class method Element.retrieve
Element.retrieve(element, key[, defaultValue]) → ?
Retrieves custom metadata set on element
with Element.store
.
If the value is undefined
and defaultValue
is given, it will be
stored on the element as its new value for that key, then returned.
This method can be called either as an instance method or as a generic method. If calling as a generic, pass the instance in as the first argument.