From 21dadfc997c5572730e607bd98d513437215dd06 Mon Sep 17 00:00:00 2001
From: Caique Torres <56696506+caiquetorres@users.noreply.github.com>
Date: Wed, 12 Feb 2025 14:14:14 -0300
Subject: [PATCH] fix: ignore typescript abstract methods during code
 transformation (#15267)

---
 .changeset/short-fireants-talk.md                           | 5 +++++
 .../src/compiler/phases/1-parse/remove_typescript_nodes.js  | 6 ++++++
 .../tests/runtime-runes/samples/typescript/main.svelte      | 5 +++++
 3 files changed, 16 insertions(+)
 create mode 100644 .changeset/short-fireants-talk.md

diff --git a/.changeset/short-fireants-talk.md b/.changeset/short-fireants-talk.md
new file mode 100644
index 000000000000..c26bdc9c8ba8
--- /dev/null
+++ b/.changeset/short-fireants-talk.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: ignore typescript abstract methods
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 18c805128dfe..09eb0bfa68c1 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
@@ -118,6 +118,12 @@ const visitors = {
 		delete node.implements;
 		return context.next();
 	},
+	MethodDefinition(node, context) {
+		if (node.abstract) {
+			return b.empty;
+		}
+		return context.next();
+	},
 	VariableDeclaration(node, context) {
 		if (node.declare) {
 			return b.empty;
diff --git a/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte b/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
index cd23b31096c3..e2942b21f386 100644
--- a/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
+++ b/packages/svelte/tests/runtime-runes/samples/typescript/main.svelte
@@ -22,6 +22,11 @@
 
 	class MyClass implements Hello {}
 
+	abstract class MyAbstractClass {
+		abstract x(): void;
+		y() {}
+	}
+
 	declare const declared_const: number;
 	declare function declared_fn(): void;
 	declare class declared_class {