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: weakmap

  3. javascript built-in: weakmap: clear

  4. javascript built-in: weakmap: delete

  5. javascript built-in: weakmap: get

  6. javascript built-in: weakmap: has

  7. javascript built-in: weakmap: set

  8. javascript built-in: weakmap: `weakmap()` constructor

  9. javascript built-in: weakmap: `weakmap()` constructor: `new weakmap(iterable)`

  10. javascript built-in: weakmap: `weakmap()` constructor: `weakmap()` without `new` throws

  11. javascript built-in: weakmap: `weakmap()` constructor: `new weakmap(null)`