[1] Web Applications 1.0 r8744 Make RadioNodeList's radio button logic support the magical 'on' value. ( (2014-09-05 06:31:00 +09:00 版)) <http://html5.org/r/8744>

[2] Fix #703: Make form.imageName return non-descendant <img> · whatwg/html@40fa464 (2016-03-03 21:17:52 +09:00 版) <https://github.com/whatwg/html/commit/40fa4643dbf0ba004a938444fd4a370a1d3a53e2>

[3] Make forms work in shadow trees ( (annevk著, 2016-05-12 00:45:25 +09:00)) <https://github.com/whatwg/html/commit/927fda0f305452a9c54a25d3ebf9a6ed5ae29fd3>

[4] Use [Exposed=Window] even more (annevk著, 2017-09-06 17:34:18 +09:00) <https://github.com/whatwg/html/commit/f2a32c045aa7764533cda58b4452fe2bbc6652a0>