* 仕様書

[REFS[
- [31] [CITE@en-GB-x-hixie[HTML Standard]] ([TIME[2015-05-06 10:42:35 +09:00]] 版) <https://html.spec.whatwg.org/#attr-iframe-sandbox>
]REFS]

* 歴史

[2] [CODE(HTMLa)@en[[[allowfullscreen]]]] [[属性]]の有無は、
[[parse a sandboxing directive]] 時の [DFN[[[allow fullscreen flag]]]]
(入力) として用いられます。

;; [1] 処理タイミングは [CODE(HTMLa)@en[[[sandbox]]]] を、
処理方法は [[parse a sandboxing directive]] を参照。

[3] [CITE@en[Make allowfullscreen and allowusermedia match implementations]]
([[annevk]]著, [TIME[2016-07-07 04:47:42 +09:00]])
<https://github.com/whatwg/html/commit/9f6b91cb14a0f497ee5b3e7118ee65e687eaea78>

[4] [CITE@en[Iframe sandboxing options for gUM · Issue #268 · w3c/mediacapture-main]]
([TIME[2016-07-10 15:18:41 +09:00]])
<https://github.com/w3c/mediacapture-main/issues/268>

[5] [CITE@en[Use HTML's new "allowed to use" algorithm]]
([[foolip]]著, [TIME[2016-08-12 18:41:17 +09:00]])
<https://github.com/whatwg/fullscreen/commit/42f9d159f948865ac415f0ac6243ee0e0a5d2c1a>

[6] [CITE@en[Integrate Feature Policy concepts into HTML]]
([[clelland]]著, [TIME[2018-06-23 05:22:11 +09:00]])
<https://github.com/whatwg/html/commit/78741b7b5471ba213c68a22caff1a53c56d35ce8>

[7] [CITE@en[Refer to feature policy spec (#107)]]
([[clelland]]著, [TIME[2018-07-11 23:18:29 +09:00]])
<https://github.com/whatwg/fullscreen/commit/97ff618681926e3333e9a78208a994371ba59b59>

[8] [CITE@en[Define fullscreen in terms of feature policy · Issue #106 · whatwg/fullscreen]]
([TIME[2018-07-13 16:01:14 +09:00]])
<https://github.com/whatwg/fullscreen/issues/106>

[9] [CITE@en[Refer to feature policy spec by clelland · Pull Request #107 · whatwg/fullscreen]]
([TIME[2018-07-13 16:02:59 +09:00]])
<https://github.com/whatwg/fullscreen/pull/107>