Form work

packages/effect-fc/src/Form.ts

@@ -183,9 +183,13 @@ export const field: {
     path: P,
 ) {
     return new FormFieldImpl(
-        SubscribableInternal.make({
-
-        })
+        pipe(
+            (value: Option.Option<A>) => Option.map(value, v => PropertyPath.get(v, path)),
+            filter => SubscribableInternal.make({
+                get: Effect.flatMap(self.valueRef, filter),
+                get changes() { return Stream.flatMap(self.valueRef.changes, filter) },
+            }),
+        )
     )
 })