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Mention callback argument count in The JavaScript bridge singleton #10162

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Oct 29, 2024
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Mention callback argument count in The JavaScript bridge singleton #10162

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8 changes: 7 additions & 1 deletion tutorials/platform/web/javascript_bridge.rst
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
.. _doc_web_javascript_bridge:

The JavaScriptBridge Singleton
The JavaScriptBridge singleton
==============================

In web builds, the :ref:`JavaScriptBridge <class_JavaScriptBridge>` singleton
Expand Down Expand Up @@ -93,6 +93,12 @@ Arguments passed by JavaScript to the callback will be passed as a single Godot
js_event.preventDefault()
js_event.returnValue = ''

.. warning::

The number of arguments accepted by the callback method (``_my_callback`` in the above example)
**must** match the number of arguments sent by JavaScript. Otherwise, the callback method will
not be called.

Here is another example that asks the user for the `Notification permission <https://developer.mozilla.org/en-US/docs/Web/API/Notifications_API>`__
and waits asynchronously to deliver a notification if the permission is
granted:
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