歴史

ES4

ES6

[1]

Chromium Blog: Chrome 42 Beta: Push Notifications, Promoting Add to Home Screen and ES6 Classes (2015-03-14 09:17:20 +09:00 版) http://blog.chromium.org/2015/03/chrome-42-beta-push-notifications_12.html

ES6 classes solve this by providing JavaScript a clean, standardized syntax for classes. This new syntax is available in Chrome 42 for JavaScript written in strict mode.

[2]

Safari 9.0 (2015-11-04 23:30:25 +09:00 版) https://developer.apple.com/library/safari/releasenotes/General/WhatsNewInSafari/Articles/Safari_9.html#//apple_ref/doc/uid/TP40014305-CH9-SW27

The following ECMAScript 6 content is now supported by Safari:
Classes

JSIDL

[5]

JSIDL、Elements も参照。

[169] Bug 23225 – Let's start using class, not interface ( (2013-09-13 07:44:57 +09:00 版)) https://www.w3.org/Bugs/Public/show_bug.cgi?id=23225

[4] class Elements extends Array ( (2013-09-16 12:01:46 +09:00 版)) https://gist.github.com/domenic/5864658

[3] Comment out query/queryAll/Elements for now · whatwg/dom@10b6cf1 (2016-03-30 11:16:27 +09:00 版) https://github.com/whatwg/dom/commit/10b6cf1ba02806220d5461a3bdb7939728b73635

[6] 23225 – Let's start using class, not interface (2017-12-08 15:51:21 +09:00) https://www.w3.org/Bugs/Public/show_bug.cgi?id=23225

[7] Consider syntactic changes to WebIDL to make it more "JavaScript-y" · Issue #485 · heycam/webidl (2017-12-08 15:51:59 +09:00) https://github.com/heycam/webidl/issues/485