From 561ed8f3d955460853d72cf070cdaf23691217a0 Mon Sep 17 00:00:00 2001
From: Jayden Carey <jaydenaus9@gmail.com>
Date: Thu, 23 Jan 2025 13:11:21 +0800
Subject: [PATCH] update type

---
 packages/svelte/elements.d.ts                              | 4 +++-
 packages/svelte/src/attachments/public.d.ts                | 7 ++++++-
 .../phases/3-transform/client/visitors/shared/component.js | 2 +-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/packages/svelte/elements.d.ts b/packages/svelte/elements.d.ts
index 7b67e2a07ebd..cb1df6ddebab 100644
--- a/packages/svelte/elements.d.ts
+++ b/packages/svelte/elements.d.ts
@@ -31,6 +31,8 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
+import { AttachmentsKey } from 'svelte/attachments';
+
 // Note: We also allow `null` as a valid value because Svelte treats this the same as `undefined`
 
 type Booleanish = boolean | 'true' | 'false';
@@ -861,7 +863,7 @@ export interface HTMLAttributes<T extends EventTarget> extends AriaAttributes, D
 	[key: `data-${string}`]: any;
 
 	// allow any attachment
-	[key: symbol]: (node: T) => void | (() => void);
+	[AttachmentsKey]: Array<(node: T) => void | (() => void)>;
 }
 
 export type HTMLAttributeAnchorTarget = '_self' | '_blank' | '_parent' | '_top' | (string & {});
diff --git a/packages/svelte/src/attachments/public.d.ts b/packages/svelte/src/attachments/public.d.ts
index 7685151ab4b1..fe3811816b1c 100644
--- a/packages/svelte/src/attachments/public.d.ts
+++ b/packages/svelte/src/attachments/public.d.ts
@@ -1,4 +1,9 @@
+declare const brand: unique symbol;
+type Brand<B> = { [brand]: B };
+type Branded<T, B> = T & Brand<B>;
+type AttachmentsKeySymbol = Branded<symbol, 'svelte.attachments'>;
+
 /**
  * A unique symbol used for defining the attachments to be applied to an element or component.
  */
-export const AttachmentsKey: unique symbol;
+export const AttachmentsKey: AttachmentsKeySymbol;
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js
index 47b7b4436878..9621f29f7585 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js
@@ -267,7 +267,7 @@ export function build_component(node, component_name, context, anchor = context.
 				push_prop(
 					b.prop(
 						'get',
-						b.call('Symbol'),
+						b.call("Symbol.for('svelte.attachments')"),
 						/** @type {Expression} */ (
 							context.visit(attachment.type === 'SpreadElement' ? attachment.argument : attachment)
 						),