[1] [CITE@en[Web Applications 1.0 r7941     Example window.opener cross-origin.]]
( ([TIME[2013-06-08 07:55:00 +09:00]] 版))
<http://html5.org/tools/web-apps-tracker?from=7940&to=7941>

[2] [CITE@en[Bug 21946 – Ignoring non-null values of opener does not seem to be web-compatible]]
( ([TIME[2013-06-09 22:22:16 +09:00]] 版))
<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21946>

[3] [CITE@en[Web Applications 1.0 r8235     Try to make window.opener more compatible]]
( ([TIME[2013-10-23 03:15:00 +09:00]] 版))
<http://html5.org/tools/web-apps-tracker?from=8234&to=8235>

[4] [CITE[''''''[''''''whatwg'''''']'''''' Effect on window.opener when navigating an existing window using window.open]]
( ([TIME[2014-04-02 20:17:18 +09:00]] 版))
<http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2014-April/126955.html>