Locale-specific date and time formatting, number formatting, and comparisons are provided through the Internationalization API, which conforms to the ECMAScript Internationalization API Specification. For details, see Intl.DateTimeFormat Object , Intl.NumberFormat Object , and Intl.Collator Object.
You can use the __proto__ property to set the prototype for user-defined objects, intrinsic objects, and functions. To learn more, see __proto__ Property (Object).
A new typed array, Uint8ClampedArray, provides support for typed arrays consisting of 8-bit unsigned integers with values clamped to the range 0-255. In addition, the ArrayBuffer object now supports the slice method and ArrayBuffer.isView function.