* 仕様書

[REFS[
- [1] [CITE[ECMAScript® 2017 Language Specification]]
([TIME[2016-03-26 04:47:30 +09:00]] 版)
<https://tc39.github.io/ecma262/#sec-initializehostdefinedrealm>
]REFS]

* 文脈

[3] [[Web]] では、次の場面で呼び出されます。
[FIG(list)[
- [4] [CODE(DOMi)@en[Window]]
-- [6] [[新しい閲覧文脈の作成]]
-- [7] [[新しい[CODE(DOMi)@en[Document]]オブジェクトの初期化]] ([[navigate]])
-- [8] [CODE(JS)@en[document.open]]
- [5] [CODE(DOMi)@en[WorkerGlobalScope]]
-- [9] [[ワーカーを走らせる]]
]FIG]

* 歴史

[REFS[
- [2] [CITE@en[Fix navigation to create a new realm and environment settings object · whatwg/html@862afa4]] ([TIME[2016-03-28 21:22:04 +09:00]] 版) <https://github.com/whatwg/html/commit/862afa4d768cb01e9a020e0562bc465e7f8bacfe>
]REFS]

[10] [CITE@en[Editorial: clean up InitializeHostDefinedRealm invocations]]
([[domenic]]著, [TIME[2016-07-18 21:38:07 +09:00]])
<https://github.com/whatwg/html/commit/8e18308e345cf0f0a0b5ee75153c5513355ae710>