[BUGFIX] Configure additional attributes with "includeJS"

Resolves: #788
Related: https://forge.typo3.org/issues/100954
Releases: main, 12.4

Documentation/Setup/Page/Index.rst

@@ -696,7 +696,8 @@ includeJS.[array]
 
          ..  versionadded:: 12.1
 
-         Additional data attributes can be configured using a key-value list.
+         Additional attributes can be configured using a key-value list using
+         the :typoscript:`data` key.
 
    Example
          .. code-block:: typoscript
@@ -712,9 +713,14 @@ includeJS.[array]
 
                 # Include another file for consent management
                 # A data attribute enriches the tag with additional information
-                # which can be used in the according JavaScript
+                # which can be used in the according JavaScript.
+                # This results in "<script data-consent-type="essential" ...></script>"
                 consent = EXT:site_package/Resources/Public/JavaScript/consent.js
-                consent.data-consent-type = essential
+                consent.data.data-consent-type = essential
+
+                # Another attribute can also be defined also with the "data" key.
+                # This results in "<script other-attribute="value" ...></script>"
+                consent.data.other-attribute = value
 
                 jquery = https://code.jquery.com/jquery-3.4.1.min.js
                 jquery.external = 1