getAttributeNames method
The getAttributeNames() method of the
Element interface returns the attribute names of the element as an
Array of strings. If the element has no attributes it returns an empty
array.
Using getAttributeNames() along with
Element.getAttribute, is a memory-efficient and
performant alternative to accessing Element.attributes.
The names returned by getAttributeNames() are qualified attribute
names, meaning that attributes with a namespace prefix have their names
returned with that namespace prefix (not the actual namespace), followed
by a colon, followed by the attribute name (for example,
xlink:href), while any attributes which have no namespace prefix
have their names returned as-is (for example, href).
Implementation
external JSArray<JSString> getAttributeNames();