has
Checks whether this JavaScript object or any of its prototypes has an enumerable property with the given name.
Return
true if object has property with the given name
Parameters
name
the name of the property
Throws
when name is empty or blank
when the JavaScript object is already disposed or invalid
Checks whether this JavaScript object or any of its prototypes has a property with the given jsSymbol key.
Return
true if object has property with the given jsSymbol
Since
8.13.0
Parameters
js
a symbol that represents the property key
Throws
when jsSymbol is from a different web page or frame
when the JavaScript object or jsSymbol is already disposed or invalid