The Iterator() constructor is intended to be used as the superclass of other classes that create iterators. It throws an error when constructed by itself.

The Intl.supportedValuesOf() static method returns an array containing the supported calendar, collation, currency, numbering systems, or unit values supported by the implementation.

The take() method of Iterator instances returns a new iterator helper that yields the given number of elements in this iterator and then terminates.

The drop() method of Iterator instances returns a new iterator helper that skips the given number of elements at the start of this iterator.

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The Promise.resolve() static method "resolves" a given value to a Promise. If the value is a promise, that promise is returned; if the value is a thenable, Promise.resolve() will call the then() method with two callbacks it prepared; otherwise the returned promise will be fulfilled with the value.

The RegExp[@@species] static accessor property returns the constructor used to construct copied regular expressions in certain RegExp methods.

The deref() method of WeakRef instances returns this WeakRef's target value, or undefined if the target value has been garbage-collected.

The RegExp.lastMatch static accessor property returns the last matched substring. RegExp["$&"] is an alias for this property.

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