<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body><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="18" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[18]</anchor-end> <cite xml:lang="en-GB-x-hixie">HTML Standard</cite> (<time>2014-06-20 15:40:17 +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/#the-picture-element">http://www.whatwg.org/specs/web-apps/current-work/#the-picture-element</anchor-external></li></ul></refs></section><section><h1>歴史</h1><section><h1>前史</h1><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="52" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[52]</anchor-end> <code>&lt;!--webbot--&gt;</code><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="51" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[51]</anchor-end> 
<cite xml:lang="en-us">FP2002: Photo Gallery May Not Show All Images</cite>, <time>2024-09-07T02:12:13.000Z</time>, <time>2007-08-08T01:49:03.073Z</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://web.archive.org/web/20070808014621/http://support.microsoft.com/kb/813736">https://web.archive.org/web/20070808014621/http://support.microsoft.com/kb/813736</anchor-external></li></ul></li></ul><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>
<cite>Pages using &lt;picture&gt; (sorted by MD5 of URL)</cite> (<code>2007-12-27 01:29:06 +09:00</code> 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://canvex.lazyilluminati.com/survey/2007-07-17/analyse.cgi/pages/tag/picture">http://canvex.lazyilluminati.com/survey/2007-07-17/analyse.cgi/pages/tag/picture</anchor-external></p><ul><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>HTML5 IRC logs: freenode / #whatwg / 20071225</cite> (<time>2007-12-27 01:31:25 +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://krijnhoetmer.nl/irc-logs/whatwg/20071225#l-150">http://krijnhoetmer.nl/irc-logs/whatwg/20071225#l-150</anchor-external></li></ul><figure class="data"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="55" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[55]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML要素概説</anchor></figcaption><dl><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>picture</code></dd><dt>日付</dt><dd><time>2007-12-25</time></dd><dt>説明</dt><dd>
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">FrontPage Server Extensions</anchor>
が写真アルバム機能のため
<code>picture</code>
を使っていた。
<time>2007</time>時点でも用例が若干残っていた。
現在の <code>picture</code> と互換性はない。</dd><dt>出典</dt><dd><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li>
<cite>IRC logs: freenode / #whatwg / 20071225</cite>, 
<time itemprop="published">2007-12-25</time>,
<time>2024-09-07T03:25:34.000Z</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://krijnhoetmer.nl/irc-logs/whatwg/20071225">https://krijnhoetmer.nl/irc-logs/whatwg/20071225</anchor-external></li></ul></refs></dd></dl></figure><hr></hr><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="43" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[43]</anchor-end> 
<cite>Terra Informatica Software, Inc.</cite>, <time>2024-08-17T09:37:55.000Z</time>, <time>2011-01-01T08:17:50.894Z</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://web.archive.org/web/20110101081723/http://www.terrainformatica.com/htmlayout/logfile.whtm">https://web.archive.org/web/20110101081723/http://www.terrainformatica.com/htmlayout/logfile.whtm</anchor-external></p><figure class="data"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="44" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[44]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML要素概説</anchor></figcaption><dl><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>picture</code></dd><dt>日付</dt><dd><time>2008-11-09</time></dd><dt>説明</dt><dd>
<time>2008-11-09</time>、
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HtmLayout</anchor>
は
<code>picture</code>
を実装した。
<code>img</code>
と同等だが<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">ブロック水準要素</anchor>として機能する。
現在の <code>picture</code> と互換性はない。</dd><dt>出典</dt><dd><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li>
<cite>Terra Informatica Software, Inc.</cite>, 
<data itemprop="author"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Terra Informatica Software Design</anchor></data>,
<time itemprop="published">2010-12-05</time>,
<time>2024-08-17T09:37:55.000Z</time>, <time>2011-01-01T08:17:50.894Z</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://web.archive.org/web/20110101081723/http://www.terrainformatica.com/htmlayout/logfile.whtm">https://web.archive.org/web/20110101081723/http://www.terrainformatica.com/htmlayout/logfile.whtm</anchor-external></li></ul></refs></dd></dl></figure></section><section><h1><code class="HTMLa" xml:lang="en">srcset</code> 属性</h1><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="17" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[17]</anchor-end> <code xmlns="http://www.w3.org/1999/xhtml" class="HTMLa" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">srcset</anchor></code> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">属性</anchor>の項を参照してください。</comment-p></section><section><h1>RICG</h1><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="56" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[56]</anchor-end> <cite xml:lang="en">all in.</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">scottjehl</anchor>, <time>2012-02-21 17:44:16 +09:00</time>, <time>2024-09-07T03:42:12.000Z</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/ResponsiveImagesCG/picture-element/commit/77defd7f9cfe645143a38b3b57b425a0c7b1f020">https://github.com/ResponsiveImagesCG/picture-element/commit/77defd7f9cfe645143a38b3b57b425a0c7b1f020</anchor-external></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="58" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[58]</anchor-end> <cite xml:lang="en">Commits · ResponsiveImagesCG/picture-element · GitHub</cite>, <time>2024-09-07T03:45:58.000Z</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/ResponsiveImagesCG/picture-element/commits/gh-pages/?after=7c7402c1c219dd12a63437a4cbf4bf76c0d9b67a+2239">https://github.com/ResponsiveImagesCG/picture-element/commits/gh-pages/?after=7c7402c1c219dd12a63437a4cbf4bf76c0d9b67a+2239</anchor-external></li></ul><figure class="data"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="57" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[57]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML要素概説</anchor></figcaption><dl><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>picture</code></dd><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>source</code></dd><dt>日付</dt><dd><time>2012-02-21</time></dd><dt>説明</dt><dd>
<time>2012-02-21</time>、
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Scott Jehl</anchor>
は、
<code>picture</code>,
<code>source</code> (<code>picture</code> 用)
の
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">polyfill</anchor>
を公開した。
後に <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">W3C HTML WG</anchor> の仕様案として採択された。
類似の提案はこのしばらく前まで遡る。</dd><dt>出典</dt><dd><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li>
<dfn>RICG:AllIn</dfn>:
<cite xml:lang="en">all in.</cite>, 
<data itemprop="author"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">scottjehl</anchor></data>, 
<time itemprop="published">2012-02-21 17:44:16 +09:00</time>, <time>2024-09-07T03:42:12.000Z</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/ResponsiveImagesCG/picture-element/commit/77defd7f9cfe645143a38b3b57b425a0c7b1f020">https://github.com/ResponsiveImagesCG/picture-element/commit/77defd7f9cfe645143a38b3b57b425a0c7b1f020</anchor-external></li></ul></refs></dd></dl></figure><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-US">Responsive Images Community Group</cite>
( (<time>2012-05-11 00:38:40 +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.w3.org/community/respimg/">http://www.w3.org/community/respimg/</anchor-external></p><p><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> <cite>The picture element</cite>
( (<time>2013-02-25 18:22:25 +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://picture.responsiveimages.org/">http://picture.responsiveimages.org/</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>Use Cases and Requirements for Standardizing Responsive Images</cite>
( (<time>2013-02-26 19:38:11 +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.w3.org/TR/2013/WD-respimg-usecases-20130226/">http://www.w3.org/TR/2013/WD-respimg-usecases-20130226/</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>IRC logs: freenode / #whatwg / 20130921</cite>
( (<time>2013-09-24 09:00:22 +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://krijnhoetmer.nl/irc-logs/whatwg/20130921">http://krijnhoetmer.nl/irc-logs/whatwg/20130921</anchor-external></p><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> <cite>IRC logs: freenode / #whatwg / 20130930</cite>
( (<time>2013-10-03 20:18:29 +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://krijnhoetmer.nl/irc-logs/whatwg/20130930">http://krijnhoetmer.nl/irc-logs/whatwg/20130930</anchor-external></p><p><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> <cite xml:lang="en">Use Cases and Requirements for Standardizing Responsive Images</cite>
( (<time>2013-11-06 19:34:20 +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.w3.org/TR/2013/NOTE-respimg-usecases-20131107/">http://www.w3.org/TR/2013/NOTE-respimg-usecases-20131107/</anchor-external></p><p><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> <cite>Simplified Picture Element</cite>
( (<time>2013-11-24 09:28:21 +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://geekhood.net/picture-element.html">http://geekhood.net/picture-element.html</anchor-external></p><p><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> <cite>The picture element</cite>
( (<time>2013-02-26 01:52:04 +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.w3.org/TR/2013/WD-html-picture-element-20130226/">http://www.w3.org/TR/2013/WD-html-picture-element-20130226/</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">ResponsiveImages.org</cite> (<time>2014-07-01 05:02:45 +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://responsiveimages.org/">http://responsiveimages.org/</anchor-external></p></section><section><h1>HTML Standard への統合</h1><ul><li><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> <cite xml:lang="en">Web Applications 1.0 r8561 Internal annotations for future img stuff</cite>
( (<time>2014-04-03 04:17:00 +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://html5.org/tools/web-apps-tracker?from=8560&amp;to=8561">http://html5.org/tools/web-apps-tracker?from=8560&amp;to=8561</anchor-external><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="53" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[53]</anchor-end> 
<cite xml:lang="en"><strong>[</strong>e<strong>]</strong> (0) Internal annotations for future img stuff</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor>, <time>2014-04-03 04:17:52 +09:00</time>, <time>2024-09-07T02:34:33.000Z</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/fd376b16b61bd1e6a82463f15c034a8ebac22a53">https://github.com/whatwg/html/commit/fd376b16b61bd1e6a82463f15c034a8ebac22a53</anchor-external></li></ul></li></ul><p><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> <cite>IRC logs: freenode / #whatwg / 20140402</cite>
( (<time>2014-04-03 13:58:15 +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://krijnhoetmer.nl/irc-logs/whatwg/20140402#l-136">http://krijnhoetmer.nl/irc-logs/whatwg/20140402#l-136</anchor-external></p><figure class="data"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="216" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[216]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML要素概説</anchor></figcaption><dl><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>picture</code></dd><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>imgcandidate</code></dd><dt>日付</dt><dd><time>2014-04-02</time></dd><dt>説明</dt><dd>
<time>2014-04-02</time>、
<cite>HTML Standard</cite>
の文書ソース注釈に
<code>picture</code>,
<code>imgcandidate</code>
の構想が追加された。
現在の
<code>picture</code>,
<code>source</code> (<code>picture</code> 用)
に当たる。</dd><dt>出典</dt><dd><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li>
<cite>HTML r8561</cite>,
<data itemprop="author"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor></data>, 
<time itemprop="published">2014-04-03 04:17:52 +09:00</time>, <time>2024-09-07T02:34:33.000Z</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/fd376b16b61bd1e6a82463f15c034a8ebac22a53">https://github.com/whatwg/html/commit/fd376b16b61bd1e6a82463f15c034a8ebac22a53</anchor-external></li></ul></refs></dd></dl></figure><ul><li><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> <cite xml:lang="en">Web Applications 1.0 r8612 Remove the &lt;img&gt; stuff so that zcorpan can edit it instead. (this is purely editorial)</cite>
( (<time>2014-05-08 06:40:00 +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://html5.org/tools/web-apps-tracker?from=8611&amp;to=8612">http://html5.org/tools/web-apps-tracker?from=8611&amp;to=8612</anchor-external><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="48" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[48]</anchor-end> 
<cite xml:lang="en"><strong>[</strong>e<strong>]</strong> (0) Remove the &lt;img&gt; stuff so that zcorpan can edit it instead. (…</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor>, <time>2014-05-08 06:40:45 +09:00</time>, <time>2024-09-07T02:03:12.000Z</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/61b568a581ffa526d0061444b7d1ae258719a66c">https://github.com/whatwg/html/commit/61b568a581ffa526d0061444b7d1ae258719a66c</anchor-external></li></ul></li></ul><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="50" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[50]</anchor-end> <cite xml:lang="en">picture-element/source at gh-pages · ResponsiveImagesCG/picture-element · GitHub</cite>, <time>2024-09-07T02:06:00.000Z</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/ResponsiveImagesCG/picture-element/blob/gh-pages/source">https://github.com/ResponsiveImagesCG/picture-element/blob/gh-pages/source</anchor-external></li></ul><ul><li><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> <cite><strong></strong>[<strong></strong>e<strong></strong>]<strong></strong> (0) Merge upstream changes for &lt;img&gt; · 08e2efd · whatwg/html-mirror</cite>
( (<time>2014-05-15 07:09:26 +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="https://github.com/whatwg/html-mirror/commit/08e2efd661728b8b2563cd5f144a89e3b6c5409f">https://github.com/whatwg/html-mirror/commit/08e2efd661728b8b2563cd5f144a89e3b6c5409f</anchor-external></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="49" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[49]</anchor-end> <cite xml:lang="en"><strong>[</strong>e<strong>]</strong> (0) Merge upstream changes for &lt;img&gt;</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor>, <time>2014-05-10 02:45:11 +09:00</time>, <time>2024-09-07T02:05:15.000Z</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/08e2efd661728b8b2563cd5f144a89e3b6c5409f">https://github.com/whatwg/html/commit/08e2efd661728b8b2563cd5f144a89e3b6c5409f</anchor-external></li></ul><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="45" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[45]</anchor-end> 
<cite xml:lang="en"><strong>[</strong><strong>]</strong> (0) integrate upstream &lt;picture&gt; updates</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor>, <time>2014-06-18 02:41:49 +09:00</time>, <time>2024-09-07T02:00:39.000Z</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/a7716b7a2463323c7f25176f4b3768008d170204">https://github.com/whatwg/html/commit/a7716b7a2463323c7f25176f4b3768008d170204</anchor-external></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="46" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[46]</anchor-end> 
<cite xml:lang="en"><strong>[</strong><strong>]</strong> (0) integrate upstream &lt;picture&gt; updates</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor>, <time>2014-06-18 02:51:10 +09:00</time>, <time>2024-09-07T02:01:41.000Z</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/62c031f20109c6b6dd57b553ee860bddb1eb7b45">https://github.com/whatwg/html/commit/62c031f20109c6b6dd57b553ee860bddb1eb7b45</anchor-external></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="47" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[47]</anchor-end> 
<cite xml:lang="en"><strong>[</strong><strong>]</strong> (0) &lt;picture&gt; integration and moving to html5lib</cite>, <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor>, <time>2014-06-21 00:39:43 +09:00</time>, <time>2024-09-07T02:01:57.000Z</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/62c9b4de8b583b6d005049daa4aa0dbe6384c087">https://github.com/whatwg/html/commit/62c9b4de8b583b6d005049daa4aa0dbe6384c087</anchor-external></li></ul><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"><strong></strong>[<strong></strong>whatwg<strong></strong>]<strong></strong> &lt;picture&gt; added to HTML</cite>
( (<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Simon Pieters</anchor> 著, <time>2014-06-19 21:08:31 +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://lists.w3.org/Archives/Public/public-whatwg-archive/2014Jun/0061.html">http://lists.w3.org/Archives/Public/public-whatwg-archive/2014Jun/0061.html</anchor-external></p><figure class="data"><figcaption><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="54" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[54]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML要素概説</anchor></figcaption><dl><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>picture</code></dd><dt><f xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">要素名</f></dt><dd><code>source</code></dd><dt>日付</dt><dd><time>2014-06-17</time></dd><dt>説明</dt><dd>
<time>2014-06-17</time>、
<cite>HTML Standard</cite>
に
<code>picture</code>,
<code>source</code> (<code>picture</code> 用)
が追加された。
現行仕様である。</dd><dt>出典</dt><dd><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li>
<cite>HTML r8680</cite>,
<data itemprop="author"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Hixie</anchor></data>, 
<time itemprop="published">2014-06-18 02:41:49 +09:00</time>, <time>2024-09-07T02:00:39.000Z</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/a7716b7a2463323c7f25176f4b3768008d170204">https://github.com/whatwg/html/commit/a7716b7a2463323c7f25176f4b3768008d170204</anchor-external></li></ul></refs></dd></dl></figure><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> <cite>History for source - ResponsiveImagesCG/picture-element</cite>
( (<time>2014-07-01 05:01:06 +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="https://github.com/ResponsiveImagesCG/picture-element/commits/gh-pages/source">https://github.com/ResponsiveImagesCG/picture-element/commits/gh-pages/source</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>Move the normative bits of the picture spec to the HTML spec. · 60e9bbd · ResponsiveImagesCG/picture-element</cite>
( (<time>2014-07-01 07:07:53 +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="https://github.com/ResponsiveImagesCG/picture-element/commit/60e9bbd1514d7c51dabab5fb750881e9f3e6a478">https://github.com/ResponsiveImagesCG/picture-element/commit/60e9bbd1514d7c51dabab5fb750881e9f3e6a478</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>&lt;picture&gt; doesn't need to be palpable content since it contains an &lt;img&gt; · c8b726a · ResponsiveImagesCG/picture-element</cite>
( (<time>2014-07-01 07:08:10 +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="https://github.com/ResponsiveImagesCG/picture-element/commit/c8b726afabaa0d139edac7ca657a78d212484581">https://github.com/ResponsiveImagesCG/picture-element/commit/c8b726afabaa0d139edac7ca657a78d212484581</anchor-external></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="22" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[22]</anchor-end> <code xmlns="http://www.w3.org/1999/xhtml" class="HTMLa" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">srcset</anchor></code> と <code xmlns="http://www.w3.org/1999/xhtml" class="HTMLe" xml:lang="en"><anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">source</anchor></code>
も参照。</comment-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">Remove obsolete files · 4a49661 · ResponsiveImagesCG/picture-element</cite>
(<time>2015-03-03 16:18:48 +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="https://github.com/ResponsiveImagesCG/picture-element/commit/4a4966184b0b0de9a8897b5cd499f63eb8cea4df">https://github.com/ResponsiveImagesCG/picture-element/commit/4a4966184b0b0de9a8897b5cd499f63eb8cea4df</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="24" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[24]</anchor-end> <cite xml:lang="en">&lt;picture&gt; in SVG</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Tab Atkins Jr.</anchor> 著, <time>2015-03-26 05:28:14 +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="https://lists.w3.org/Archives/Public/www-svg/2015Mar/0115.html">https://lists.w3.org/Archives/Public/www-svg/2015Mar/0115.html</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="25" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[25]</anchor-end> <cite xml:lang="en">Include &lt;picture&gt; directly rather than through a build script · whatwg/html@d9cff6e</cite>
(<time>2015-09-02 16:42:41 +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="https://github.com/whatwg/html/commit/d9cff6e9a6fb2928ef5d3f3d8df4e4dd18fb9b4c">https://github.com/whatwg/html/commit/d9cff6e9a6fb2928ef5d3f3d8df4e4dd18fb9b4c</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="26" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[26]</anchor-end> <cite xml:lang="en">Moved to whatwg/html · ResponsiveImagesCG/picture-element@972412b</cite>
(<time>2015-09-02 16:46:58 +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="https://github.com/ResponsiveImagesCG/picture-element/commit/972412b4aff6cb687d36fd165a7e0b8f5057562c">https://github.com/ResponsiveImagesCG/picture-element/commit/972412b4aff6cb687d36fd165a7e0b8f5057562c</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="27" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[27]</anchor-end> <cite xml:lang="en">Merge &lt;picture&gt; dependencies · whatwg/html@68b277d</cite>
(<time>2015-09-03 14:38:44 +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="https://github.com/whatwg/html/commit/68b277d05dd6ac66321821de038e91fc90afc5fd">https://github.com/whatwg/html/commit/68b277d05dd6ac66321821de038e91fc90afc5fd</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="28" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[28]</anchor-end> <cite xml:lang="en">Fix #414: Factor out &quot;use srcset or picture&quot; to avoid grammatical amb… · whatwg/html@5fa33f0</cite>
(<time>2015-12-18 18:35:34 +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="https://github.com/whatwg/html/commit/5fa33f072011f29ed56adb0f2f63bb4404c92aae">https://github.com/whatwg/html/commit/5fa33f072011f29ed56adb0f2f63bb4404c92aae</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="29" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[29]</anchor-end> <cite xml:lang="en">Fix #478: Set currentSrc to input if resolve fails · whatwg/html@5e6f6ae</cite>
(<time>2016-01-12 11:30:04 +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="https://github.com/whatwg/html/commit/5e6f6aeaaf5c2a1ca77207cd3954370a83a1f2f0">https://github.com/whatwg/html/commit/5e6f6aeaaf5c2a1ca77207cd3954370a83a1f2f0</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="30" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[30]</anchor-end> <cite xml:lang="en">Change step 11 of 'Update the image data' into substeps · whatwg/html@16eb8bb</cite>
(<time>2016-01-12 11:30:18 +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="https://github.com/whatwg/html/commit/16eb8bb254dde2d0ab5617c410d46a87485065c8">https://github.com/whatwg/html/commit/16eb8bb254dde2d0ab5617c410d46a87485065c8</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="31" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[31]</anchor-end> <cite xml:lang="en">Add images to embedded content introduction's examples · whatwg/html@14111f6</cite>
(<time>2016-01-13 12:08:01 +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="https://github.com/whatwg/html/commit/14111f62f041fec58a8a622ea042273e12b5f271">https://github.com/whatwg/html/commit/14111f62f041fec58a8a622ea042273e12b5f271</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="32" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[32]</anchor-end> <cite xml:lang="en">Fix #471: Change step 5.3 of 'Update the image data' into substeps · whatwg/html@ea2341f</cite>
(<time>2016-01-13 12:13:20 +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="https://github.com/whatwg/html/commit/ea2341f721972d87876d26aa6c48de331d085ed3">https://github.com/whatwg/html/commit/ea2341f721972d87876d26aa6c48de331d085ed3</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="33" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[33]</anchor-end> <cite xml:lang="en">Add acks and commit history for &lt;picture&gt; · whatwg/html@944e07d</cite>
(<time>2016-01-20 17:28:04 +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="https://github.com/whatwg/html/commit/944e07d6b5ca6fe3c9785d7309248d9ec1cf76c3">https://github.com/whatwg/html/commit/944e07d6b5ca6fe3c9785d7309248d9ec1cf76c3</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="34" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[34]</anchor-end> <cite xml:lang="en">Add sizes=&quot;&quot; et al to the Index section · whatwg/html@dfe18ac</cite>
(<time>2016-01-20 17:28:47 +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="https://github.com/whatwg/html/commit/dfe18acf2b4834be5b63cf6bebb97245a1b2a910">https://github.com/whatwg/html/commit/dfe18acf2b4834be5b63cf6bebb97245a1b2a910</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="35" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[35]</anchor-end> <cite xml:lang="en">Merge source element definitions · whatwg/html@d8f4b79</cite>
(<time>2016-04-26 20:47:31 +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="https://github.com/whatwg/html/commit/d8f4b792dcaa6e205a7af2c074ee59cd838717d7">https://github.com/whatwg/html/commit/d8f4b792dcaa6e205a7af2c074ee59cd838717d7</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="36" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[36]</anchor-end> <cite xml:lang="en">Editorial: restructure the &lt;img&gt;-related sections</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">zcorpan</anchor>著, <time>2016-09-09 17:04:29 +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/819272910bb1355bb3c45dc4976d71c1152eb723">https://github.com/whatwg/html/commit/819272910bb1355bb3c45dc4976d71c1152eb723</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="37" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[37]</anchor-end> <cite xml:lang="en">Cleaning up 'optionally-blockable'.</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">mikewest</anchor>著, <time>2017-10-20 16:45:38 +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/w3c/webappsec-mixed-content/commit/2ff806843a8e634d7d47484db185b995d2d6a95c">https://github.com/w3c/webappsec-mixed-content/commit/2ff806843a8e634d7d47484db185b995d2d6a95c</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="38" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[38]</anchor-end> <cite xml:lang="en">Fixing link to 'use srcset or picture'.</cite>
(<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">mikewest</anchor>著, <time>2017-10-23 16:32:08 +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/w3c/webappsec-mixed-content/commit/e6220c8d697475562b778b41d18f9623a24c17cd">https://github.com/w3c/webappsec-mixed-content/commit/e6220c8d697475562b778b41d18f9623a24c17cd</anchor-external></p><hr></hr><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="40" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[40]</anchor-end> 
<code>picture</code> が有意義に使われている例はほとんど見かけません。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="41" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[41]</anchor-end> 
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">WordPress</anchor> が (プラグインのどれかが?) 使っているので出現サイト数は無駄に多いみたいですが、
<code>picture</code> でもそうでなくても変わらないけど機械的に出力されているらしいものばかり。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="39" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[39]</anchor-end> <cite xml:lang="ja">暮らしに役立つプラットフォーム【ruum】(ルーム)</cite>, <time>2023-02-23T02:15:31.000Z</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://www.ruum.me/shop/default.aspx">https://www.ruum.me/shop/default.aspx</anchor-external></p><blockquote><pre class="HTML code">      &lt;picture&gt;&lt;img class=&quot;fade-in lazyloaded&quot; data-src=&quot;/img/header/logo.svg&quot; src=&quot;/img/header/logo.svg&quot;&gt;&lt;/picture&gt;&lt;/a&gt;</pre></blockquote><blockquote><pre class="HTML code">						&lt;picture&gt;&lt;img class=&quot;fade-in lazyload radius101000&quot; data-src=&quot;/img/cms/639/639_01.jpg&quot; decording=&quot;async&quot;&gt;
							&lt;div class=&quot;icon lato t-ss c-white new f-center&quot;&gt;NEW&lt;/div&gt;
							
							&lt;div class=&quot;favoriteBtn&quot; data-article=&quot;639&quot;&gt;
								
								&lt;img class=&quot;fade-in lazyload&quot; data-src=&quot;/img/new/common/icon_heart_white.svg&quot; decording=&quot;async&quot;&gt;
								
							&lt;/div&gt;
						&lt;/picture&gt;</pre></blockquote><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="42" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[42]</anchor-end> <anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="39" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;39</anchor-internal> これは <code>figure</code> と間違えている・・・というわけでもなさそうで謎</p><hr></hr><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="59" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[59]</anchor-end> 
<code>picture</code> 推進派は猛烈にプッシュしてついに全ブラウザーに実装させ
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Ian Hickson</anchor> もしぶしぶ <cite>HTML Standard</cite> に取り込んだのですけど、
その熱量はいったいどこから来てたんですかね。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="60" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[60]</anchor-end> 
あれから10年くらい経ちましたけど、いまいったいどれだけ <code>picture</code>
って使われてますか。 <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">WordPress</anchor> などで
<code>picture</code>
は使われているけど実態はただの <code>img</code> と大差ない、
みたいなのは量産されて出現頻度はそこまで低くないですけど、
<code>img</code> + <code>srcset</code> で記述できなくて <code>picture</code>
が生かされてる事例ってまだ見たことないです。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="61" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[61]</anchor-end> 
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RICG</anchor> も最初から <code>picture</code> + <code>source</code> の仕様案ありきであとから
use case / requirements を集めだしたりっていう酷い政治的ムーブかましてましたよね。
その use case は今実世界でどれだけありますか、どれだけ <code>picture</code>
使ってますか?</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="62" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[62]</anchor-end> 
やっぱり基本的には <code>srcset</code>、複雑なのは <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">JavaScript</anchor>、
ってのがいい、というか現実にそう運用されてるんじゃないですかねえ。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="63" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[63]</anchor-end> 
<code>srcset</code> ですら、高解像度の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">ディスプレイ</anchor>が <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">iPhone</anchor>
に搭載されたあの当時の一過性のブームみたいなもので等倍と2倍の画像を供給する必要があっただけで、
今はそんなに需要がないってのが実態じゃないですかね。
今じゃ高解像度の画像を1個用意するだけでいいし (その方が圧倒的に楽だし転送量も今やそんなに問題ではない)、
写真ではない図形なら <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">SVG</anchor> を使うのが一般的になっちゃいましたからね。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="64" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[64]</anchor-end> 
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Ian Hickson</anchor> のいうとおり、稀な用法のために <code>img</code> の処理モデルをスパゲッティー化させる必要なかったんじゃないですかねえ。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="66" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[66]</anchor-end> <cite>Picturefill</cite>, <time>2017-06-15T15:09:04.000Z</time>, <time>2024-09-08T05:25:27.230Z</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="http://scottjehl.github.io/picturefill/">http://scottjehl.github.io/picturefill/</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="65" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[65]</anchor-end> <cite xml:lang="en">Please Update Picturefill | CSS-Tricks</cite>, <time>2024-09-07T23:28:47.000Z</time>, <time>2024-09-08T05:24:23.786Z</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://css-tricks.com/please-update-picturefill/">https://css-tricks.com/please-update-picturefill/</anchor-external></p><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="67" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[67]</anchor-end> <cite xml:lang="en">GitHub - posthtml/posthtml-webp: Add webp supporting in your html</cite>, <time>2024-09-25T15:13:23.000Z</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/posthtml/posthtml-webp">https://github.com/posthtml/posthtml-webp</anchor-external></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="68" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[68]</anchor-end> 
<cite xml:lang="en">GitHub - posthtml/posthtml-sugar-srcset: This shortens the description of the value of srcset.</cite>, <time>2024-09-25T15:14:14.000Z</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/posthtml/posthtml-sugar-srcset">https://github.com/posthtml/posthtml-sugar-srcset</anchor-external></li></ul><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="69" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[69]</anchor-end> 
<anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="67" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;67</anchor-internal> これは <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">WebP</anchor> 対応ブラウザーとそれ以外の分岐のために <code>picture</code> を使った例。例といっても実利用例ではなくツールの利用例文だけど。
<anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="68" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;68</anchor-internal> は例文が人工的すぎて何がしたいのかよくわからない。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="70" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[70]</anchor-end> 
某サービスで <code>picture</code> を使ってるところみました。 <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">WebP</anchor> かどうかの分岐でした。
<time>2024-11-07T11:10:26.700Z</time></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="71" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[71]</anchor-end> フレームワークが機械的に <code>picture</code> を生成していると思われ、それ自体に実質的な意味を持たず、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">子供</anchor>に <code>img</code> が1つだけある事例をまた観測 <time>2026-03-03T02:33:40.794Z</time></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="72" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[72]</anchor-end> フレームワークは汎用性と高機能性を効率よく実現するために <code>picture</code> を使っていくつでも <code>img</code> を入れて切り替えさせられるように作っているのだけれども、実際の開発者には複数の <code>img</code> で切り替える需要がないので、こういうことになる <time>2026-03-03T02:35:08.996Z</time></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="73" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[73]</anchor-end> もし何かの理由、例えばPCとスマートフォンで画面設計を変えたい、というのがあるとしても、その場合必要な切り替えは画像の差し替えだけでは済まない。画像を差し替えなければならないほど画面設計が違うとなると、画像以外の要素構造にも大規模な切り替えが必要になる可能性が高く、すると <code>picture</code> だけブラウザーに選択させるメリットが皆無。むしろブラウザーの判定基準と独自部分の判定基準が一致せず齟齬が生じる境界領域が発生するリスクもあるから悪手。 <time>2026-03-03T02:39:16.705Z</time></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="74" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[74]</anchor-end> そこまでの大規模でなくても、 <code>picture</code> を使った切り替えと <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">CSS</anchor> との統合は中途半端なので、やはり <code>picture</code> と <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">CSS</anchor> の <code>@media</code> 等による分岐で境界領域が発生するリスクが残り、 <code>picture</code> を実運用に乗せるのはハードルが高い。 <time>2026-03-03T02:40:43.503Z</time></p></section></section></body></html>