add note on middleware support (#1056)

niallzato · web-flow · commit ced2485424c0 · 2020-08-24T11:27:07.000-06:00
reviewed and approved by: Irina
diff --git a/src/connections/sources/catalog/libraries/website/javascript/middleware.md b/src/connections/sources/catalog/libraries/website/javascript/middleware.md
@@ -53,6 +53,9 @@ var DMW1 = function({ payload, integration, next }) {
 };
 ```
 
+> note ""
+> Currently only Device-mode Destinations are supported by Destination Middlewares 
+
 ## Adding middlewares to Analytics.js
 
 The above defined Source & Destination Middleware can be added to the Analytics.js execution chain as:
