From 6cdc4b0567cf6bf0ad8bca56661bd0910417c76d Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Sat, 16 Mar 2024 13:17:23 -0400
Subject: [PATCH 1/2] use type arguments when extending Map/Set

---
 packages/svelte/src/reactivity/map.js |  1 +
 packages/svelte/src/reactivity/set.js |  1 +
 packages/svelte/types/index.d.ts      | 24 ++----------------------
 3 files changed, 4 insertions(+), 22 deletions(-)

diff --git a/packages/svelte/src/reactivity/map.js b/packages/svelte/src/reactivity/map.js
index f57f52e7b747..758d64bebc7d 100644
--- a/packages/svelte/src/reactivity/map.js
+++ b/packages/svelte/src/reactivity/map.js
@@ -7,6 +7,7 @@ import { map } from './utils.js';
 /**
  * @template K
  * @template V
+ * @extends {Map<K, V>}
  */
 export class ReactiveMap extends Map {
 	/** @type {Map<K, import('#client').Source<V>>} */
diff --git a/packages/svelte/src/reactivity/set.js b/packages/svelte/src/reactivity/set.js
index ca969bea9c10..c559fba6d532 100644
--- a/packages/svelte/src/reactivity/set.js
+++ b/packages/svelte/src/reactivity/set.js
@@ -10,6 +10,7 @@ var inited = false;
 
 /**
  * @template T
+ * @extends {Set<T>}
  */
 export class ReactiveSet extends Set {
 	/** @type {Map<T, import('#client').Source<boolean>>} */
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index c2b1c1ad5baf..222f14d673e2 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -1812,38 +1812,18 @@ declare module 'svelte/reactivity' {
 		constructor(...values: any[]);
 		#private;
 	}
-	export class Set<T> extends Set<any> {
+	export class Set<T> extends Set<T> {
 		
 		constructor(value?: Iterable<T> | null | undefined);
 		
-		has(value: T): boolean;
-		
 		add(value: T): this;
-		
-		delete(value: T): boolean;
-		keys(): IterableIterator<T>;
-		values(): IterableIterator<T>;
-		entries(): IterableIterator<[T, T]>;
-		[Symbol.iterator](): IterableIterator<T>;
 		#private;
 	}
-	export class Map<K, V> extends Map<any, any> {
+	export class Map<K, V> extends Map<K, V> {
 		
 		constructor(value?: Iterable<readonly [K, V]> | null | undefined);
 		
-		has(key: K): boolean;
-		
-		forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, this_arg?: any): void;
-		
-		get(key: K): V | undefined;
-		
 		set(key: K, value: V): this;
-		
-		delete(key: K): boolean;
-		keys(): IterableIterator<K>;
-		values(): IterableIterator<V>;
-		entries(): IterableIterator<[K, V]>;
-		[Symbol.iterator](): IterableIterator<[K, V]>;
 		#private;
 	}
 }

From 86a21b100e4745517adb9ec082e4489f536a0768 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Mon, 22 Apr 2024 07:56:32 -0400
Subject: [PATCH 2/2] changeset

---
 .changeset/silent-hats-stare.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/silent-hats-stare.md

diff --git a/.changeset/silent-hats-stare.md b/.changeset/silent-hats-stare.md
new file mode 100644
index 000000000000..3294f491ce6d
--- /dev/null
+++ b/.changeset/silent-hats-stare.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: add type arguments to Map and Set