[1] Web Applications 1.0 r7681 Compatibility with deployed content. ( (2013-02-01 07:42:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=7680&to=7681

[2] IRC logs: freenode / #whatwg / 20150331 (2015-04-01 11:21:09 +09:00 版) http://krijnhoetmer.nl/irc-logs/whatwg/20150331#l-939

[3] Issue 472260 - chromium - onmouseenter and onmouseleave need [LenientThis] when they are defined on the prototype - An open-source project to help move the web forward. - Google Project Hosting (2015-04-01 11:21:48 +09:00 版) https://code.google.com/p/chromium/issues/detail?id=472260