fix: prevent unintended exports from namespaces (#17562)

.changeset/stale-words-count.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: prevent unintended exports from namespaces

packages/svelte/src/ambient.d.ts

@@ -173,6 +173,9 @@ declare namespace $state {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -230,6 +233,9 @@ declare namespace $derived {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -346,6 +352,9 @@ declare namespace $effect {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -389,6 +398,9 @@ declare namespace $props {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -423,6 +435,9 @@ declare namespace $bindable {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -485,6 +500,9 @@ declare namespace $inspect {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -529,4 +547,7 @@ declare namespace $host {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }

packages/svelte/types/index.d.ts

@@ -3345,6 +3345,9 @@ declare namespace $state {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -3402,6 +3405,9 @@ declare namespace $derived {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -3518,6 +3524,9 @@ declare namespace $effect {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -3561,6 +3570,9 @@ declare namespace $props {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -3595,6 +3607,9 @@ declare namespace $bindable {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -3657,6 +3672,9 @@ declare namespace $inspect {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
 /**
@@ -3701,6 +3719,9 @@ declare namespace $host {
 	export const prototype: never;
 	/** @deprecated */
 	export const toString: never;
+
+	// needed to keep private stuff private
+	export {};
 }
 
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