minor #20580 [Mercure] Adding hint for multiple topics (ThomasLandauer)

javiereguiluz · javiereguiluz · commit 33dee6f331ec · 2025-01-21T09:02:57.000+01:00
This PR was merged into the 6.4 branch. Discussion ---------- [Mercure] Adding hint for multiple topics Page: https://symfony.com/doc/6.4/mercure.html#subscribing Closes #20574 Closes symfony/mercure-bundle#71 Closes symfony/mercure-bundle#82 Info is taken from #20574 (comment) Commits ------- 3dca32e [Mercure] Adding hint for multiple topics
diff --git a/mercure.rst b/mercure.rst
@@ -309,6 +309,11 @@ as patterns:
     }
     </script>
 
+However, on the client side (i.e. in JavaScript's ``EventSource``), there is no built-in way
+to see which topic a certain message is coming from. So if this (or any other meta information)
+is important to you, you need to include it in the message's data (e.g. by adding a key to the
+JSON, or a `data-*` attribute to the HTML).
+
 .. tip::
 
     Test if a URI Template matches a URL using `the online debugger`_
