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.

TLS 1.3

Version 1.3 (the latest one) of the Transport Layer Security (TLS) protocol. Removes weaker elliptic curves and hash functions.

css property: container-type: applies style and size containment, but no layout containment.

javascript built-in: weakmap

javascript built-in: weakmap: delete

javascript built-in: weakmap: get

javascript built-in: weakmap: getorinsert

javascript built-in: weakmap: getorinsertcomputed

javascript built-in: weakmap: has

javascript built-in: weakmap: set

javascript built-in: weakmap: non-registered symbols as keys

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

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

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

javascript built-in: weakref

javascript built-in: weakref: deref

javascript built-in: weakref: `weakref()` constructor

javascript built-in: weakref: `weakref()` constructor: non-registered symbol as target

javascript built-in: weakset

javascript built-in: weakset: add

javascript built-in: weakset: delete

javascript built-in: weakset: has

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

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

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

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