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 built-in: weakset

  3. javascript built-in: weakset: add

  4. javascript built-in: weakset: delete

  5. javascript built-in: weakset: has

  6. javascript built-in: weakset: non-registered symbols as keys

  7. javascript built-in: weakset: `weakset()` constructor

  8. javascript built-in: weakset: `weakset()` constructor: `new weakset(iterable)`

  9. javascript built-in: weakset: `weakset()` constructor: `new weakset(null)`