The optional displayName property of a Function instance specifies the display name of the function.

The fileName data property of an Error instance contains the path to the file that raised this error.

The AggregateError() constructor creates AggregateError objects.

The Object.isExtensible() static method determines if an object is extensible (whether it can have new properties added to it).

The handler.apply() method is a trap for the [[Call]] object internal method, which is used by operations such as function calls.

The Reflect.isExtensible() static method is like Object.isExtensible(). It determines if an object is extensible (whether it can have new properties added to it).

The handler.deleteProperty() method is a trap for the [[Delete]] object internal method, which is used by operations such as the delete operator.

The handler.isExtensible() method is a trap for the [[IsExtensible]] object internal method, which is used by operations such as Object.isExtensible().

The name data property of Error.prototype is shared by all Error instances. It represents the name for the type of error. For Error.prototype.name, the initial value is "Error". Subclasses like TypeError and SyntaxError provide their own name properties.

The toLocaleString() method of Object instances returns a string representing this object. This method is meant to be overridden by derived objects for locale-specific purposes.