fix: strip exported TypeScript function overloads (#14458)

fixes #14455
sveltejs · Nov 28, 2024 · d6fc176 · d6fc176
1 parent 41e47a4
commit d6fc176
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diff --git a/.changeset/shy-starfishes-type.md b/.changeset/shy-starfishes-type.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: strip exported TypeScript function overloads
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
@@ -36,7 +36,11 @@ const visitors = {
 		if (node.exportKind === 'type') return b.empty;
 
 		if (node.declaration) {
-			return context.next();
+			const result = context.next();
+			if (result?.declaration?.type === 'EmptyStatement') {
+				return b.empty;
+			}
+			return result;
 		}
 
 		if (node.specifiers) {

diff --git a/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte b/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
@@ -27,6 +27,10 @@
 		export type Foo = true
 	}
 
+	export function overload(a: boolean): boolean;
+	export function overload(b: string): number;
+	export function overload(c: any): any {}
+
 	export type { Hello };
 </script>