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[Mercure] Adding hint for multiple topics #20580

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Jan 21, 2025
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[Mercure] Adding hint for multiple topics #20580

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5 changes: 5 additions & 0 deletions mercure.rst
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Expand Up @@ -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`_
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