The finally() method of Promise instances schedules a function to be called when the promise is settled (either fulfilled or rejected). It immediately returns an equivalent Promise object, allowing you to chain calls to other promise methods.

The Symbol.split static data property represents the well-known symbol @@split. The String.prototype.split() method looks up this symbol on its first argument for the method that splits a string at the indices that match the current object.

The Symbol.keyFor() static method retrieves a shared symbol key from the global symbol registry for the given symbol.

The Symbol() function returns primitive values of type Symbol.

The Uint32Array() constructor creates Uint32Array objects. The contents are initialized to 0.

The script accessor property of Intl.Locale instances returns the script used for writing the particular language used in this locale.

The of() method of Intl.DisplayNames instances receives a code and returns a string based on the locale and options provided when instantiating this Intl.DisplayNames object.

The Intl.Segmenter.supportedLocalesOf() static method returns an array containing those of the provided locales that are supported in segmentation without having to fall back to the runtime's default locale.

The Intl.Segmenter() constructor creates Intl.Segmenter objects.

The formatToParts() method of Intl.RelativeTimeFormat instances returns an Array of objects representing the relative time format in parts that can be used for custom locale-aware formatting.