Readonly asyncA method that returns the default async iterator for an object. Called by the semantics of the for-await-of statement.
Readonly hasA method that determines if a constructor object recognizes an object as one of the constructor’s instances. Called by the semantics of the instanceof operator.
Readonly isA Boolean value that if true indicates that an object should flatten to its array elements by Array.prototype.concat.
Readonly iteratorA method that returns the default iterator for an object. Called by the semantics of the for-of statement.
Readonly matchA regular expression method that matches the regular expression against a string. Called by the String.prototype.match method.
Readonly matchA regular expression method that matches the regular expression against a string. Called by the String.prototype.matchAll method.
Readonly prototypeA reference to the prototype.
Readonly replaceA regular expression method that replaces matched substrings of a string. Called by the String.prototype.replace method.
Readonly searchA regular expression method that returns the index within a string that matches the regular expression. Called by the String.prototype.search method.
Readonly speciesA function valued property that is the constructor function that is used to create derived objects.
Readonly splitA regular expression method that splits a string at the indices that match the regular expression. Called by the String.prototype.split method.
Readonly toA method that converts an object to a corresponding primitive value. Called by the ToPrimitive abstract operation.
Readonly toA String value that is used in the creation of the default string description of an object. Called by the built-in method Object.prototype.toString.
Readonly unscopablesAn Object whose truthy properties are properties that are excluded from the 'with' environment bindings of the associated objects.
Returns a new unique Symbol value.