>)</p>
<p>Previously esbuild's minifier sometimes incorrectly inlined
<code>using</code> and <code>await using</code> declarations into
subsequent uses of that declaration, which then fails to dispose of the
resource correctly. This bug happened because inlining was done for
<code>let</code> and <code>const</code> declarations by avoiding doing
it for <code>var</code> declarations, which no longer worked when more
declaration types were added. Here's an example:</p>
<pre lang="js"><code>// Original code
{
  using x = new Resource()
  x.activate()
}
<p>// Old output (with --minify)<br />
new Resource().activate();</p>
<p>// New output (with --minify)<br />
{using e=new Resource;e.activate()}<br />
</code></pre></p>
</li>
<li>
<p>Fix module evaluation when an error is thrown (<a
href="https://redirect.github.com/evanw/esbuild/issues/4461">#4461</a>,
<a
href="https://redirect.github.com/evanw/esbuild/pull/4467">#4467</a>)</p>
<p>If an error is thrown during module evaluation, esbuild previously
didn't preserve the state of the module for subsequent module
references. This was observable if <code>import()</code> or
<code>require()</code> is used to import a module multiple times. The
thrown error is supposed to be thrown by every call to
<code>import()</code> or <code>require()</code>, not just the first.
With this release, esbuild will now throw the same error every time you
call <code>import()</code> or <code>require()</code> on a module that
throws during its evaluation.</p>
</li>
<li>
<p>Fix some edge cases around the <code>new</code> operator (<a
href="https://redirect.github.com/evanw/esbuild/issues/4477">#4477</a>)</p>
<p>Previously esbuild incorrectly printed certain edge cases involving
complex expressions inside the target of a <code>new</code> expression
(specifically an optional chain and/or a tagged template literal). The
generated code for the <code>new</code> target was not correctly wrapped
with parentheses, and either contained a syntax error or had different
semantics. These edge cases have been fixed so that they now correctly
wrap the <code>new</code> target in parentheses. Here is an example of
some affected code:</p>
<pre lang="js"><code>// Original code
new (foo()`bar`)()
new (foo()?.bar)()
<p>// Old output<br />
new foo()<code>bar</code>();<br />
new (foo())?.bar();</p>
<p></code></pre></p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/evanw/esbuild/blob/main/CHANGELOG-2025.md">esbuild's
changelog</a>.</em></p>
<blockquote>
<h1>Changelog: 2025</h1>
<p>This changelog documents all esbuild versions published in the year
2025 (versions 0.25.0 through 0.27.2).</p>
<h2>0.27.2</h2>
<ul>
<li>
<p>Allow import path specifiers starting with <code>#/</code> (<a
href="https://redirect.github.com/evanw/esbuild/pull/4361">#4361</a>)</p>
<p>Previously the specification for <code>package.json</code> disallowed
import path specifiers starting with <code>#/</code>, but this
restriction <a
href="https://redirect.github.com/nodejs/node/pull/60864">has recently
been relaxed</a> and support for it is being added across the JavaScript
ecosystem. One use case is using it for a wildcard pattern such as
mapping <code>#/*</code> to <code>./src/*</code> (previously you had to
use another character such as <code>#_*</code> instead, which was more
confusing). There is some more context in <a
href="https://redirect.github.com/nodejs/node/issues/49182">nodejs/node#49182</a>.</p>
<p>This change was contributed by <a
href="https://github.com/hybrist"><code>@​hybrist</code></a>.</p>
</li>
<li>
<p>Automatically add the <code>-webkit-mask</code> prefix (<a
href="https://redirect.github.com/evanw/esbuild/issues/4357">#4357</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/4358">#4358</a>)</p>
<p>This release automatically adds the <code>-webkit-</code> vendor
prefix for the <a
href="https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/mask"><code>mask</code></a>
CSS shorthand property:</p>
<pre lang="css"><code>/* Original code */
main {
  mask: url(x.png) center/5rem no-repeat
}
<p>/* Old output (with --target=chrome110) */<br />
main {<br />
mask: url(x.png) center/5rem no-repeat;<br />
}</p>
<p>/* New output (with --target=chrome110) */<br />
main {<br />
-webkit-mask: url(x.png) center/5rem no-repeat;<br />
mask: url(x.png) center/5rem no-repeat;<br />
}<br />
</code></pre></p>
<p>This change was contributed by <a
href="https://github.com/BPJEnnova"><code>@​BPJEnnova</code></a>.</p>
</li>
<li>
<p>Additional minification of <code>switch</code> statements (<a
href="https://redirect.github.com/evanw/esbuild/issues/4176">#4176</a>,
<a
href="https://redirect.github.com/evanw/esbuild/issues/4359">#4359</a>)</p>
<p>This release contains additional minification patterns for reducing
<code>switch</code> statements. Here is an example:</p>
<pre lang="js"><code>// Original code
switch (x) {
  case 0:
    foo()
    break
  case 1:
  default:
    bar()
}
</code></pre>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/evanw/esbuild/commit/bb9db84c02433fbe37b3509f53f9f3e3cc48725e"><code>bb9db84</code></a>
publish 0.28.1 to npm</li>
<li><a
href="https://github.com/evanw/esbuild/commit/9ff053e53b8eeb990f59355dbea365277ac45ee2"><code>9ff053e</code></a>
security: add integrity checks to the Deno API</li>
<li><a
href="https://github.com/evanw/esbuild/commit/0a9bf2135b67c7e28989a5ba19f0f000805a5ab5"><code>0a9bf21</code></a>
enforce non-negative size in gzip parser</li>
<li><a
href="https://github.com/evanw/esbuild/commit/e2a1a7132058ee067fe736eac15f695861b8654e"><code>e2a1a71</code></a>
security: forbid <code>\\</code> in local dev server requests</li>
<li><a
href="https://github.com/evanw/esbuild/commit/83a2cbfc35809f4fd5152da59572d7bed7739d78"><code>83a2cbf</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4482">#4482</a>:
don't inline <code>using</code> declarations</li>
<li><a
href="https://github.com/evanw/esbuild/commit/308ad745d824c77bc607603451b257d0f2fd9a38"><code>308ad74</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4471">#4471</a>:
renaming of nested <code>var</code> declarations</li>
<li><a
href="https://github.com/evanw/esbuild/commit/f013f5f99a015bce92ec48d49181d4ad3177b29b"><code>f013f5f</code></a>
fix some typos</li>
<li><a
href="https://github.com/evanw/esbuild/commit/aafd6e48b1088336a5f5a17e930be7e840d43d8c"><code>aafd6e4</code></a>
chore: fix some minor issues in comments (<a
href="https://redirect.github.com/evanw/esbuild/issues/4462">#4462</a>)</li>
<li><a
href="https://github.com/evanw/esbuild/commit/15300c30b5e22f7cfcbed850c246d35095658386"><code>15300c3</code></a>
follow up: cjs evaluation fixes</li>
<li><a
href="https://github.com/evanw/esbuild/commit/1bda0c31d7697c0af44b3ab39b81e599e559a395"><code>1bda0c3</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4461">#4461</a>,
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4467">#4467</a>:
esm evaluation fixes</li>
<li>Additional commits viewable in <a
href="https://github.com/evanw/esbuild/compare/v0.25.11...v0.28.1">compare
view</a></li>
</ul>
</details>
<details>
<summary>Maintainer changes</summary>
<p>This version was pushed to npm by <a
href="https://www.npmjs.com/~GitHub%20Actions">GitHub Actions</a>, a new
releaser for esbuild since your current version.</p>
</details>
<br />


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---
 packages/svelte/package.json |   2 +-
 pnpm-lock.yaml               | 342 ++++++++++++++++++-----------------
 2 files changed, 178 insertions(+), 166 deletions(-)

diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 6bca1bd4a8..eeca8e032e 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -161,7 +161,7 @@
     "@types/node": "^20.11.5",
     "baseline-browser-mapping": "^2.10.32",
     "dts-buddy": "^0.5.5",
-    "esbuild": "^0.25.10",
+    "esbuild": "^0.28.1",
     "rollup": "^4.59.0",
     "source-map": "^0.7.4",
     "tinyglobby": "^0.2.12",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a619c24ad6..e86c927efe 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -148,8 +148,8 @@ importers:
         specifier: ^0.5.5
         version: 0.5.5(typescript@5.5.4)
       esbuild:
-        specifier: ^0.25.10
-        version: 0.25.11
+        specifier: ^0.28.1
+        version: 0.28.1
       rollup:
         specifier: ^4.59.0
         version: 4.60.1
@@ -285,23 +285,17 @@ packages:
   '@changesets/write@0.4.0':
     resolution: {integrity: sha512-CdTLvIOPiCNuH71pyDu3rA+Q0n65cmAbXnwWH84rKGiFumFzkmHNT8KHTMEchcxN+Kl8I54xGUhJ7l3E7X396Q==}
 
-  '@esbuild/aix-ppc64@0.25.11':
-    resolution: {integrity: sha512-Xt1dOL13m8u0WE8iplx9Ibbm+hFAO0GsU2P34UNoDGvZYkY8ifSiy6Zuc1lYxfG7svWE2fzqCUmFp5HCn51gJg==}
-    engines: {node: '>=18'}
-    cpu: [ppc64]
-    os: [aix]
-
   '@esbuild/aix-ppc64@0.27.7':
     resolution: {integrity: sha512-EKX3Qwmhz1eMdEJokhALr0YiD0lhQNwDqkPYyPhiSwKrh7/4KRjQc04sZ8db+5DVVnZ1LmbNDI1uAMPEUBnQPg==}
     engines: {node: '>=18'}
     cpu: [ppc64]
     os: [aix]
 
-  '@esbuild/android-arm64@0.25.11':
-    resolution: {integrity: sha512-9slpyFBc4FPPz48+f6jyiXOx/Y4v34TUeDDXJpZqAWQn/08lKGeD8aDp9TMn9jDz2CiEuHwfhRmGBvpnd/PWIQ==}
+  '@esbuild/aix-ppc64@0.28.1':
+    resolution: {integrity: sha512-Svl7tq8k/08+p6CXPpRjQ1fKX+1odH/BQbb48fV6fj3CWHhsoIOoY87w1oHXm0qEpkIK3ZfVgp0hed3XBXzXMQ==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [android]
+    cpu: [ppc64]
+    os: [aix]
 
   '@esbuild/android-arm64@0.27.7':
     resolution: {integrity: sha512-62dPZHpIXzvChfvfLJow3q5dDtiNMkwiRzPylSCfriLvZeq0a1bWChrGx/BbUbPwOrsWKMn8idSllklzBy+dgQ==}
@@ -309,10 +303,10 @@ packages:
     cpu: [arm64]
     os: [android]
 
-  '@esbuild/android-arm@0.25.11':
-    resolution: {integrity: sha512-uoa7dU+Dt3HYsethkJ1k6Z9YdcHjTrSb5NUy66ZfZaSV8hEYGD5ZHbEMXnqLFlbBflLsl89Zke7CAdDJ4JI+Gg==}
+  '@esbuild/android-arm64@0.28.1':
+    resolution: {integrity: sha512-34EGEbCIAgosYz6goLcopX6Mo7NyGv9tfwEM2/7Ce2VcVRk568iSvniGWcUXIy7wEDR1wzolcxcriFVrWYcwBg==}
     engines: {node: '>=18'}
-    cpu: [arm]
+    cpu: [arm64]
     os: [android]
 
   '@esbuild/android-arm@0.27.7':
@@ -321,10 +315,10 @@ packages:
     cpu: [arm]
     os: [android]
 
-  '@esbuild/android-x64@0.25.11':
-    resolution: {integrity: sha512-Sgiab4xBjPU1QoPEIqS3Xx+R2lezu0LKIEcYe6pftr56PqPygbB7+szVnzoShbx64MUupqoE0KyRlN7gezbl8g==}
+  '@esbuild/android-arm@0.28.1':
+    resolution: {integrity: sha512-0k2F129Xdio1TdJfzJ8sy1Q47vUD2NnwdhiAf7drUN1EBTfPf4hsFCtmMgu/6m8JSzsBrlmVjudMBQqOfG8usQ==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [arm]
     os: [android]
 
   '@esbuild/android-x64@0.27.7':
@@ -333,11 +327,11 @@ packages:
     cpu: [x64]
     os: [android]
 
-  '@esbuild/darwin-arm64@0.25.11':
-    resolution: {integrity: sha512-VekY0PBCukppoQrycFxUqkCojnTQhdec0vevUL/EDOCnXd9LKWqD/bHwMPzigIJXPhC59Vd1WFIL57SKs2mg4w==}
+  '@esbuild/android-x64@0.28.1':
+    resolution: {integrity: sha512-dbwY7ltSMDWsRatcRpCnES4F+im88OCUgGZjy52shC7GqHRE/cYlxNbB4Z4UpJswpcc4Qxd2oE/ufM0p61IKng==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [darwin]
+    cpu: [x64]
+    os: [android]
 
   '@esbuild/darwin-arm64@0.27.7':
     resolution: {integrity: sha512-5lckdqeuBPlKUwvoCXIgI2D9/ABmPq3Rdp7IfL70393YgaASt7tbju3Ac+ePVi3KDH6N2RqePfHnXkaDtY9fkw==}
@@ -345,10 +339,10 @@ packages:
     cpu: [arm64]
     os: [darwin]
 
-  '@esbuild/darwin-x64@0.25.11':
-    resolution: {integrity: sha512-+hfp3yfBalNEpTGp9loYgbknjR695HkqtY3d3/JjSRUyPg/xd6q+mQqIb5qdywnDxRZykIHs3axEqU6l1+oWEQ==}
+  '@esbuild/darwin-arm64@0.28.1':
+    resolution: {integrity: sha512-TZbWkQY7kvTAXbXUT7uVACR5cMHsDiSz9z7ZKAX/RTq/WJEk3QyRr0wZpNhBDX+/0CtdqUIJlOiodQcta6tY3Q==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [arm64]
     os: [darwin]
 
   '@esbuild/darwin-x64@0.27.7':
@@ -357,11 +351,11 @@ packages:
     cpu: [x64]
     os: [darwin]
 
-  '@esbuild/freebsd-arm64@0.25.11':
-    resolution: {integrity: sha512-CmKjrnayyTJF2eVuO//uSjl/K3KsMIeYeyN7FyDBjsR3lnSJHaXlVoAK8DZa7lXWChbuOk7NjAc7ygAwrnPBhA==}
+  '@esbuild/darwin-x64@0.28.1':
+    resolution: {integrity: sha512-zfdzgK9ACBNZLI/CyHTOx81SyNbM6YXn7rxSgX97VjyiPl9W1i4Ka4fgKECEoFCKGpvBj5qArWIGgQjOwkgskQ==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [freebsd]
+    cpu: [x64]
+    os: [darwin]
 
   '@esbuild/freebsd-arm64@0.27.7':
     resolution: {integrity: sha512-B48PqeCsEgOtzME2GbNM2roU29AMTuOIN91dsMO30t+Ydis3z/3Ngoj5hhnsOSSwNzS+6JppqWsuhTp6E82l2w==}
@@ -369,10 +363,10 @@ packages:
     cpu: [arm64]
     os: [freebsd]
 
-  '@esbuild/freebsd-x64@0.25.11':
-    resolution: {integrity: sha512-Dyq+5oscTJvMaYPvW3x3FLpi2+gSZTCE/1ffdwuM6G1ARang/mb3jvjxs0mw6n3Lsw84ocfo9CrNMqc5lTfGOw==}
+  '@esbuild/freebsd-arm64@0.28.1':
+    resolution: {integrity: sha512-wG2EA8ENdEI0qhkSZMjfqrdY+ziCYCPMmtZjjIwOmXFjmyzEHn+UUxk5of+SYsjtfs3VpnlC7QLzSI5hY/rOAw==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [arm64]
     os: [freebsd]
 
   '@esbuild/freebsd-x64@0.27.7':
@@ -381,11 +375,11 @@ packages:
     cpu: [x64]
     os: [freebsd]
 
-  '@esbuild/linux-arm64@0.25.11':
-    resolution: {integrity: sha512-Qr8AzcplUhGvdyUF08A1kHU3Vr2O88xxP0Tm8GcdVOUm25XYcMPp2YqSVHbLuXzYQMf9Bh/iKx7YPqECs6ffLA==}
+  '@esbuild/freebsd-x64@0.28.1':
+    resolution: {integrity: sha512-i7dZ9vQgnvSCzi/rYCXNgtF/U+eKZNJBzu3eTQbRgHnM7tNSizLOkRFAl3qzVc/Op/u5YkHHa4pf/3DOYHthLQ==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [linux]
+    cpu: [x64]
+    os: [freebsd]
 
   '@esbuild/linux-arm64@0.27.7':
     resolution: {integrity: sha512-RZPHBoxXuNnPQO9rvjh5jdkRmVizktkT7TCDkDmQ0W2SwHInKCAV95GRuvdSvA7w4VMwfCjUiPwDi0ZO6Nfe9A==}
@@ -393,10 +387,10 @@ packages:
     cpu: [arm64]
     os: [linux]
 
-  '@esbuild/linux-arm@0.25.11':
-    resolution: {integrity: sha512-TBMv6B4kCfrGJ8cUPo7vd6NECZH/8hPpBHHlYI3qzoYFvWu2AdTvZNuU/7hsbKWqu/COU7NIK12dHAAqBLLXgw==}
+  '@esbuild/linux-arm64@0.28.1':
+    resolution: {integrity: sha512-yHs+0uc8+nvEAfAfxrWQKK5peSNzBc4PegcMO0EJ2hT71uA7vB8Ihg2e77R2P7SG5uYjPbHlLLmve4LLLRCf0g==}
     engines: {node: '>=18'}
-    cpu: [arm]
+    cpu: [arm64]
     os: [linux]
 
   '@esbuild/linux-arm@0.27.7':
@@ -405,10 +399,10 @@ packages:
     cpu: [arm]
     os: [linux]
 
-  '@esbuild/linux-ia32@0.25.11':
-    resolution: {integrity: sha512-TmnJg8BMGPehs5JKrCLqyWTVAvielc615jbkOirATQvWWB1NMXY77oLMzsUjRLa0+ngecEmDGqt5jiDC6bfvOw==}
+  '@esbuild/linux-arm@0.28.1':
+    resolution: {integrity: sha512-qVXBOHQS+d5Y722GwJzJUtOLlX7km3CraOaGormF1pDtPd2C/l1SHRPgjLunLGe51Sh5YYWKMFDyV4SxgMQYTQ==}
     engines: {node: '>=18'}
-    cpu: [ia32]
+    cpu: [arm]
     os: [linux]
 
   '@esbuild/linux-ia32@0.27.7':
@@ -417,10 +411,10 @@ packages:
     cpu: [ia32]
     os: [linux]
 
-  '@esbuild/linux-loong64@0.25.11':
-    resolution: {integrity: sha512-DIGXL2+gvDaXlaq8xruNXUJdT5tF+SBbJQKbWy/0J7OhU8gOHOzKmGIlfTTl6nHaCOoipxQbuJi7O++ldrxgMw==}
+  '@esbuild/linux-ia32@0.28.1':
+    resolution: {integrity: sha512-d1z4ZuP0ajrfz/FhGT4vv278rX8KnPPJx8i5+AtK7TYbx9Le9F1hyzurZpkEyjkGa9dUGhQow4C1NmeGvqxN2w==}
     engines: {node: '>=18'}
-    cpu: [loong64]
+    cpu: [ia32]
     os: [linux]
 
   '@esbuild/linux-loong64@0.27.7':
@@ -429,10 +423,10 @@ packages:
     cpu: [loong64]
     os: [linux]
 
-  '@esbuild/linux-mips64el@0.25.11':
-    resolution: {integrity: sha512-Osx1nALUJu4pU43o9OyjSCXokFkFbyzjXb6VhGIJZQ5JZi8ylCQ9/LFagolPsHtgw6himDSyb5ETSfmp4rpiKQ==}
+  '@esbuild/linux-loong64@0.28.1':
+    resolution: {integrity: sha512-M5sRjUVZrkm1OAPR3dlOYzNmN+loZKGVi1VUQGrwuqLcbR6qeAz+famMhjASeH3YVKvZz+zT1jlh/keC3Rj/lg==}
     engines: {node: '>=18'}
-    cpu: [mips64el]
+    cpu: [loong64]
     os: [linux]
 
   '@esbuild/linux-mips64el@0.27.7':
@@ -441,10 +435,10 @@ packages:
     cpu: [mips64el]
     os: [linux]
 
-  '@esbuild/linux-ppc64@0.25.11':
-    resolution: {integrity: sha512-nbLFgsQQEsBa8XSgSTSlrnBSrpoWh7ioFDUmwo158gIm5NNP+17IYmNWzaIzWmgCxq56vfr34xGkOcZ7jX6CPw==}
+  '@esbuild/linux-mips64el@0.28.1':
+    resolution: {integrity: sha512-mRObBZeHh2OxcBFPWE/FjylkRgZdYuiTR3vaTozquCGOH14iP9oN4x4Ge81CoIDYQrXmIxpFumJBu5MtZpnQJQ==}
     engines: {node: '>=18'}
-    cpu: [ppc64]
+    cpu: [mips64el]
     os: [linux]
 
   '@esbuild/linux-ppc64@0.27.7':
@@ -453,10 +447,10 @@ packages:
     cpu: [ppc64]
     os: [linux]
 
-  '@esbuild/linux-riscv64@0.25.11':
-    resolution: {integrity: sha512-HfyAmqZi9uBAbgKYP1yGuI7tSREXwIb438q0nqvlpxAOs3XnZ8RsisRfmVsgV486NdjD7Mw2UrFSw51lzUk1ww==}
+  '@esbuild/linux-ppc64@0.28.1':
+    resolution: {integrity: sha512-slScBsMAb3GFDcdrCgLwZtPYRoH2H/youv10QiZyRjmsP48fznoveWytSgCI/R0ZcUgpc0ZhIUEx6LHts8yrfQ==}
     engines: {node: '>=18'}
-    cpu: [riscv64]
+    cpu: [ppc64]
     os: [linux]
 
   '@esbuild/linux-riscv64@0.27.7':
@@ -465,10 +459,10 @@ packages:
     cpu: [riscv64]
     os: [linux]
 
-  '@esbuild/linux-s390x@0.25.11':
-    resolution: {integrity: sha512-HjLqVgSSYnVXRisyfmzsH6mXqyvj0SA7pG5g+9W7ESgwA70AXYNpfKBqh1KbTxmQVaYxpzA/SvlB9oclGPbApw==}
+  '@esbuild/linux-riscv64@0.28.1':
+    resolution: {integrity: sha512-kw0owk1o0GFETUJyW0jc0G4Yzs0BHZn0JDZ8JRT088vjJYX777BAs1fDGxAC+q831qOs2DTC96mNsG2opdfyyQ==}
     engines: {node: '>=18'}
-    cpu: [s390x]
+    cpu: [riscv64]
     os: [linux]
 
   '@esbuild/linux-s390x@0.27.7':
@@ -477,10 +471,10 @@ packages:
     cpu: [s390x]
     os: [linux]
 
-  '@esbuild/linux-x64@0.25.11':
-    resolution: {integrity: sha512-HSFAT4+WYjIhrHxKBwGmOOSpphjYkcswF449j6EjsjbinTZbp8PJtjsVK1XFJStdzXdy/jaddAep2FGY+wyFAQ==}
+  '@esbuild/linux-s390x@0.28.1':
+    resolution: {integrity: sha512-/lAIjX8aYFRByhh6L5rYtPEDRqa9de/4V/juOXcta5frjvzXO4/sqEtyytse0g3zZFuWu5cDN0MkLz2qRDD2Ag==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [s390x]
     os: [linux]
 
   '@esbuild/linux-x64@0.27.7':
@@ -489,11 +483,11 @@ packages:
     cpu: [x64]
     os: [linux]
 
-  '@esbuild/netbsd-arm64@0.25.11':
-    resolution: {integrity: sha512-hr9Oxj1Fa4r04dNpWr3P8QKVVsjQhqrMSUzZzf+LZcYjZNqhA3IAfPQdEh1FLVUJSiu6sgAwp3OmwBfbFgG2Xg==}
+  '@esbuild/linux-x64@0.28.1':
+    resolution: {integrity: sha512-u/anNYF2mmVOEDwLtnQ1wOr3EZ9sTNGLWrsYGYwHWzGA3Si84IOkHXlbWTD1NB+9/1lcnweYKO54uhxZydNzfA==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [netbsd]
+    cpu: [x64]
+    os: [linux]
 
   '@esbuild/netbsd-arm64@0.27.7':
     resolution: {integrity: sha512-b6pqtrQdigZBwZxAn1UpazEisvwaIDvdbMbmrly7cDTMFnw/+3lVxxCTGOrkPVnsYIosJJXAsILG9XcQS+Yu6w==}
@@ -501,10 +495,10 @@ packages:
     cpu: [arm64]
     os: [netbsd]
 
-  '@esbuild/netbsd-x64@0.25.11':
-    resolution: {integrity: sha512-u7tKA+qbzBydyj0vgpu+5h5AeudxOAGncb8N6C9Kh1N4n7wU1Xw1JDApsRjpShRpXRQlJLb9wY28ELpwdPcZ7A==}
+  '@esbuild/netbsd-arm64@0.28.1':
+    resolution: {integrity: sha512-oks0DYbLwWMmaakTsCb+zL4E+aHRVLom9IJZOAthMQEPiQmydXHkziYEsGYRx0uNV/IjEKGAV941JzH02pflqw==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [arm64]
     os: [netbsd]
 
   '@esbuild/netbsd-x64@0.27.7':
@@ -513,11 +507,11 @@ packages:
     cpu: [x64]
     os: [netbsd]
 
-  '@esbuild/openbsd-arm64@0.25.11':
-    resolution: {integrity: sha512-Qq6YHhayieor3DxFOoYM1q0q1uMFYb7cSpLD2qzDSvK1NAvqFi8Xgivv0cFC6J+hWVw2teCYltyy9/m/14ryHg==}
+  '@esbuild/netbsd-x64@0.28.1':
+    resolution: {integrity: sha512-aeL6lAnN89Hz43Mlh1G8ARasbuoYvSITDEx0tHh5b7jJnHcssqgjy9Yx430GDpmCa6OyrKoS0aNRjKundRizGg==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [openbsd]
+    cpu: [x64]
+    os: [netbsd]
 
   '@esbuild/openbsd-arm64@0.27.7':
     resolution: {integrity: sha512-AFuojMQTxAz75Fo8idVcqoQWEHIXFRbOc1TrVcFSgCZtQfSdc1RXgB3tjOn/krRHENUB4j00bfGjyl2mJrU37A==}
@@ -525,10 +519,10 @@ packages:
     cpu: [arm64]
     os: [openbsd]
 
-  '@esbuild/openbsd-x64@0.25.11':
-    resolution: {integrity: sha512-CN+7c++kkbrckTOz5hrehxWN7uIhFFlmS/hqziSFVWpAzpWrQoAG4chH+nN3Be+Kzv/uuo7zhX716x3Sn2Jduw==}
+  '@esbuild/openbsd-arm64@0.28.1':
+    resolution: {integrity: sha512-MEFJe5C3R8pwXdZ5Y21oo6m7ePiS0d9pWucn99O/wvyJZChoIQKrQDxKrGeW8F5+T0okTHesAmDeiHDTIq0V/Q==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [arm64]
     os: [openbsd]
 
   '@esbuild/openbsd-x64@0.27.7':
@@ -537,11 +531,11 @@ packages:
     cpu: [x64]
     os: [openbsd]
 
-  '@esbuild/openharmony-arm64@0.25.11':
-    resolution: {integrity: sha512-rOREuNIQgaiR+9QuNkbkxubbp8MSO9rONmwP5nKncnWJ9v5jQ4JxFnLu4zDSRPf3x4u+2VN4pM4RdyIzDty/wQ==}
+  '@esbuild/openbsd-x64@0.28.1':
+    resolution: {integrity: sha512-i/ZLIOafE0Z8cI/XANJAixoJL/uRAoS2xOA3rb0xN+KK0K177cMAsQYkzHtBrtMXAKuAc7HGgcWiZ/sRC1Nxgw==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [openharmony]
+    cpu: [x64]
+    os: [openbsd]
 
   '@esbuild/openharmony-arm64@0.27.7':
     resolution: {integrity: sha512-+KrvYb/C8zA9CU/g0sR6w2RBw7IGc5J2BPnc3dYc5VJxHCSF1yNMxTV5LQ7GuKteQXZtspjFbiuW5/dOj7H4Yw==}
@@ -549,11 +543,11 @@ packages:
     cpu: [arm64]
     os: [openharmony]
 
-  '@esbuild/sunos-x64@0.25.11':
-    resolution: {integrity: sha512-nq2xdYaWxyg9DcIyXkZhcYulC6pQ2FuCgem3LI92IwMgIZ69KHeY8T4Y88pcwoLIjbed8n36CyKoYRDygNSGhA==}
+  '@esbuild/openharmony-arm64@0.28.1':
+    resolution: {integrity: sha512-ge+Z7EXFNt2BO1oAMsVpiQ8EwndV9i1xXerAeTIK7AtPs3bKFXQM7nlRxDSIUIMeueR1CNXxqztLzdNeReKBJg==}
     engines: {node: '>=18'}
-    cpu: [x64]
-    os: [sunos]
+    cpu: [arm64]
+    os: [openharmony]
 
   '@esbuild/sunos-x64@0.27.7':
     resolution: {integrity: sha512-ikktIhFBzQNt/QDyOL580ti9+5mL/YZeUPKU2ivGtGjdTYoqz6jObj6nOMfhASpS4GU4Q/Clh1QtxWAvcYKamA==}
@@ -561,11 +555,11 @@ packages:
     cpu: [x64]
     os: [sunos]
 
-  '@esbuild/win32-arm64@0.25.11':
-    resolution: {integrity: sha512-3XxECOWJq1qMZ3MN8srCJ/QfoLpL+VaxD/WfNRm1O3B4+AZ/BnLVgFbUV3eiRYDMXetciH16dwPbbHqwe1uU0Q==}
+  '@esbuild/sunos-x64@0.28.1':
+    resolution: {integrity: sha512-BEjgtECkL3vY+SaSQ6nzVfiALUeFxpawyp8Jmf5PtYhf1Ug40N1h/hxlhts+f1FvSvarEigdxS3BlSMI2PJLcQ==}
     engines: {node: '>=18'}
-    cpu: [arm64]
-    os: [win32]
+    cpu: [x64]
+    os: [sunos]
 
   '@esbuild/win32-arm64@0.27.7':
     resolution: {integrity: sha512-7yRhbHvPqSpRUV7Q20VuDwbjW5kIMwTHpptuUzV+AA46kiPze5Z7qgt6CLCK3pWFrHeNfDd1VKgyP4O+ng17CA==}
@@ -573,10 +567,10 @@ packages:
     cpu: [arm64]
     os: [win32]
 
-  '@esbuild/win32-ia32@0.25.11':
-    resolution: {integrity: sha512-3ukss6gb9XZ8TlRyJlgLn17ecsK4NSQTmdIXRASVsiS2sQ6zPPZklNJT5GR5tE/MUarymmy8kCEf5xPCNCqVOA==}
+  '@esbuild/win32-arm64@0.28.1':
+    resolution: {integrity: sha512-lCv9eK/H6ZJWbE7bh2nw54CZ9M2nupBxJcTsdk/QQnWkdSjKGuxmmH8/GWrlT1eMmZfn4dGcCjRte397WqfQXA==}
     engines: {node: '>=18'}
-    cpu: [ia32]
+    cpu: [arm64]
     os: [win32]
 
   '@esbuild/win32-ia32@0.27.7':
@@ -585,10 +579,10 @@ packages:
     cpu: [ia32]
     os: [win32]
 
-  '@esbuild/win32-x64@0.25.11':
-    resolution: {integrity: sha512-D7Hpz6A2L4hzsRpPaCYkQnGOotdUpDzSGRIv9I+1ITdHROSFUWW95ZPZWQmGka1Fg7W3zFJowyn9WGwMJ0+KPA==}
+  '@esbuild/win32-ia32@0.28.1':
+    resolution: {integrity: sha512-zvb/mB2bSCoJOpoCBgYKKpX6YM6mJBlBUVUtVj41DlZJVEB6/0CKlRYxP5wWl1C1ILiCoAU5wZZ4q1P3qeS6Eg==}
     engines: {node: '>=18'}
-    cpu: [x64]
+    cpu: [ia32]
     os: [win32]
 
   '@esbuild/win32-x64@0.27.7':
@@ -597,6 +591,12 @@ packages:
     cpu: [x64]
     os: [win32]
 
+  '@esbuild/win32-x64@0.28.1':
+    resolution: {integrity: sha512-bm4Mowrv+GXMlpWX++EcXw/iLyd1o3+bJkC2DkWXYVvgZCqD/bSj9ctZeAMC3cIxgjRVR2Dufaiu4YPxr5gW1A==}
+    engines: {node: '>=18'}
+    cpu: [x64]
+    os: [win32]
+
   '@eslint-community/eslint-utils@4.9.1':
     resolution: {integrity: sha512-phrYmNiYppR7znFEdqgfWHXR6NCkZEK7hwWDHZUjit/2/U0r6XvkDl0SYnoM51Hq7FhCGdLDT6zxCCOY1hexsQ==}
     engines: {node: ^12.22.0 || ^14.17.0 || >=16.0.0}
@@ -936,6 +936,7 @@ packages:
   '@svitejs/changesets-changelog-github-compact@1.1.0':
     resolution: {integrity: sha512-qhUGGDHcpbY2zpjW3SwqchuW8J/5EzlPFud7xNntHKA7f3a/mx5+g+ruJKFHSAiVZYo30PALt+AyhmPUNKH/Og==}
     engines: {node: ^14.13.1 || ^16.0.0 || >=18}
+    deprecated: unmaintained
 
   '@types/aria-query@5.0.4':
     resolution: {integrity: sha512-rfT93uj5s0PRL7EzccGMs3brplhcrghnDoV26NqKhCAS1hVo+WdNsPvE/yb6ilfr5hi2MEk6d5EWJTKdxg8jVw==}
@@ -1090,6 +1091,11 @@ packages:
     engines: {node: '>=0.4.0'}
     hasBin: true
 
+  acorn@8.17.0:
+    resolution: {integrity: sha512-xRQbDb9BnwDafYNn6Vwl839DYVjqXYb1XVGtWAZ1kcDc6iwAL4hg3B1dZlRiuENFeO2H53gFG3in621AdERVAg==}
+    engines: {node: '>=0.4.0'}
+    hasBin: true
+
   agent-base@7.1.1:
     resolution: {integrity: sha512-H0TSyFNDMomMNJQBn8wFV5YC/2eJ+VXECwOadZJT554xP6cODZHPX3H9QMQECxvrgiSOP1pHjy1sMWQVYJOUOA==}
     engines: {node: '>= 14'}
@@ -1287,8 +1293,8 @@ packages:
     peerDependencies:
       typescript: '>=5.0.4 <5.8'
 
-  enhanced-resolve@5.22.1:
-    resolution: {integrity: sha512-6QEuw3zoX1SJQc7b87aBXke/no+mG2bTBgw29gWMQonLmpEkWoCAVkl+M49e48AZlWzxiDzDZzYdp6kobcyLww==}
+  enhanced-resolve@5.24.0:
+    resolution: {integrity: sha512-SkE2t82KlkkxQRVMVLAGKxLfORGQfrkx5dkj+vlgXRVNEdPc4eZcR+J/Fvj8C+yKSFH5L0q3NFlyufOVQnCcYQ==}
     engines: {node: '>=10.13.0'}
 
   enquirer@2.4.1:
@@ -1305,13 +1311,13 @@ packages:
   es-module-lexer@2.1.0:
     resolution: {integrity: sha512-n27zTYMjYu1aj4MjCWzSP7G9r75utsaoc8m61weK+W8JMBGGQybd43GstCXZ3WNmSFtGT9wi59qQTW6mhTR5LQ==}
 
-  esbuild@0.25.11:
-    resolution: {integrity: sha512-KohQwyzrKTQmhXDW1PjCv3Tyspn9n5GcY2RTDqeORIdIJY8yKIF7sTSopFmn/wpMPW4rdPXI0UE5LJLuq3bx0Q==}
+  esbuild@0.27.7:
+    resolution: {integrity: sha512-IxpibTjyVnmrIQo5aqNpCgoACA/dTKLTlhMHihVHhdkxKyPO1uBBthumT0rdHmcsk9uMonIWS0m4FljWzILh3w==}
     engines: {node: '>=18'}
     hasBin: true
 
-  esbuild@0.27.7:
-    resolution: {integrity: sha512-IxpibTjyVnmrIQo5aqNpCgoACA/dTKLTlhMHihVHhdkxKyPO1uBBthumT0rdHmcsk9uMonIWS0m4FljWzILh3w==}
+  esbuild@0.28.1:
+    resolution: {integrity: sha512-HrJrvZv5ayxBzPfwphOoNzkzOIIlifzk0KJrGK2c8R4+LKpMtpYLQeUdjnwjWv/LZlkH2laZk+4w78pi99D4Vw==}
     engines: {node: '>=18'}
     hasBin: true
 
@@ -2095,8 +2101,8 @@ packages:
     engines: {node: '>=10'}
     hasBin: true
 
-  semver@7.8.1:
-    resolution: {integrity: sha512-rkVq3IXh+4FDGch+KwzX3aV9W3kO54GyEgpvBzSyctDA6Xtd7RJQV1xmXbeQp5v7+VzLOfVqiutSE6GICgPFvg==}
+  semver@7.8.4:
+    resolution: {integrity: sha512-rUCObTnP32Q08R2uuIrt7r9PlEonuTmtuXYcW6s5kjdlj3xbnwe+21yXptAUYcMAABLkYYTtnmzb3w3EDZfueA==}
     engines: {node: '>=10'}
     hasBin: true
 
@@ -2663,162 +2669,162 @@ snapshots:
       human-id: 4.1.1
       prettier: 2.8.8
 
-  '@esbuild/aix-ppc64@0.25.11':
-    optional: true
-
   '@esbuild/aix-ppc64@0.27.7':
     optional: true
 
-  '@esbuild/android-arm64@0.25.11':
+  '@esbuild/aix-ppc64@0.28.1':
     optional: true
 
   '@esbuild/android-arm64@0.27.7':
     optional: true
 
-  '@esbuild/android-arm@0.25.11':
+  '@esbuild/android-arm64@0.28.1':
     optional: true
 
   '@esbuild/android-arm@0.27.7':
     optional: true
 
-  '@esbuild/android-x64@0.25.11':
+  '@esbuild/android-arm@0.28.1':
     optional: true
 
   '@esbuild/android-x64@0.27.7':
     optional: true
 
-  '@esbuild/darwin-arm64@0.25.11':
+  '@esbuild/android-x64@0.28.1':
     optional: true
 
   '@esbuild/darwin-arm64@0.27.7':
     optional: true
 
-  '@esbuild/darwin-x64@0.25.11':
+  '@esbuild/darwin-arm64@0.28.1':
     optional: true
 
   '@esbuild/darwin-x64@0.27.7':
     optional: true
 
-  '@esbuild/freebsd-arm64@0.25.11':
+  '@esbuild/darwin-x64@0.28.1':
     optional: true
 
   '@esbuild/freebsd-arm64@0.27.7':
     optional: true
 
-  '@esbuild/freebsd-x64@0.25.11':
+  '@esbuild/freebsd-arm64@0.28.1':
     optional: true
 
   '@esbuild/freebsd-x64@0.27.7':
     optional: true
 
-  '@esbuild/linux-arm64@0.25.11':
+  '@esbuild/freebsd-x64@0.28.1':
     optional: true
 
   '@esbuild/linux-arm64@0.27.7':
     optional: true
 
-  '@esbuild/linux-arm@0.25.11':
+  '@esbuild/linux-arm64@0.28.1':
     optional: true
 
   '@esbuild/linux-arm@0.27.7':
     optional: true
 
-  '@esbuild/linux-ia32@0.25.11':
+  '@esbuild/linux-arm@0.28.1':
     optional: true
 
   '@esbuild/linux-ia32@0.27.7':
     optional: true
 
-  '@esbuild/linux-loong64@0.25.11':
+  '@esbuild/linux-ia32@0.28.1':
     optional: true
 
   '@esbuild/linux-loong64@0.27.7':
     optional: true
 
-  '@esbuild/linux-mips64el@0.25.11':
+  '@esbuild/linux-loong64@0.28.1':
     optional: true
 
   '@esbuild/linux-mips64el@0.27.7':
     optional: true
 
-  '@esbuild/linux-ppc64@0.25.11':
+  '@esbuild/linux-mips64el@0.28.1':
     optional: true
 
   '@esbuild/linux-ppc64@0.27.7':
     optional: true
 
-  '@esbuild/linux-riscv64@0.25.11':
+  '@esbuild/linux-ppc64@0.28.1':
     optional: true
 
   '@esbuild/linux-riscv64@0.27.7':
     optional: true
 
-  '@esbuild/linux-s390x@0.25.11':
+  '@esbuild/linux-riscv64@0.28.1':
     optional: true
 
   '@esbuild/linux-s390x@0.27.7':
     optional: true
 
-  '@esbuild/linux-x64@0.25.11':
+  '@esbuild/linux-s390x@0.28.1':
     optional: true
 
   '@esbuild/linux-x64@0.27.7':
     optional: true
 
-  '@esbuild/netbsd-arm64@0.25.11':
+  '@esbuild/linux-x64@0.28.1':
     optional: true
 
   '@esbuild/netbsd-arm64@0.27.7':
     optional: true
 
-  '@esbuild/netbsd-x64@0.25.11':
+  '@esbuild/netbsd-arm64@0.28.1':
     optional: true
 
   '@esbuild/netbsd-x64@0.27.7':
     optional: true
 
-  '@esbuild/openbsd-arm64@0.25.11':
+  '@esbuild/netbsd-x64@0.28.1':
     optional: true
 
   '@esbuild/openbsd-arm64@0.27.7':
     optional: true
 
-  '@esbuild/openbsd-x64@0.25.11':
+  '@esbuild/openbsd-arm64@0.28.1':
     optional: true
 
   '@esbuild/openbsd-x64@0.27.7':
     optional: true
 
-  '@esbuild/openharmony-arm64@0.25.11':
+  '@esbuild/openbsd-x64@0.28.1':
     optional: true
 
   '@esbuild/openharmony-arm64@0.27.7':
     optional: true
 
-  '@esbuild/sunos-x64@0.25.11':
+  '@esbuild/openharmony-arm64@0.28.1':
     optional: true
 
   '@esbuild/sunos-x64@0.27.7':
     optional: true
 
-  '@esbuild/win32-arm64@0.25.11':
+  '@esbuild/sunos-x64@0.28.1':
     optional: true
 
   '@esbuild/win32-arm64@0.27.7':
     optional: true
 
-  '@esbuild/win32-ia32@0.25.11':
+  '@esbuild/win32-arm64@0.28.1':
     optional: true
 
   '@esbuild/win32-ia32@0.27.7':
     optional: true
 
-  '@esbuild/win32-x64@0.25.11':
+  '@esbuild/win32-ia32@0.28.1':
     optional: true
 
   '@esbuild/win32-x64@0.27.7':
     optional: true
 
+  '@esbuild/win32-x64@0.28.1':
+    optional: true
+
   '@eslint-community/eslint-utils@4.9.1(eslint@10.0.0)':
     dependencies:
       eslint: 10.0.0
@@ -3062,7 +3068,7 @@ snapshots:
   '@stylistic/eslint-plugin-js@1.8.0(eslint@10.0.0)':
     dependencies:
       '@types/eslint': 8.56.12
-      acorn: 8.16.0
+      acorn: 8.17.0
       escape-string-regexp: 4.0.0
       eslint: 10.0.0
       eslint-visitor-keys: 3.4.3
@@ -3303,8 +3309,14 @@ snapshots:
     dependencies:
       acorn: 8.16.0
 
+  acorn-jsx@5.3.2(acorn@8.17.0):
+    dependencies:
+      acorn: 8.17.0
+
   acorn@8.16.0: {}
 
+  acorn@8.17.0: {}
+
   agent-base@7.1.1:
     dependencies:
       debug: 4.4.3
@@ -3475,7 +3487,7 @@ snapshots:
       ts-api-utils: 1.3.0(typescript@5.5.4)
       typescript: 5.5.4
 
-  enhanced-resolve@5.22.1:
+  enhanced-resolve@5.24.0:
     dependencies:
       graceful-fs: 4.2.11
       tapable: 2.3.3
@@ -3491,35 +3503,6 @@ snapshots:
 
   es-module-lexer@2.1.0: {}
 
-  esbuild@0.25.11:
-    optionalDependencies:
-      '@esbuild/aix-ppc64': 0.25.11
-      '@esbuild/android-arm': 0.25.11
-      '@esbuild/android-arm64': 0.25.11
-      '@esbuild/android-x64': 0.25.11
-      '@esbuild/darwin-arm64': 0.25.11
-      '@esbuild/darwin-x64': 0.25.11
-      '@esbuild/freebsd-arm64': 0.25.11
-      '@esbuild/freebsd-x64': 0.25.11
-      '@esbuild/linux-arm': 0.25.11
-      '@esbuild/linux-arm64': 0.25.11
-      '@esbuild/linux-ia32': 0.25.11
-      '@esbuild/linux-loong64': 0.25.11
-      '@esbuild/linux-mips64el': 0.25.11
-      '@esbuild/linux-ppc64': 0.25.11
-      '@esbuild/linux-riscv64': 0.25.11
-      '@esbuild/linux-s390x': 0.25.11
-      '@esbuild/linux-x64': 0.25.11
-      '@esbuild/netbsd-arm64': 0.25.11
-      '@esbuild/netbsd-x64': 0.25.11
-      '@esbuild/openbsd-arm64': 0.25.11
-      '@esbuild/openbsd-x64': 0.25.11
-      '@esbuild/openharmony-arm64': 0.25.11
-      '@esbuild/sunos-x64': 0.25.11
-      '@esbuild/win32-arm64': 0.25.11
-      '@esbuild/win32-ia32': 0.25.11
-      '@esbuild/win32-x64': 0.25.11
-
   esbuild@0.27.7:
     optionalDependencies:
       '@esbuild/aix-ppc64': 0.27.7
@@ -3549,12 +3532,41 @@ snapshots:
       '@esbuild/win32-ia32': 0.27.7
       '@esbuild/win32-x64': 0.27.7
 
+  esbuild@0.28.1:
+    optionalDependencies:
+      '@esbuild/aix-ppc64': 0.28.1
+      '@esbuild/android-arm': 0.28.1
+      '@esbuild/android-arm64': 0.28.1
+      '@esbuild/android-x64': 0.28.1
+      '@esbuild/darwin-arm64': 0.28.1
+      '@esbuild/darwin-x64': 0.28.1
+      '@esbuild/freebsd-arm64': 0.28.1
+      '@esbuild/freebsd-x64': 0.28.1
+      '@esbuild/linux-arm': 0.28.1
+      '@esbuild/linux-arm64': 0.28.1
+      '@esbuild/linux-ia32': 0.28.1
+      '@esbuild/linux-loong64': 0.28.1
+      '@esbuild/linux-mips64el': 0.28.1
+      '@esbuild/linux-ppc64': 0.28.1
+      '@esbuild/linux-riscv64': 0.28.1
+      '@esbuild/linux-s390x': 0.28.1
+      '@esbuild/linux-x64': 0.28.1
+      '@esbuild/netbsd-arm64': 0.28.1
+      '@esbuild/netbsd-x64': 0.28.1
+      '@esbuild/openbsd-arm64': 0.28.1
+      '@esbuild/openbsd-x64': 0.28.1
+      '@esbuild/openharmony-arm64': 0.28.1
+      '@esbuild/sunos-x64': 0.28.1
+      '@esbuild/win32-arm64': 0.28.1
+      '@esbuild/win32-ia32': 0.28.1
+      '@esbuild/win32-x64': 0.28.1
+
   escape-string-regexp@4.0.0: {}
 
   eslint-compat-utils@0.5.1(eslint@10.0.0):
     dependencies:
       eslint: 10.0.0
-      semver: 7.8.1
+      semver: 7.8.4
 
   eslint-config-prettier@9.1.0(eslint@10.0.0):
     dependencies:
@@ -3574,14 +3586,14 @@ snapshots:
   eslint-plugin-n@17.24.0(eslint@10.0.0)(typescript@5.5.4):
     dependencies:
       '@eslint-community/eslint-utils': 4.9.1(eslint@10.0.0)
-      enhanced-resolve: 5.22.1
+      enhanced-resolve: 5.24.0
       eslint: 10.0.0
       eslint-plugin-es-x: 7.8.0(eslint@10.0.0)
       get-tsconfig: 4.14.0
       globals: 15.15.0
       globrex: 0.1.2
       ignore: 5.3.2
-      semver: 7.8.1
+      semver: 7.8.4
       ts-declaration-location: 1.0.7(typescript@5.5.4)
     transitivePeerDependencies:
       - typescript
@@ -3673,8 +3685,8 @@ snapshots:
 
   espree@9.6.1:
     dependencies:
-      acorn: 8.16.0
-      acorn-jsx: 5.3.2(acorn@8.16.0)
+      acorn: 8.17.0
+      acorn-jsx: 5.3.2(acorn@8.17.0)
       eslint-visitor-keys: 3.4.3
 
   esprima@4.0.1: {}
@@ -4312,7 +4324,7 @@ snapshots:
 
   semver@7.7.4: {}
 
-  semver@7.8.1: {}
+  semver@7.8.4: {}
 
   serialize-javascript@6.0.2:
     dependencies:

From 0510174bc0c908c9d4980274717191fdf46a38c6 Mon Sep 17 00:00:00 2001
From: Nic Polumeyv <nicolas.polum@outlook.com>
Date: Mon, 15 Jun 2026 12:08:45 -0400
Subject: [PATCH 11/15] fix: make `SvelteURLSearchParams` notifications
 accurate (#18425)

`SvelteURLSearchParams` has two notification bugs that surface through
`SvelteURL`.

The first is over-notification. Setting `url.href` always rebuilds the
params and bumps their version signal, even when the search string
didn't change at all. Effects that read `size` (or any params method)
re-run on every unrelated `href` write, which is #17218, where it caused
infinite effect loops in a router. The fix is a guard in the internal
replace path that bails out when the incoming params serialize
identically to the current ones.

The second is under-notification, and it's sneakier. Every read method
tracks the version signal, `get`, `getAll`, `has`, `keys`, `values`,
`entries`, `toString`, `size`, the iterator... except `forEach`, which
was never overridden. The inherited platform method reads the internal
list directly and subscribes to nothing, so a template that renders
params via `forEach` never updates:

```js
$effect(() => {
	url.searchParams.forEach((value, key) => entries.push(`${key}=${value}`)); // never re-runs
});
```

We found this one in the wild while making `page.url` a `SvelteURL` in
sveltejs/kit#16031. Kit's own test suite renders query params with
`forEach`, and the coarse object-identity signal that previously masked
the gap went away, leaving stale UI after client-side navigations. The
fix is the same one-line tracking pattern every other read method
already uses.

Fixes #17218

---

- [x] It's really useful if your PR references an issue where it is
discussed ahead of time. In many cases, features are absent for a
reason. For large changes, please create an RFC:
https://github.com/sveltejs/rfcs
- [x] Prefix your PR title with `feat:`, `fix:`, `chore:`, or `docs:`.
- [x] This message body should clearly illustrate what problems it
solves.
- [x] Ideally, include a test that fails without this PR but passes with
it.
- [x] If this PR changes code within `packages/svelte/src`, add a
changeset (`npx changeset`).

### Tests and linting

- [x] Run the tests with `pnpm test` and lint the project with `pnpm
lint`
---
 .changeset/quick-meals-shout.md               |  5 ++
 .../src/reactivity/url-search-params.js       | 15 ++++
 .../src/reactivity/url-search-params.test.ts  | 21 ++++++
 packages/svelte/src/reactivity/url.test.ts    | 74 +++++++++++++++++++
 4 files changed, 115 insertions(+)
 create mode 100644 .changeset/quick-meals-shout.md

diff --git a/.changeset/quick-meals-shout.md b/.changeset/quick-meals-shout.md
new file mode 100644
index 0000000000..21871edd67
--- /dev/null
+++ b/.changeset/quick-meals-shout.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: don't notify `searchParams` subscribers when the URL changes without affecting the search string
diff --git a/packages/svelte/src/reactivity/url-search-params.js b/packages/svelte/src/reactivity/url-search-params.js
index 38cf3ebe4f..d745bb6b08 100644
--- a/packages/svelte/src/reactivity/url-search-params.js
+++ b/packages/svelte/src/reactivity/url-search-params.js
@@ -54,6 +54,11 @@ export class SvelteURLSearchParams extends URLSearchParams {
 	 */
 	[REPLACE](params) {
 		if (this.#updating) return;
+
+		// the URL may have changed in a way that leaves the search string untouched —
+		// don't rebuild the params or notify readers if nothing changed
+		if (params.toString() === super.toString()) return;
+
 		this.#updating = true;
 
 		for (const key of [...super.keys()]) {
@@ -126,6 +131,16 @@ export class SvelteURLSearchParams extends URLSearchParams {
 		return super.keys();
 	}
 
+	/**
+	 * @param {(value: string, key: string, parent: URLSearchParams) => void} callback
+	 * @param {any} [this_arg]
+	 * @returns {void}
+	 */
+	forEach(callback, this_arg) {
+		get(this.#version);
+		super.forEach(callback, this_arg);
+	}
+
 	/**
 	 * @param {string} name
 	 * @param {string} value
diff --git a/packages/svelte/src/reactivity/url-search-params.test.ts b/packages/svelte/src/reactivity/url-search-params.test.ts
index b0c84872b0..765b4020f3 100644
--- a/packages/svelte/src/reactivity/url-search-params.test.ts
+++ b/packages/svelte/src/reactivity/url-search-params.test.ts
@@ -244,3 +244,24 @@ test('URLSearchParams.toString', () => {
 test('SvelteURLSearchParams instanceof URLSearchParams', () => {
 	assert.ok(new SvelteURLSearchParams() instanceof URLSearchParams);
 });
+
+test('params.forEach is reactive', () => {
+	const params = new SvelteURLSearchParams('foo=1');
+	const log: any = [];
+
+	const cleanup = effect_root(() => {
+		render_effect(() => {
+			const entries: string[] = [];
+			params.forEach((value, key) => entries.push(`${key}=${value}`));
+			log.push(entries.join('&'));
+		});
+	});
+
+	flushSync(() => {
+		params.set('foo', '2');
+	});
+
+	assert.deepEqual(log, ['foo=1', 'foo=2']);
+
+	cleanup();
+});
diff --git a/packages/svelte/src/reactivity/url.test.ts b/packages/svelte/src/reactivity/url.test.ts
index a79aa32315..d698116421 100644
--- a/packages/svelte/src/reactivity/url.test.ts
+++ b/packages/svelte/src/reactivity/url.test.ts
@@ -166,3 +166,77 @@ test('url.search normalizes value', () => {
 test('SvelteURL instanceof URL', () => {
 	assert.ok(new SvelteURL('https://svelte.dev') instanceof URL);
 });
+
+test('url.searchParams subscribers are not notified by changes that leave the search string untouched', () => {
+	const url = new SvelteURL('https://svelte.dev/a?foo=bar');
+	const log: any = [];
+
+	const cleanup = effect_root(() => {
+		render_effect(() => {
+			log.push(url.searchParams.toString());
+		});
+	});
+
+	flushSync(() => {
+		// does not affect the search string
+		url.pathname = '/b';
+	});
+
+	flushSync(() => {
+		// neither does this
+		url.href = 'https://svelte.dev/c?foo=bar#hash';
+	});
+
+	flushSync(() => {
+		// but this does
+		url.search = '?foo=baz';
+	});
+
+	assert.deepEqual(log, ['foo=bar', 'foo=baz']);
+
+	cleanup();
+});
+
+test('url.searchParams.size is not notified by unrelated href changes', () => {
+	const url = new SvelteURL('https://svelte.dev/?foo=bar');
+	const log: any = [];
+
+	const cleanup = effect_root(() => {
+		render_effect(() => {
+			log.push(url.searchParams.size);
+		});
+	});
+
+	flushSync(() => {
+		url.href = 'https://svelte.dev/other?foo=bar';
+	});
+
+	flushSync(() => {
+		url.searchParams.append('baz', 'qux');
+	});
+
+	assert.deepEqual(log, [1, 2]);
+
+	cleanup();
+});
+
+test('url.searchParams.forEach re-runs when the search string changes via the URL', () => {
+	const url = new SvelteURL('https://svelte.dev/?foo=1');
+	const log: any = [];
+
+	const cleanup = effect_root(() => {
+		render_effect(() => {
+			const entries: string[] = [];
+			url.searchParams.forEach((value, key) => entries.push(`${key}=${value}`));
+			log.push(entries.join('&'));
+		});
+	});
+
+	flushSync(() => {
+		url.href = 'https://svelte.dev/?bar=2';
+	});
+
+	assert.deepEqual(log, ['foo=1', 'bar=2']);
+
+	cleanup();
+});

From c4daa490bbbf483ebba117c1afb6f71b4b19e63c Mon Sep 17 00:00:00 2001
From: Yuichiro Yamashita <xydybaseball@gmail.com>
Date: Tue, 16 Jun 2026 01:18:02 +0900
Subject: [PATCH 12/15] fix: include wrapping parentheses in `{@const}`
 declarator end (#18436)

`{@const x = (a)}` (and any `{@const}` whose initializer is wrapped in
parentheses, e.g. `(a = b)`, `({ ... })`) produced a
`VariableDeclarator` whose `end` fell before the closing `)`.
`read_expression` strips the wrapping parens from the returned node but
advances the parser past them, so `init.end` excludes the `)` while the
parser position does not. Use the parser position for the declarator
`end` instead. Fixes source slices / tooling that rely on the node range
(the range previously yielded invalid, unbalanced source).

<img width="2064" height="1746" alt="image"
src="https://github.com/user-attachments/assets/64153ee5-d543-442d-8018-d3668acfd7a7"
/>


### Before submitting the PR, please make sure you do the following

- [x] It's really useful if your PR references an issue where it is
discussed ahead of time. In many cases, features are absent for a
reason. For large changes, please create an RFC:
https://github.com/sveltejs/rfcs
- [x] Prefix your PR title with `feat:`, `fix:`, `chore:`, or `docs:`.
- [x] This message body should clearly illustrate what problems it
solves.
- [x] Ideally, include a test that fails without this PR but passes with
it.
- [x] If this PR changes code within `packages/svelte/src`, add a
changeset (`npx changeset`).

### Tests and linting

- [ ] Run the tests with `pnpm test` and lint the project with `pnpm
lint`
---
 .changeset/clean-melons-attack.md             |   5 +
 .../src/compiler/phases/1-parse/state/tag.js  |   6 +-
 .../const-tag-parenthesized-init/input.svelte |   6 +
 .../const-tag-parenthesized-init/output.json  | 527 ++++++++++++++++++
 4 files changed, 543 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/clean-melons-attack.md
 create mode 100644 packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/input.svelte
 create mode 100644 packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/output.json

diff --git a/.changeset/clean-melons-attack.md b/.changeset/clean-melons-attack.md
new file mode 100644
index 0000000000..8b5a9f2066
--- /dev/null
+++ b/.changeset/clean-melons-attack.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: include wrapping parentheses in `{@const}` declarator `end` position
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/tag.js b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
index 15c79e0353..f5314d04ed 100644
--- a/packages/svelte/src/compiler/phases/1-parse/state/tag.js
+++ b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
@@ -783,6 +783,8 @@ function special(parser) {
 
 		const expression_start = parser.index;
 		const init = read_expression(parser);
+		// parser is past wrapping parens, but `init.end` is not — use the parser position
+		const declarator_end = parser.index;
 		if (
 			init.type === 'SequenceExpression' &&
 			!parser.template.substring(expression_start, init.start).includes('(')
@@ -801,7 +803,9 @@ function special(parser) {
 			declaration: {
 				type: 'VariableDeclaration',
 				kind: 'const',
-				declarations: [{ type: 'VariableDeclarator', id, init, start: id.start, end: init.end }],
+				declarations: [
+					{ type: 'VariableDeclarator', id, init, start: id.start, end: declarator_end }
+				],
 				start: start + 2, // start at const, not at @const
 				end: parser.index - 1
 			},
diff --git a/packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/input.svelte b/packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/input.svelte
new file mode 100644
index 0000000000..39bf04093e
--- /dev/null
+++ b/packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/input.svelte
@@ -0,0 +1,6 @@
+{#each items as item}
+	{@const x = (item.value)}
+	{@const y = (a = item.n)}
+	{@const z = ({ a: item.a })}
+	{x}{y}{z.a}
+{/each}
diff --git a/packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/output.json b/packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/output.json
new file mode 100644
index 0000000000..3e8d8b23d5
--- /dev/null
+++ b/packages/svelte/tests/parser-modern/samples/const-tag-parenthesized-init/output.json
@@ -0,0 +1,527 @@
+{
+	"css": null,
+	"js": [],
+	"start": 0,
+	"end": 126,
+	"type": "Root",
+	"fragment": {
+		"type": "Fragment",
+		"nodes": [
+			{
+				"type": "EachBlock",
+				"start": 0,
+				"end": 126,
+				"expression": {
+					"type": "Identifier",
+					"start": 7,
+					"end": 12,
+					"loc": {
+						"start": {
+							"line": 1,
+							"column": 7
+						},
+						"end": {
+							"line": 1,
+							"column": 12
+						}
+					},
+					"name": "items"
+				},
+				"body": {
+					"type": "Fragment",
+					"nodes": [
+						{
+							"type": "Text",
+							"start": 21,
+							"end": 23,
+							"raw": "\n\t",
+							"data": "\n\t"
+						},
+						{
+							"type": "ConstTag",
+							"start": 23,
+							"end": 48,
+							"declaration": {
+								"type": "VariableDeclaration",
+								"kind": "const",
+								"declarations": [
+									{
+										"type": "VariableDeclarator",
+										"id": {
+											"type": "Identifier",
+											"name": "x",
+											"start": 31,
+											"end": 32,
+											"loc": {
+												"start": {
+													"line": 2,
+													"column": 9,
+													"character": 31
+												},
+												"end": {
+													"line": 2,
+													"column": 10,
+													"character": 32
+												}
+											}
+										},
+										"init": {
+											"type": "MemberExpression",
+											"start": 36,
+											"end": 46,
+											"loc": {
+												"start": {
+													"line": 2,
+													"column": 14
+												},
+												"end": {
+													"line": 2,
+													"column": 24
+												}
+											},
+											"object": {
+												"type": "Identifier",
+												"start": 36,
+												"end": 40,
+												"loc": {
+													"start": {
+														"line": 2,
+														"column": 14
+													},
+													"end": {
+														"line": 2,
+														"column": 18
+													}
+												},
+												"name": "item"
+											},
+											"property": {
+												"type": "Identifier",
+												"start": 41,
+												"end": 46,
+												"loc": {
+													"start": {
+														"line": 2,
+														"column": 19
+													},
+													"end": {
+														"line": 2,
+														"column": 24
+													}
+												},
+												"name": "value"
+											},
+											"computed": false,
+											"optional": false
+										},
+										"start": 31,
+										"end": 47
+									}
+								],
+								"start": 25,
+								"end": 47
+							}
+						},
+						{
+							"type": "Text",
+							"start": 48,
+							"end": 50,
+							"raw": "\n\t",
+							"data": "\n\t"
+						},
+						{
+							"type": "ConstTag",
+							"start": 50,
+							"end": 75,
+							"declaration": {
+								"type": "VariableDeclaration",
+								"kind": "const",
+								"declarations": [
+									{
+										"type": "VariableDeclarator",
+										"id": {
+											"type": "Identifier",
+											"name": "y",
+											"start": 58,
+											"end": 59,
+											"loc": {
+												"start": {
+													"line": 3,
+													"column": 9,
+													"character": 58
+												},
+												"end": {
+													"line": 3,
+													"column": 10,
+													"character": 59
+												}
+											}
+										},
+										"init": {
+											"type": "AssignmentExpression",
+											"start": 63,
+											"end": 73,
+											"loc": {
+												"start": {
+													"line": 3,
+													"column": 14
+												},
+												"end": {
+													"line": 3,
+													"column": 24
+												}
+											},
+											"operator": "=",
+											"left": {
+												"type": "Identifier",
+												"start": 63,
+												"end": 64,
+												"loc": {
+													"start": {
+														"line": 3,
+														"column": 14
+													},
+													"end": {
+														"line": 3,
+														"column": 15
+													}
+												},
+												"name": "a"
+											},
+											"right": {
+												"type": "MemberExpression",
+												"start": 67,
+												"end": 73,
+												"loc": {
+													"start": {
+														"line": 3,
+														"column": 18
+													},
+													"end": {
+														"line": 3,
+														"column": 24
+													}
+												},
+												"object": {
+													"type": "Identifier",
+													"start": 67,
+													"end": 71,
+													"loc": {
+														"start": {
+															"line": 3,
+															"column": 18
+														},
+														"end": {
+															"line": 3,
+															"column": 22
+														}
+													},
+													"name": "item"
+												},
+												"property": {
+													"type": "Identifier",
+													"start": 72,
+													"end": 73,
+													"loc": {
+														"start": {
+															"line": 3,
+															"column": 23
+														},
+														"end": {
+															"line": 3,
+															"column": 24
+														}
+													},
+													"name": "n"
+												},
+												"computed": false,
+												"optional": false
+											}
+										},
+										"start": 58,
+										"end": 74
+									}
+								],
+								"start": 52,
+								"end": 74
+							}
+						},
+						{
+							"type": "Text",
+							"start": 75,
+							"end": 77,
+							"raw": "\n\t",
+							"data": "\n\t"
+						},
+						{
+							"type": "ConstTag",
+							"start": 77,
+							"end": 105,
+							"declaration": {
+								"type": "VariableDeclaration",
+								"kind": "const",
+								"declarations": [
+									{
+										"type": "VariableDeclarator",
+										"id": {
+											"type": "Identifier",
+											"name": "z",
+											"start": 85,
+											"end": 86,
+											"loc": {
+												"start": {
+													"line": 4,
+													"column": 9,
+													"character": 85
+												},
+												"end": {
+													"line": 4,
+													"column": 10,
+													"character": 86
+												}
+											}
+										},
+										"init": {
+											"type": "ObjectExpression",
+											"start": 90,
+											"end": 103,
+											"loc": {
+												"start": {
+													"line": 4,
+													"column": 14
+												},
+												"end": {
+													"line": 4,
+													"column": 27
+												}
+											},
+											"properties": [
+												{
+													"type": "Property",
+													"start": 92,
+													"end": 101,
+													"loc": {
+														"start": {
+															"line": 4,
+															"column": 16
+														},
+														"end": {
+															"line": 4,
+															"column": 25
+														}
+													},
+													"method": false,
+													"shorthand": false,
+													"computed": false,
+													"key": {
+														"type": "Identifier",
+														"start": 92,
+														"end": 93,
+														"loc": {
+															"start": {
+																"line": 4,
+																"column": 16
+															},
+															"end": {
+																"line": 4,
+																"column": 17
+															}
+														},
+														"name": "a"
+													},
+													"value": {
+														"type": "MemberExpression",
+														"start": 95,
+														"end": 101,
+														"loc": {
+															"start": {
+																"line": 4,
+																"column": 19
+															},
+															"end": {
+																"line": 4,
+																"column": 25
+															}
+														},
+														"object": {
+															"type": "Identifier",
+															"start": 95,
+															"end": 99,
+															"loc": {
+																"start": {
+																	"line": 4,
+																	"column": 19
+																},
+																"end": {
+																	"line": 4,
+																	"column": 23
+																}
+															},
+															"name": "item"
+														},
+														"property": {
+															"type": "Identifier",
+															"start": 100,
+															"end": 101,
+															"loc": {
+																"start": {
+																	"line": 4,
+																	"column": 24
+																},
+																"end": {
+																	"line": 4,
+																	"column": 25
+																}
+															},
+															"name": "a"
+														},
+														"computed": false,
+														"optional": false
+													},
+													"kind": "init"
+												}
+											]
+										},
+										"start": 85,
+										"end": 104
+									}
+								],
+								"start": 79,
+								"end": 104
+							}
+						},
+						{
+							"type": "Text",
+							"start": 105,
+							"end": 107,
+							"raw": "\n\t",
+							"data": "\n\t"
+						},
+						{
+							"type": "ExpressionTag",
+							"start": 107,
+							"end": 110,
+							"expression": {
+								"type": "Identifier",
+								"start": 108,
+								"end": 109,
+								"loc": {
+									"start": {
+										"line": 5,
+										"column": 2
+									},
+									"end": {
+										"line": 5,
+										"column": 3
+									}
+								},
+								"name": "x"
+							}
+						},
+						{
+							"type": "ExpressionTag",
+							"start": 110,
+							"end": 113,
+							"expression": {
+								"type": "Identifier",
+								"start": 111,
+								"end": 112,
+								"loc": {
+									"start": {
+										"line": 5,
+										"column": 5
+									},
+									"end": {
+										"line": 5,
+										"column": 6
+									}
+								},
+								"name": "y"
+							}
+						},
+						{
+							"type": "ExpressionTag",
+							"start": 113,
+							"end": 118,
+							"expression": {
+								"type": "MemberExpression",
+								"start": 114,
+								"end": 117,
+								"loc": {
+									"start": {
+										"line": 5,
+										"column": 8
+									},
+									"end": {
+										"line": 5,
+										"column": 11
+									}
+								},
+								"object": {
+									"type": "Identifier",
+									"start": 114,
+									"end": 115,
+									"loc": {
+										"start": {
+											"line": 5,
+											"column": 8
+										},
+										"end": {
+											"line": 5,
+											"column": 9
+										}
+									},
+									"name": "z"
+								},
+								"property": {
+									"type": "Identifier",
+									"start": 116,
+									"end": 117,
+									"loc": {
+										"start": {
+											"line": 5,
+											"column": 10
+										},
+										"end": {
+											"line": 5,
+											"column": 11
+										}
+									},
+									"name": "a"
+								},
+								"computed": false,
+								"optional": false
+							}
+						},
+						{
+							"type": "Text",
+							"start": 118,
+							"end": 119,
+							"raw": "\n",
+							"data": "\n"
+						}
+					]
+				},
+				"context": {
+					"type": "Identifier",
+					"name": "item",
+					"start": 16,
+					"end": 20,
+					"loc": {
+						"start": {
+							"line": 1,
+							"column": 16,
+							"character": 16
+						},
+						"end": {
+							"line": 1,
+							"column": 20,
+							"character": 20
+						}
+					}
+				}
+			}
+		]
+	},
+	"options": null
+}

From a6985bcd24faa8ec4a8de671b2013d98b0bc629f Mon Sep 17 00:00:00 2001
From: "jyc.dev" <jycouet@gmail.com>
Date: Mon, 22 Jun 2026 13:03:18 +0200
Subject: [PATCH 13/15] fix: strip `?` from optional parameters in svelte lang
 ts (#18448)

In `esrap@2.2.12` we fixed the missing `?` in ts files
https://github.com/sveltejs/esrap/pull/139
It's good for `ts`, but bad for svelte compiler that was not removing it
as it was a esrap issue not printing it :/

This issue came: https://github.com/sveltejs/esrap/issues/141

This PR is fixing the issue in the compiler stripping the `?`
---
 .changeset/strip-optional-param-marker.md     |  5 +++++
 packages/svelte/package.json                  |  2 +-
 .../phases/1-parse/remove_typescript_nodes.js |  6 +++++
 .../_expected/client/index.svelte.js          | 22 +++++++++++++++++++
 .../_expected/server/index.svelte.js          | 15 +++++++++++++
 .../index.svelte                              | 14 ++++++++++++
 pnpm-lock.yaml                                | 12 +++++-----
 7 files changed, 69 insertions(+), 7 deletions(-)
 create mode 100644 .changeset/strip-optional-param-marker.md
 create mode 100644 packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/client/index.svelte.js
 create mode 100644 packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/server/index.svelte.js
 create mode 100644 packages/svelte/tests/snapshot/samples/typescript-optional-parameter/index.svelte

diff --git a/.changeset/strip-optional-param-marker.md b/.changeset/strip-optional-param-marker.md
new file mode 100644
index 0000000000..a6b759747c
--- /dev/null
+++ b/.changeset/strip-optional-param-marker.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: strip `?` from optional parameters in `<script lang="ts">` so generated JavaScript is valid
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index eeca8e032e..c1b9f44e36 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -181,7 +181,7 @@
     "clsx": "^2.1.1",
     "devalue": "^5.8.1",
     "esm-env": "^1.2.1",
-    "esrap": "^2.2.11",
+    "esrap": "^2.2.12",
     "is-reference": "^3.0.3",
     "locate-character": "^3.0.0",
     "magic-string": "^0.30.11",
diff --git a/packages/svelte/src/compiler/phases/1-parse/remove_typescript_nodes.js b/packages/svelte/src/compiler/phases/1-parse/remove_typescript_nodes.js
index 438d6fe48f..f573147367 100644
--- a/packages/svelte/src/compiler/phases/1-parse/remove_typescript_nodes.js
+++ b/packages/svelte/src/compiler/phases/1-parse/remove_typescript_nodes.js
@@ -30,6 +30,12 @@ const visitors = {
 		delete n.readonly;
 		delete n.definite;
 		delete n.override;
+
+		// `optional` is reused by JS optional chaining (`a?.b`, `a?.()`), so only
+		// strip the TypeScript optional marker (`x?: T`, `m?(): T`, `x?: T` fields)
+		if (n.type !== 'MemberExpression' && n.type !== 'CallExpression') {
+			delete n.optional;
+		}
 	},
 	Decorator(node) {
 		e.typescript_invalid_feature(node, 'decorators (related TSC proposal is not stage 4 yet)');
diff --git a/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/client/index.svelte.js b/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/client/index.svelte.js
new file mode 100644
index 0000000000..3593b6c65e
--- /dev/null
+++ b/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/client/index.svelte.js
@@ -0,0 +1,22 @@
+import 'svelte/internal/disclose-version';
+import 'svelte/internal/flags/legacy';
+import * as $ from 'svelte/internal/client';
+
+export default function Typescript_optional_parameter($$anchor) {
+	// the `?` on the optional parameter must be stripped, but optional chaining
+	// (`x?.length`, `o?.b`) must be preserved
+	function a(x) {
+		return x?.length;
+	}
+
+	const o = {};
+	const v = o?.b?.c;
+
+	a();
+	$.next();
+
+	var text = $.text();
+
+	$.template_effect(() => $.set_text(text, v));
+	$.append($$anchor, text);
+}
\ No newline at end of file
diff --git a/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/server/index.svelte.js b/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/server/index.svelte.js
new file mode 100644
index 0000000000..d6c5e271f0
--- /dev/null
+++ b/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/_expected/server/index.svelte.js
@@ -0,0 +1,15 @@
+import * as $ from 'svelte/internal/server';
+
+export default function Typescript_optional_parameter($$renderer) {
+	// the `?` on the optional parameter must be stripped, but optional chaining
+	// (`x?.length`, `o?.b`) must be preserved
+	function a(x) {
+		return x?.length;
+	}
+
+	const o = {};
+	const v = o?.b?.c;
+
+	a();
+	$$renderer.push(`<!---->${$.escape(v)}`);
+}
\ No newline at end of file
diff --git a/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/index.svelte b/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/index.svelte
new file mode 100644
index 0000000000..f6bcb53e47
--- /dev/null
+++ b/packages/svelte/tests/snapshot/samples/typescript-optional-parameter/index.svelte
@@ -0,0 +1,14 @@
+<script lang="ts">
+	// the `?` on the optional parameter must be stripped, but optional chaining
+	// (`x?.length`, `o?.b`) must be preserved
+	function a(x?: string) {
+		return x?.length;
+	}
+
+	const o: { b?: { c: number } } = {};
+	const v = o?.b?.c;
+
+	a();
+</script>
+
+{v}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e86c927efe..6331fd0789 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -102,8 +102,8 @@ importers:
         specifier: ^1.2.1
         version: 1.2.1
       esrap:
-        specifier: ^2.2.11
-        version: 2.2.11(@typescript-eslint/types@8.59.4)
+        specifier: ^2.2.12
+        version: 2.2.12(@typescript-eslint/types@8.59.4)
       is-reference:
         specifier: ^3.0.3
         version: 3.0.3
@@ -1418,8 +1418,8 @@ packages:
     resolution: {integrity: sha512-Ap6G0WQwcU/LHsvLwON1fAQX9Zp0A2Y6Y/cJBl9r/JbW90Zyg4/zbG6zzKa2OTALELarYHmKu0GhpM5EO+7T0g==}
     engines: {node: '>=0.10'}
 
-  esrap@2.2.11:
-    resolution: {integrity: sha512-gPdx+I+BjYEinNMQaBXFjbaJVyoPMU4ZODg5mE+M4DqVG9VusAVHHjcBX+zqyITlI0DIARwDMMzZwAWj36dRoQ==}
+  esrap@2.2.12:
+    resolution: {integrity: sha512-On0QbLyaiAkVC4eXtgnXK9Kh2opit+3rcUSOc45DqJ2s/X2eXAHsGOKRSJ6IDagQEW5vPyivANfXUiqgXC67Rw==}
     peerDependencies:
       '@typescript-eslint/types': ^8.2.0
     peerDependenciesMeta:
@@ -2886,7 +2886,7 @@ snapshots:
   '@jridgewell/gen-mapping@0.3.5':
     dependencies:
       '@jridgewell/set-array': 1.2.1
-      '@jridgewell/sourcemap-codec': 1.5.0
+      '@jridgewell/sourcemap-codec': 1.5.5
       '@jridgewell/trace-mapping': 0.3.31
 
   '@jridgewell/remapping@2.3.4':
@@ -3695,7 +3695,7 @@ snapshots:
     dependencies:
       estraverse: 5.3.0
 
-  esrap@2.2.11(@typescript-eslint/types@8.59.4):
+  esrap@2.2.12(@typescript-eslint/types@8.59.4):
     dependencies:
       '@jridgewell/sourcemap-codec': 1.5.5
     optionalDependencies:

From 36ae0622a8da4c6e60d32cde199af3d7c3121cd3 Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Mon, 22 Jun 2026 20:09:04 +0200
Subject: [PATCH 14/15] fix: always unset reactivity context after restoring it
 (#18453)

When calling `save`, we restore the context after the promise resolves.
But we do not unset it after the subsequent synchronous execution. That
means that until `unset_context` runs in `async_derived` we will not
have the correct (nulled) context. That causes problems if the `save`
isn't the last promise contributing to the `async_derived`, because it
means the context is not properly unset until the promise _after_ the
`save` within the `async_derived` settles. This can cause all sorts of
mixups, including a wrong mutation error.

fixes #18441
---
 .changeset/late-geese-fix.md                  |  5 +++
 .../src/internal/client/reactivity/async.js   |  2 +
 .../_config.js                                | 44 +++++++++++++++++++
 .../main.svelte                               | 28 ++++++++++++
 4 files changed, 79 insertions(+)
 create mode 100644 .changeset/late-geese-fix.md
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/_config.js
 create mode 100644 packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/main.svelte

diff --git a/.changeset/late-geese-fix.md b/.changeset/late-geese-fix.md
new file mode 100644
index 0000000000..b8e83fc8cd
--- /dev/null
+++ b/.changeset/late-geese-fix.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: always unset reactivity context after restoring it
diff --git a/packages/svelte/src/internal/client/reactivity/async.js b/packages/svelte/src/internal/client/reactivity/async.js
index 13b6e42b3e..2e7df92dc0 100644
--- a/packages/svelte/src/internal/client/reactivity/async.js
+++ b/packages/svelte/src/internal/client/reactivity/async.js
@@ -25,6 +25,7 @@ import {
 	set_reactivity_loss_tracker
 } from './deriveds.js';
 import { aborted } from './effects.js';
+import { queue_micro_task } from '../dom/task.js';
 
 /**
  * @param {Blocker[]} blockers
@@ -169,6 +170,7 @@ export async function save(promise) {
 
 	return () => {
 		restore();
+		queue_micro_task(unset_context);
 		return value;
 	};
 }
diff --git a/packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/_config.js b/packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/_config.js
new file mode 100644
index 0000000000..9650e88993
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/_config.js
@@ -0,0 +1,44 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	mode: ['client'],
+
+	compileOptions: {
+		dev: true
+	},
+
+	async test({ assert, target, errors }) {
+		await tick();
+		const [increment, update, resolve] = target.querySelectorAll('button');
+
+		increment.click();
+		await tick();
+
+		resolve.click();
+		await tick();
+
+		update.click();
+		await tick();
+
+		resolve.click();
+		await tick();
+
+		assert.deepEqual(
+			errors.filter((error) => error.includes('state_unsafe_mutation')),
+			[]
+		);
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>increment</button>
+				<button>update</button>
+				<button>resolve</button>
+				<p>count: 1</p>	
+				<p>submits: 1</p>	
+				<p>pending: 0</p>	
+				<p>2</p>	
+			`
+		);
+	}
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/main.svelte b/packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/main.svelte
new file mode 100644
index 0000000000..d9c804b314
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/async-parallel-derived-template-mutation/main.svelte
@@ -0,0 +1,28 @@
+<script>
+	const queued = [];
+
+	function push(value) {
+		if(!value) return value;
+		return new Promise((resolve) => queued.push(() => resolve(value)));
+	}
+
+	let count = $state(0);
+	let submits = $state(0);
+
+	const a = $derived(push(count));
+	const b = $derived(push(count));
+
+	async function updateAfterPromise() {
+		await Promise.resolve(); 
+		submits += 1;
+	}
+</script>
+
+<button onclick={() => (count += 1)}>increment</button>
+<button onclick={updateAfterPromise}>update</button>
+<button onclick={() => queued.shift()?.()}>resolve</button>
+
+<p>count: {count}</p>
+<p>submits: {submits}</p>
+<p>pending: {$effect.pending()}</p>
+<p>{await a + await b}</p>

From eae50dfd1c2269e37258ef5c09527003bcf61573 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Tue, 23 Jun 2026 14:44:52 -0400
Subject: [PATCH 15/15] Version Packages (#18435)

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to main, this PR will
be updated.


# Releases
## svelte@5.56.4

### Patch Changes

- fix: include wrapping parentheses in `{@const}` declarator `end`
position ([#18436](https://github.com/sveltejs/svelte/pull/18436))

- fix: always unset reactivity context after restoring it
([#18453](https://github.com/sveltejs/svelte/pull/18453))

- fix: don't notify `searchParams` subscribers when the URL changes
without affecting the search string
([#18425](https://github.com/sveltejs/svelte/pull/18425))

- fix: strip `?` from optional parameters in `<script lang="ts">` so
generated JavaScript is valid
([#18448](https://github.com/sveltejs/svelte/pull/18448))

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 .changeset/clean-melons-attack.md         |  5 -----
 .changeset/late-geese-fix.md              |  5 -----
 .changeset/quick-meals-shout.md           |  5 -----
 .changeset/strip-optional-param-marker.md |  5 -----
 packages/svelte/CHANGELOG.md              | 12 ++++++++++++
 packages/svelte/package.json              |  2 +-
 packages/svelte/src/version.js            |  2 +-
 7 files changed, 14 insertions(+), 22 deletions(-)
 delete mode 100644 .changeset/clean-melons-attack.md
 delete mode 100644 .changeset/late-geese-fix.md
 delete mode 100644 .changeset/quick-meals-shout.md
 delete mode 100644 .changeset/strip-optional-param-marker.md

diff --git a/.changeset/clean-melons-attack.md b/.changeset/clean-melons-attack.md
deleted file mode 100644
index 8b5a9f2066..0000000000
--- a/.changeset/clean-melons-attack.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: include wrapping parentheses in `{@const}` declarator `end` position
diff --git a/.changeset/late-geese-fix.md b/.changeset/late-geese-fix.md
deleted file mode 100644
index b8e83fc8cd..0000000000
--- a/.changeset/late-geese-fix.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: always unset reactivity context after restoring it
diff --git a/.changeset/quick-meals-shout.md b/.changeset/quick-meals-shout.md
deleted file mode 100644
index 21871edd67..0000000000
--- a/.changeset/quick-meals-shout.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: don't notify `searchParams` subscribers when the URL changes without affecting the search string
diff --git a/.changeset/strip-optional-param-marker.md b/.changeset/strip-optional-param-marker.md
deleted file mode 100644
index a6b759747c..0000000000
--- a/.changeset/strip-optional-param-marker.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'svelte': patch
----
-
-fix: strip `?` from optional parameters in `<script lang="ts">` so generated JavaScript is valid
diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index 02dd84ddff..80b61facb0 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,17 @@
 # svelte
 
+## 5.56.4
+
+### Patch Changes
+
+- fix: include wrapping parentheses in `{@const}` declarator `end` position ([#18436](https://github.com/sveltejs/svelte/pull/18436))
+
+- fix: always unset reactivity context after restoring it ([#18453](https://github.com/sveltejs/svelte/pull/18453))
+
+- fix: don't notify `searchParams` subscribers when the URL changes without affecting the search string ([#18425](https://github.com/sveltejs/svelte/pull/18425))
+
+- fix: strip `?` from optional parameters in `<script lang="ts">` so generated JavaScript is valid ([#18448](https://github.com/sveltejs/svelte/pull/18448))
+
 ## 5.56.3
 
 ### Patch Changes
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index c1b9f44e36..34fa68c8a7 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.56.3",
+  "version": "5.56.4",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index b6d4236ff8..ef468a2f79 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -4,5 +4,5 @@
  * The current version, as set in package.json.
  * @type {string}
  */
-export const VERSION = '5.56.3';
+export const VERSION = '5.56.4';
 export const PUBLIC_VERSION = '5';