1. Asynchronous Clipboard API

   A modern, asynchronous Clipboard API based on Promises

2. Async functions

   Async functions make it possible to treat functions returning Promise objects as if they were synchronous.

3. ECMAScript 2015 (ES6)

   Support for the ECMAScript 2015 specification. Features include Promises, Modules, Classes, Template Literals, Arrow Functions, Let and Const, Default Parameters, Generators, Destructuring Assignment, Rest & Spread, Map/Set & WeakMap/WeakSet and many more.

4. Promises

   A promise represents the eventual result of an asynchronous operation.