[HTML] Add an introduction for scoped custom element registries whatwg/html@307f1ad

Author: triple-underscore

HTML-custom-ja.html

@@ -172,8 +172,8 @@
 
 ●●options
 
-spec_date:2025-07-24
-trans_update:2025-07-25
+spec_date:2025-07-29
+trans_update:2025-07-30
 source_checked:250314
 page_state_key:HTML
 spec_status:LS
@@ -339,6 +339,7 @@
 保存-:save:~
 予備の:backup::~
 内部特能:internals::~
+	視野~付き:scoped
 
 	●form提出
 無毒化:sanitization::~
@@ -422,6 +423,8 @@
 地点:points:~
 排他的:exclusive:~
 理屈:reasoning:~
+協調:coordination:~
+共存-:co-exist:~
 
 	作者に公開される:author-exposed
 	予期されない:unexpected
@@ -646,11 +649,12 @@
 
 m.attachInternals:#dom-attachinternals
 m.attachShadow:~DOM4#dom-element-attachshadow
+
+	＠~HTMLdynamic#dom-document-open
+	＠~HTMLdynamic#dom-document-write
 	＠~DOM4#dom-parentnode-movebefore
 	＠~HEforms#dom-form-elements
-
-m.document.open:~HTMLdynamic#dom-document-open
-m.document.write:~HTMLdynamic#dom-document-write
+	＠~HTMLdynamic#dom-element-sethtmlunsafe
 
 mb.extends:#dom-elementdefinitionoptions-extends
 
@@ -1921,9 +1925,35 @@ <h5 title="Upgrading elements after their creation">4.13.1.6. 要素の作成~
 &lt;/script&gt;
 </pre>
 
+				</section>
+				<section id="scoped-custom-element-registries">
+<h5 title="Scoped custom element registries">4.13.1.7 視野~付きな~custom要素~registry</h5>
+
+<p>
+複数の~libraryが明示的な協調を伴わずに共存することを許容するため、
+`CustomElementRegistry$I は，`視野~付き＠#is-scoped$な流儀でも利用できる。
+◎
+To allow multiple libraries to co-exist without explicit coordination, CustomElementRegistry can be used in a scoped fashion as well.
+</p>
+
+<pre class="lang-js">
+const %scoped = new CustomElementRegistry();
+%scoped.define("example-element", ExampleElement);
+
+const %element = document.createElement("example-element", { customElementRegistry: %scoped });
+</pre>
+
+<p>
+視野~付きな `CustomElementRegistry$I %scoped が結付けられた~node %element は、
+%element に対する どの演算にも %scoped を利用することになる
+— `setHTMLUnsafe()＠~HTMLdynamic#dom-element-sethtmlunsafe$c を呼出すときなど。
+◎
+A node with an associated scoped CustomElementRegistry will use that registry for all its operations, such as when invoking setHTMLUnsafe().
+</p>
+
 				</section>
 				<section id="exposing-custom-element-states">
-<h5 title="Exposing custom element states">4.13.1.7. ~custom要素~状態の公開-法</h5>
+<h5 title="Exposing custom element states">4.13.1.8. ~custom要素~状態の公開-法</h5>
 
 <p>
 ~UAにより供される組込みの要素には、［
@@ -2013,7 +2043,8 @@ <h4 title="Requirements for custom element constructors and reactions">4.13.2. ~
 </li>
 	<li>
 構築子は、［
-`document.write()$m ／ `document.open()$m
+`document.write()＠~HTMLdynamic#dom-document-write$c ／
+`document.open()＠~HTMLdynamic#dom-document-open$c
 ］~methodを利用してはナラナイ。
 ◎
 The constructor must not use the document.write() or document.open() methods.