From 48100c323db22d5eea36aa38dbe0db289333f76c Mon Sep 17 00:00:00 2001
From: fisker Cheung <lionkay@gmail.com>
Date: Fri, 31 Oct 2025 09:33:19 +0800
Subject: [PATCH] Fix duplicated comments on `prettier-ignored` super class
 (#18168)

---
 src/language-js/comments/printer-methods.js   | 24 +++++++------------
 .../__snapshots__/format.test.js.snap         |  6 +++++
 tests/format/js/class-comment/superclass.js   |  3 +++
 3 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/src/language-js/comments/printer-methods.js b/src/language-js/comments/printer-methods.js
index 94488069c..e3dacf575 100644
--- a/src/language-js/comments/printer-methods.js
+++ b/src/language-js/comments/printer-methods.js
@@ -151,32 +151,26 @@ function canAttachComment(node, ancestors) {
  * @returns {boolean}
  */
 function willPrintOwnComments(path) {
-  const { node, parent, key } = path;
+  const { key, parent } = path;
   if (
     (key === "types" && isUnionType(parent)) ||
     (key === "argument" && parent.type === "JSXSpreadAttribute") ||
-    (key === "expression" && parent.type === "JSXSpreadChild")
+    (key === "expression" && parent.type === "JSXSpreadChild") ||
+    (key === "superClass" &&
+      (parent.type === "ClassDeclaration" ||
+        parent.type === "ClassExpression")) ||
+    // Not tested, don't know how to
+    (key === "patterns" && parent.type === "MatchOrPattern")
   ) {
     return true;
   }
 
+  const { node } = path;
   if (hasNodeIgnoreComment(node)) {
     return false;
   }
 
-  if (isJsxElement(node) || isUnionType(node)) {
-    return true;
-  }
-
-  if (!parent) {
-    return false;
-  }
-
-  return (
-    parent.type === "MatchOrPattern" ||
-    (path.key === "superClass" &&
-      (parent.type === "ClassDeclaration" || parent.type === "ClassExpression"))
-  );
+  return isJsxElement(node) || isUnionType(node);
 }
 
 function isGap(text, { parser }) {
diff --git a/tests/format/js/class-comment/__snapshots__/format.test.js.snap b/tests/format/js/class-comment/__snapshots__/format.test.js.snap
index 89ece48df..56c10ff5c 100644
--- a/tests/format/js/class-comment/__snapshots__/format.test.js.snap
+++ b/tests/format/js/class-comment/__snapshots__/format.test.js.snap
@@ -97,6 +97,9 @@ class C2  // comment
 extends Base
 {  foo(){} }
 
+(class A10 extends /* a */ /* prettier-ignore */B {});
+class A10 extends /* a */ /* prettier-ignore */B {}
+
 =====================================output=====================================
 class A // comment 1
 // comment 2
@@ -142,5 +145,8 @@ class C2 // comment
   foo() {}
 }
 
+(class A10 extends /* a */ /* prettier-ignore */ B {});
+class A10 extends /* a */ /* prettier-ignore */ B {}
+
 ================================================================================
 `;
diff --git a/tests/format/js/class-comment/superclass.js b/tests/format/js/class-comment/superclass.js
index f6492b8c3..143b2c32e 100644
--- a/tests/format/js/class-comment/superclass.js
+++ b/tests/format/js/class-comment/superclass.js
@@ -38,3 +38,6 @@ class c extends d
 class C2  // comment
 extends Base
 {  foo(){} }
+
+(class A10 extends /* a */ /* prettier-ignore */B {});
+class A10 extends /* a */ /* prettier-ignore */B {}