[1] Bug 39905 – Image Resizer API ( (2014-02-04 07:33:43 +09:00 版)) https://bugs.webkit.org/show_bug.cgi?id=39905

[2] Allow all HTML element constructors to be subclassed (domenic著, 2016-06-12 16:34:15 +09:00) https://github.com/whatwg/html/commit/4742b18559a6968213b680ea0b0521eae17de7e1