key of data-attributes

operator

Return type:
String
Returns:
Returns the name of the attribute.
Syntax
key of specified? data-attributes of attribute-reference? [numeric-expression]


Purpose

The key of data-attributes operator returns the "true" name of the data-attribute. This is most useful when retrieving the real name of an data-attribute that is being referenced through an alias. The name is uppercased when the SGML declaration specifies NAMECASE GENERAL YES for the SGML document being processed.

When key of is applied to data-attributes, the item indexer is required.

Related Syntax