[1] [CITE@en[Bug 25897 – focusin and focusout should be included in the "focus update steps"]]
( ([TIME[2014-05-29 04:59:12 +09:00]] 版))
<https://www.w3.org/Bugs/Public/show_bug.cgi?id=25897>

[2] [CITE[IRC logs: freenode / #whatwg / 20140528]]
( ([TIME[2014-05-29 20:54:25 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20140528#l-763>

[3] [CITE@en[Don't repeat events defined in other specs. · w3c/svgwg@ba6ff23]]
([TIME[2016-02-06 12:34:05 +09:00]] 版)
<https://github.com/w3c/svgwg/commit/ba6ff23e1e90914465633294eebc091f6065e0d6>

[4] [CITE@en[Don't repeat events defined in other specs. · w3c/svgwg@ba6ff23]]
([TIME[2016-02-06 12:34:11 +09:00]] 版)
<https://github.com/w3c/svgwg/commit/ba6ff23e1e90914465633294eebc091f6065e0d6>

[5] [CITE@en[Figure out what to do with focusin/focusout · Issue #88 · w3c/uievents]]
([TIME[2018-02-28 18:17:42 +09:00]])
<https://github.com/w3c/uievents/issues/88>

[6] [CITE@en[25897 – focusin and focusout should be included in the "focus update steps"]]
([TIME[2018-02-28 18:23:02 +09:00]])
<https://www.w3.org/Bugs/Public/show_bug.cgi?id=25897>

[7] [CITE@en[Shim focusin/focusout in all browsers? · Issue #3123 · jquery/jquery]]
([TIME[2018-02-28 18:23:34 +09:00]])
<https://github.com/jquery/jquery/issues/3123>