From 34fab40303e8e7db2ea6c20dffb150ff01ca4428 Mon Sep 17 00:00:00 2001
From: Dunqing <29533304+Dunqing@users.noreply.github.com>
Date: Mon, 27 Oct 2025 09:32:54 +0000
Subject: [PATCH] fix(formatter): correct calculating layout for
 `ChainExpression` in `StaticMemberExpression` (#14986)

---
 .../oxc_formatter/src/write/member_expression.rs   |  4 +++-
 .../fixtures/ts/static-members/chain-expression.ts |  3 +++
 .../ts/static-members/chain-expression.ts.snap     | 14 ++++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts
 create mode 100644 crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts.snap

diff --git a/crates/oxc_formatter/src/write/member_expression.rs b/crates/oxc_formatter/src/write/member_expression.rs
index 64f1c603ea7b7..b1f87cae15f2e 100644
--- a/crates/oxc_formatter/src/write/member_expression.rs
+++ b/crates/oxc_formatter/src/write/member_expression.rs
@@ -141,7 +141,9 @@ fn layout<'a>(
     let mut first_non_static_member_ancestor = parent;
     while matches!(
         first_non_static_member_ancestor,
-        AstNodes::StaticMemberExpression(_) | AstNodes::ComputedMemberExpression(_)
+        AstNodes::StaticMemberExpression(_)
+            | AstNodes::ComputedMemberExpression(_)
+            | AstNodes::ChainExpression(_)
     ) {
         first_non_static_member_ancestor = first_non_static_member_ancestor.parent();
     }
diff --git a/crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts b/crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts
new file mode 100644
index 0000000000000..497eb4dab9a08
--- /dev/null
+++ b/crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts
@@ -0,0 +1,3 @@
+this._position = this._editor
+  ._getViewModel()
+  ?.getPrimaryCursorState().modelState.position;
diff --git a/crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts.snap b/crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts.snap
new file mode 100644
index 0000000000000..a815e07b2f4ed
--- /dev/null
+++ b/crates/oxc_formatter/tests/fixtures/ts/static-members/chain-expression.ts.snap
@@ -0,0 +1,14 @@
+---
+source: crates/oxc_formatter/tests/fixtures/mod.rs
+---
+==================== Input ====================
+this._position = this._editor
+  ._getViewModel()
+  ?.getPrimaryCursorState().modelState.position;
+
+==================== Output ====================
+this._position = this._editor
+  ._getViewModel()
+  ?.getPrimaryCursorState().modelState.position;
+
+===================== End =====================