Editorial: add a concept for Window's CustomElementRegistry

Author: annevk

source

@@ -12041,8 +12041,8 @@ console.assert(el.constructor === Element);</code></pre>
   <span>overridden constructor steps</span>:</p>
 
   <ol>
-   <li><p>Let <var>registry</var> be the <span>current global object</span>'s
-   <code>CustomElementRegistry</code> object.</p></li>
+   <li><p>Let <var>registry</var> be <span>current global object</span>'s <span
+   data-x="global-custom-element-registry">custom element registry</span>.</p></li>
 
    <li>
     <p>If <span>NewTarget</span> is equal to the <span>active function
@@ -12065,23 +12065,25 @@ document.createElement("bad-1");  // (2)</code></pre>
    </li>
 
    <li>
-    <p>Let <var>definition</var> be the entry in <var>registry</var> with <span
+    <p>Let <var>definition</var> be the item in <var>registry</var>'s <span>custom element
+    definition set</span> with <span
     data-x="concept-custom-element-definition-constructor">constructor</span> equal to
-    <span>NewTarget</span>. If there is no such definition, then throw a <code>TypeError</code>.</p>
+    <span>NewTarget</span>. If there is no such item, then throw a <code>TypeError</code>.</p>
 
-    <p class="note">Since there can be no entry in <var>registry</var> with a <span
+    <p class="note">Since there can be no item in <var>registry</var>'s <span>custom element
+    definition set</span> with a <span
     data-x="concept-custom-element-definition-constructor">constructor</span> of undefined, this
     step also prevents HTML element constructors from being called as functions (since in that case
     <span>NewTarget</span> will be undefined).</p>
    </li>
 
-   <li><p>Let <var>is value</var> be null.</p></li>
+   <li><p>Let <var>isValue</var> be null.</p></li>
 
    <li>
     <p>If <var>definition</var>'s <span data-x="concept-custom-element-definition-local-name">local
     name</span> is equal to <var>definition</var>'s <span
     data-x="concept-custom-element-definition-name">name</span> (i.e., <var>definition</var> is for
-    an <span>autonomous custom element</span>), then:</p>
+    an <span>autonomous custom element</span>):</p>
 
     <ol>
      <li>
@@ -12130,15 +12132,15 @@ document.createElement("bad-1");  // (2)</code></pre>
       </div>
      </li>
 
-     <li><p>Set <var>is value</var> to <var>definition</var>'s <span
+     <li><p>Set <var>isValue</var> to <var>definition</var>'s <span
      data-x="concept-custom-element-definition-name">name</span>.</p></li>
     </ol>
    </li>
 
    <li>
     <p>If <var>definition</var>'s <span
     data-x="concept-custom-element-definition-construction-stack">construction stack</span> is
-    empty, then:</p>
+    empty:</p>
 
     <ol>
      <li><p>Let <var>element</var> be the result of <span data-x="internally create a new object
@@ -12167,7 +12169,7 @@ document.createElement("bad-1");  // (2)</code></pre>
      element definition</span> to <var>definition</var>.</p></li>
 
      <li><p>Set <var>element</var>'s <span data-x="concept-element-is-value"><code
-     data-x="">is</code> value</span> to <var>is value</var>.</p></li>
+     data-x="">is</code> value</span> to <var>isValue</var>.</p></li>
 
      <li><p>Return <var>element</var>.</p></li>
     </ol>
@@ -72625,7 +72627,7 @@ document.body.append(parent);
    null, then return null.</p></li>
 
    <li><p>Let <var>registry</var> be <var>document</var>'s <span>relevant global object</span>'s
-   <code>CustomElementRegistry</code> object.</p></li>
+   <span data-x="global-custom-element-registry">custom element registry</span>.</p></li>
 
    <li><p>If <var>registry</var>'s <span>custom element definition set</span> <span data-x="list
    contains">contains</span> an item with <span
@@ -72646,9 +72648,10 @@ document.body.append(parent);
 
   <h4 id="custom-elements-api">The <code>CustomElementRegistry</code> interface</h4>
 
-  <p w-nodev>Each <code>Window</code> object is associated with a unique instance of a
-  <code>CustomElementRegistry</code> object, allocated when the <code>Window</code> object is
-  created.</p>
+  <p w-nodev>Each <code>Window</code> object has an associated <dfn
+  data-x="global-custom-element-registry">custom element registry</dfn> (a
+  <code>CustomElementRegistry</code> object). It is set to a new
+  <code>CustomElementRegistry</code> object when the <code>Window</code> object is created.</p>
 
   <p class="note">Custom element registries are associated with <code>Window</code> objects, instead
   of <code>Document</code> objects, since each <span>custom element constructor</span> inherits from