From 7785cba61fcb678618e9e456c178ad4af3693457 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Thu, 23 Apr 2026 19:28:31 +0300
Subject: [PATCH] jsgen: fix Javascript cross compilation error (fixes #24784)

---
 .gitignore                                                  | 4 ++++
 .../gen/js/tests/testdata/comptime_if_expr_issue_24784.out  | 1 +
 vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.v | 6 ++++++
 3 files changed, 11 insertions(+)
 create mode 100644 vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.out
 create mode 100644 vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.v

diff --git a/.gitignore b/.gitignore
index 2e39368c1..a751643b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,10 @@
 !vlib/v/gen/c/testdata/*.c
 !vlib/v/gen/c/testdata/*.c.must_have
 
+# unignore targeted js backend regression testdata files
+!vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.v
+!vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.out
+
 # unignore vlib/x/markdown
 !vlib/x/markdown/**
 !vlib/mcp/server.v
diff --git a/vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.out b/vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.out
new file mode 100644
index 000000000..86c27bb49
--- /dev/null
+++ b/vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.out
@@ -0,0 +1 @@
+Hello, Node user!
diff --git a/vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.v b/vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.v
new file mode 100644
index 000000000..0a823ae00
--- /dev/null
+++ b/vlib/v/gen/js/tests/testdata/comptime_if_expr_issue_24784.v
@@ -0,0 +1,6 @@
+module main
+
+fn main() {
+	backend := $if js_node { 'Node' } $else { 'Other' }
+	println('Hello, ${backend} user!')
+}
-- 
2.39.5