<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="1" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[1]</anchor-end> <code class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">iframe</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>などによって他の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>の内部に<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子</anchor>に生成される<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>を、
<dfn><rubyb xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ruby xmlns="http://www.w3.org/1999/xhtml">入<rt>い</rt></ruby>れ<ruby xmlns="http://www.w3.org/1999/xhtml">子<rt>こ</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">閲<rt>えつ</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">覧<rt>らん</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">文<rt>ぶん</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">脈<rt>みゃく</rt></ruby><rt xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">nested browsing context</rt></rubyb></dfn>といいます。</p><comment-p xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="11" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[11]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">最上位閲覧文脈</anchor>に対する<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">窓</anchor>のように、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>は<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">フレーム</anchor>に相当するものです。</comment-p><section><h1>仕様書</h1><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="2" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[2]</anchor-end> <cite xml:lang="en-US-x-hixie">HTML Standard</cite> (<time>2014-01-18 00:46:11 +09:00</time> 版) <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://www.whatwg.org/specs/web-apps/current-work/#nested-browsing-context">http://www.whatwg.org/specs/web-apps/current-work/#nested-browsing-context</anchor-external></li></ul></refs></section><section><h1>状態</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="10" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[10]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>が持つ状態については、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>を参照。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="13" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[13]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈包含子</anchor>は、
<dfn><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><rubyb><ruby xmlns="http://www.w3.org/1999/xhtml">入<rt>い</rt></ruby>れ<ruby xmlns="http://www.w3.org/1999/xhtml">子<rt>こ</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">閲<rt>えつ</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">覧<rt>らん</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">文<rt>ぶん</rt></ruby><ruby xmlns="http://www.w3.org/1999/xhtml">脈<rt>みゃく</rt></ruby><rt xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">nested browsing context</rt></rubyb><title xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:">nested browsing context</title></f></dfn>を持ちます。
値は<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>または <code>null</code> です。
初期値は <code>null</code> です。 <src xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="2" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;2</anchor-internal></src></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="83" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[83]</anchor-end> 
逆に<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>の<f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">包含子</f>は、その<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>が<f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</f>である<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈包含子</anchor>となります。</p></section><section><h1>文脈</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="3" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[3]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>は次の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>によって作られます。</p><figure class="list"><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="4" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[4]</anchor-end> <code class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">iframe</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="5" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[5]</anchor-end> <code class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">frame</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="6" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[6]</anchor-end> <code class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">object</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor> (<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML</anchor>、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">SVG</anchor> などの場合)</li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="7" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[7]</anchor-end> <code class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">embed</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor> (<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">SVG</anchor> の場合)</li></ul></figure><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="8" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[8]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">XUL</anchor> の <code class="XMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">iframe</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>も<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>を作るとみられます。
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">XUL</anchor> の <code class="XMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">browser</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>はおそらく<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">最上位閲覧文脈</anchor>を作るもので、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>ではないでしょう。</p><comment-p xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="9" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[9]</anchor-end> <code xmlns="http://www.w3.org/1999/xhtml" class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">img</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>や <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">SVG</anchor> <code xmlns="http://www.w3.org/1999/xhtml" class="XMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">image</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>や <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">CSS</anchor>
によって埋め込まれた <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">SVG</anchor> 画像は<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>を作りません。</comment-p></section><section><h1>関連</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="22" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[22]</anchor-end> 
<f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</f>は、それが属する<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素</anchor>の属する<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">閲覧文脈</anchor>から見れば<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">子供閲覧文脈</anchor>です。
かつては仕様上も<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">入れ子閲覧文脈</anchor>と<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">子供閲覧文脈</anchor>の用語が混用されていました
<src xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="21" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;21</anchor-internal></src>。</p></section><section><h1>歴史</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="12" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[12]</anchor-end> <cite xml:lang="en">Be more precise about nested and discarded browsing contexts</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">domenic</anchor>著, <time>2016-07-20 22:58:49 +09:00</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/39118df640ad4a3f03f164fb5ffe0a56316297be">https://github.com/whatwg/html/commit/39118df640ad4a3f03f164fb5ffe0a56316297be</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="14" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[14]</anchor-end> <cite xml:lang="en">Editorial: use &quot;nested browsing context&quot; more consistently</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">domenic</anchor>著, <time>2016-08-03 11:12:22 +09:00</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/ed6b84933a9a8c4753451e58724fab49f0680b22">https://github.com/whatwg/html/commit/ed6b84933a9a8c4753451e58724fab49f0680b22</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="15" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[15]</anchor-end> <cite xml:lang="en">Only apply &quot;being rendered&quot; to elements</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">domenic</anchor>著, <time>2016-10-05 03:59:01 +09:00</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/4bf7b83405a903590196c70de8e6b2ec9f904f3d">https://github.com/whatwg/html/commit/4bf7b83405a903590196c70de8e6b2ec9f904f3d</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="16" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[16]</anchor-end> <cite xml:lang="en">27480 – &lt;object&gt; Consider not unloading/loading SVG when flipping rendering.</cite>
(<time>2017-07-24 15:21:49 +09:00</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://www.w3.org/Bugs/Public/show_bug.cgi?id=27480">https://www.w3.org/Bugs/Public/show_bug.cgi?id=27480</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="17" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[17]</anchor-end> <cite xml:lang="en">Editorial: reference the type instead of the member name</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">annevk</anchor>著, <time>2019-03-12 02:11:45 +09:00</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/dafd8b1aded451c988d4888423c9a481895defa1">https://github.com/whatwg/html/commit/dafd8b1aded451c988d4888423c9a481895defa1</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="18" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[18]</anchor-end> <cite xml:lang="en">Use Window's associated Document to define Window's named getter by annevk · Pull Request #4404 · whatwg/html</cite>
(<time>2019-07-22 10:50:57 +09:00</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/pull/4404">https://github.com/whatwg/html/pull/4404</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="19" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[19]</anchor-end> <cite xml:lang="en">Give browsing context an explicit container</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">annevk</anchor>, <time>2019-11-22 17:11:31 +09:00</time>, <time>2022-01-13T08:59:14.000Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/7b4964ad0a953b05738afc66600fa47a4dc8045d">https://github.com/whatwg/html/commit/7b4964ad0a953b05738afc66600fa47a4dc8045d</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="20" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[20]</anchor-end> <cite xml:lang="en">Give browsing contexts an explicit container by annevk · Pull Request #5091 · whatwg/html</cite>
(<time>2022-01-13T10:29:36.000Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/pull/5091">https://github.com/whatwg/html/pull/5091</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="21" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[21]</anchor-end> <cite xml:lang="en">Editorial: nested browsing context is a member, not a type</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">annevk</anchor>, <time>2019-11-27 02:46:03 +09:00</time>, <time>2022-01-18T09:12:20.000Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/6b737bbc428facf34ec3728c0912cf9e172d0ea4">https://github.com/whatwg/html/commit/6b737bbc428facf34ec3728c0912cf9e172d0ea4</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="23" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[23]</anchor-end> <cite xml:lang="en">Editorial: nested browsing context is a member, not a type by annevk · Pull Request #5095 · whatwg/html</cite>
(<time>2022-01-18T10:09:18.000Z</time>)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/pull/5095">https://github.com/whatwg/html/pull/5095</anchor-external></p></section></body></html>