2.1.57 [ECMA-262/9:2018] Section 25.2.3.3 GeneratorFunction.prototype [ @@toStringTag ]

V0218: GeneratorFunction.prototype[@@toStringTag] is not implemented because the @@toStringTag feature is not implemented

The specification states:

 25.2.3.3 Generator.prototype [ @@toStringTag ]
  
     The initial value of the @@toStringTag property is the String value 
     "GeneratorFunction".
  
     This property has the attributes { [[Writable]]: false, [[Enumerable]]: false, 
     [[Configurable]]: true }.

EdgeHTML Mode

GeneratorFunction.prototype[@@toStringTag] is not implemented because the @@toStringTag feature is not implemented.