From e1b122025ffce2d37333f449654a91c498d61092 Mon Sep 17 00:00:00 2001
From: Raphael Fakhri <153192858+RaphaelFakhri@users.noreply.github.com>
Date: Thu, 22 Oct 2026 12:48:28 +0000
Subject: [PATCH] fix(json): keep comma after an empty slog group

---
 json.go            | 2 ++
 logger_121_test.go | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/json.go b/json.go
index 9833f16..0a72c2d 100644
--- a/json.go
+++ b/json.go
@@ -82,11 +82,13 @@ func (l *Logger) jsonFormatterItem(jw *jsonWriter, key, value any) {
 func (l *Logger) writeSlogValue(jw *jsonWriter, v slogValue) {
 	switch v.Kind() {
 	case slogKindGroup:
+		d := jw.d
 		jw.start()
 		for _, attr := range v.Group() {
 			l.jsonFormatterItem(jw, attr.Key, attr.Value)
 		}
 		jw.end()
+		jw.d = d
 	default:
 		a := v.Any()
 		_, jm := a.(json.Marshaler)
diff --git a/logger_121_test.go b/logger_121_test.go
index 44815b7..bd09e1e 100644
--- a/logger_121_test.go
+++ b/logger_121_test.go
@@ -256,6 +256,14 @@ func TestSlogAttr(t *testing.T) {
 				)},
 			},
 		},
+		{
+			name:     "log valuer empty group",
+			expected: `{"level":"info","msg":"message","lv":{},"k":"v"}` + "\n",
+			kvs: []any{
+				"lv", testLogValue{slog.GroupValue()},
+				"k", "v",
+			},
+		},
 	}
 
 	for _, c := range cases {