From 2a219af308aada16b8d314a2b0b98a4bb06f2a9b Mon Sep 17 00:00:00 2001
From: Andy <anhans@microsoft.com>
Date: Mon, 17 Jul 2017 12:56:16 -0700
Subject: [PATCH] convertFunctionToEs6Class: Bail if this is not a JavaScript
 file (#17149)

---
 src/services/refactors/convertFunctionToEs6Class.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/services/refactors/convertFunctionToEs6Class.ts b/src/services/refactors/convertFunctionToEs6Class.ts
index a570ef1f2b8..2fb67ea98e8 100644
--- a/src/services/refactors/convertFunctionToEs6Class.ts
+++ b/src/services/refactors/convertFunctionToEs6Class.ts
@@ -12,7 +12,11 @@ namespace ts.refactor {
 
     registerRefactor(convertFunctionToES6Class);
 
-    function getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] {
+    function getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined {
+        if (!isInJavaScriptFile(context.file)) {
+            return undefined;
+        }
+
         const start = context.startPosition;
         const node = getTokenAtPosition(context.file, start, /*includeJsDocComment*/ false);
         const checker = context.program.getTypeChecker();