1. 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.

2. JavaScript modules via script tag

   Loading JavaScript module scripts (aka ES6 modules) using `<script type="module">` Includes support for the `nomodule` attribute.

3. JavaScript modules: dynamic import()

   Loading JavaScript modules dynamically using the import() syntax