Address initial PR feedback: add TODO about MIME type to HTML Module …

…doc creation, remove non-quirks mode assignment and add origin assignment for new HTML Module doc, replace '=' usage with 'to', and clarify note about HTML Module script execution in prepare-a-script.

source

@@ -58354,9 +58354,14 @@ o............A....e
 
    </li>
 
-   <li><p>If the element's <span>node document</span> is an <span>HTML module document</span>, then
-   return.  The script will be executed as part of <span
-   data-x="js-Evaluate">module graph evaluation</span>.</p></li>
+   <li>
+    <p>If the element's <span>node document</span> is an <span>HTML module document</span>, then
+    return.</p>
+
+    <p class="note">This means that scripts that are dynamically added to an HTML Module document
+    will not execute.  The scripts that were originally part of the HTML Module document at parse
+    time will be executed as part of <span data-x="js-Evaluate">module graph evaluation</span>.</p>
+   </li>
 
    <li>
 
@@ -79885,6 +79890,10 @@ interface <dfn>BarProp</dfn> {
      data-x="concept-document-bc">browsing context</span>'s <span>browsing context
      container</span>'s <span>node document</span>.</p></dd>
 
+     <dt>If the <code>Document</code> is an <span>HTML Module document</span></dt>
+
+     <dd><p>The <span>origin</span> that the <code>Document</code> was assigned when it was created
+     during <span>ParseHTMLModule</span>.</p></dd>
 
      <dt>If the <code>Document</code> was obtained in some other manner (e.g. a <code>Document</code>
      created using the <code data-x="dom-DOMImplementation-createDocument">createDocument()</code>
@@ -87249,7 +87258,7 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
     <p>For each <span>ScriptEntry</span> <var>scriptEntry</var> in
     <var>module</var>.[[RequestedModules]], do:</p>
     <ol>
-     <li><p>If <var>scriptEntry</var>.[[ExternalScriptURL]] != null, continue to the next
+     <li><p>If <var>scriptEntry</var>.[[ExternalScriptURL]] is not null, continue to the next
      <span>ScriptEntry</span>.</p></li>
 
      <li><p>Let <var>importedModule</var> be <var>scriptEntry</var>.[[InlineModuleRecord]]).</p>
@@ -88007,8 +88016,8 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
       <var>scriptEntries</var>:</p>
 
       <ol>
-       <li><p>If <var>scriptEntry</var>'s <span>ExternalScriptURL</span> is not null, then perform the
-       following steps:</p>
+       <li><p>If <var>scriptEntry</var>'s <span>ExternalScriptURL</span> is not null, then perform
+       the following steps:</p>
 
         <ol>
          <li><p>Let <var>childURL</var> be the result result of calling
@@ -88261,12 +88270,19 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
   <var>htmlModuleScript</var>) as the following:</p>
 
   <ol>
-   <li><p>Create a new <span>Document</span> node <var>document</var> whose
-   <span data-x="concept-document-content-type">content type</span> is
-   <code data-x="">text/html</code> and mark it as being an <span
-   data-x="HTML documents">HTML document</span>.  Let <var>document</var> be in
-   <span>no-quirks mode</span>.  <var>document</var> must be considered an
-   <span>HTML module document</span>.</p></li>
+   <li>
+    <p>Create a new <span>Document</span> node <var>document</var> whose <span
+    data-x="concept-document-content-type">content type</span> is the
+    <span>HTML Module MIME type</span> and whose <span>origin</span> is
+    <var>htmlModuleScript</var>'s <span>settings object</span>'s <span>origin</span>, and mark it as
+    being an <span data-x="HTML documents">HTML document</span>.  This <var>document</var> must be
+    considered an <span>HTML module document</span>.</p>
+
+    <p>TODO(HTMLModules): Discussion is still ongoing regarding whether the
+    <span>HTML Module MIME type</span> will be <code>text/html</code> or a new type introduced for
+    HTML Modules.  See discussion <a
+    href="https://github.com/w3c/webcomponents/issues/742">here</a>.</p>
+  </li>
 
    <li><p>Create a new <span>HTML parser</span>, and associate it with <var>document</var>.</p></li>
 
@@ -88292,18 +88308,19 @@ interface <dfn>ApplicationCache</dfn> : <span>EventTarget</span> {
       <p>If <var>script</var> is inline:</p>
 
       <ol>
-       <li><p>Set <var>scriptEntry</var>.[[InlineModuleRecord]] = <var>script</var>'s
+       <li><p>Set <var>scriptEntry</var>.[[InlineModuleRecord]] to <var>script</var>'s
        <span>Source Text Module Record</span>.</p></li>
 
-       <li><p>Set <var>scriptEntry</var>.[[ExternalScriptURL]] = null.</p></li>
+       <li><p>Set <var>scriptEntry</var>.[[ExternalScriptURL]] to null.</p></li>
       </ol>
       <li>
        <p>Otherwise:</p>
 
        <ol>
-        <li><p>Set <var>scriptEntry</var>.[[InlineModuleRecord]] = null.</p></li>
+        <li><p>Set <var>scriptEntry</var>.[[InlineModuleRecord]] to null.</p></li>
 
-        <li><p>Set <var>scriptEntry</var>.[[ExternalScriptURL]] = *script’s* src URL.</p></li>
+        <li><p>Set <var>scriptEntry</var>.[[ExternalScriptURL]] to the value of <var>script</var>’s
+        <code data-x="attr-script-src">src</code> attribute.</p></li>
        </ol>
       </li>
      <li><p>Append <var>scriptEntry</var> to <var>scriptEntries</var>.</p></li>
@@ -107239,7 +107256,8 @@ document.body.appendChild(text);
    <dd>
 
     <p>If the document is <em>not</em> <span>an <code>iframe</code> <code
-    data-x="attr-iframe-srcdoc">srcdoc</code> document</span>, then this is a <span>parse
+    data-x="attr-iframe-srcdoc">srcdoc</code> document</span> nor an
+    <span>HTML module document</span>, then this is a <span>parse
     error</span>; set the <code>Document</code> to <span>quirks mode</span>.</p>
 
     <p>In any case, switch the <span>insertion mode</span> to "<span data-x="insertion mode: before