diff --git a/dom/src/main/scala/top/davidon/sfs/dom/AsValue.scala b/dom/src/main/scala/top/davidon/sfs/dom/AsValue.scala
new file mode 100644
index 0000000..a1c2eda
--- /dev/null
+++ b/dom/src/main/scala/top/davidon/sfs/dom/AsValue.scala
@@ -0,0 +1,7 @@
+package top.davidon.sfs.dom
+
+trait AsValue[F, T] {
+  extension (from: F) {
+    def asStringValue(): Value[F, String]
+  }
+}
diff --git a/dom/src/main/scala/top/davidon/sfs/dom/Value.scala b/dom/src/main/scala/top/davidon/sfs/dom/Value.scala
index 9f73f32..78c1efd 100644
--- a/dom/src/main/scala/top/davidon/sfs/dom/Value.scala
+++ b/dom/src/main/scala/top/davidon/sfs/dom/Value.scala
@@ -17,12 +17,6 @@ class Value[F, T](
   }
 }
 
-trait AsValue[F, T] {
-  extension (from: F) {
-    def asStringValue(): Value[F, String]
-  }
-}
-
 object Value {
   def join(
       iterator: Iterable[Value[?, String]]