diff --git a/packages/syntax-playground/src/echo-server-syndicate-js.js b/packages/syntax-playground/src/echo-server-syndicate-js.js
new file mode 100644
index 0000000..284204a
--- /dev/null
+++ b/packages/syntax-playground/src/echo-server-syndicate-js.js
@@ -0,0 +1,10 @@
+const S = activate require("@syndicate-lang/driver-streams-node");
+
+spawn named 'echoserver' {
+  on asserted S.Stream($id, S.Incoming(S.TcpListener(5999))) {
+    spawn {
+      stop on retracted S.Stream(id, S.Duplex());
+      on message S.Stream(id, S.Data($bs)) send S.Stream(id, S.Push(bs, false));
+    }
+  }
+}