Integrate changes from HTMLLS (#463)

* Merge more stuff from HTMLLS

* Correct url to https

* Integrate ec1dc4d4571c61cf0c0dfe3e562898635886b412

* Changed for f5d8c99753f17cb8f384c6ad6650378ef5d9f52c

* changes for b437a803c2310d8fb2e05aef343ea24166afb9fd

* Add text for 925ffb821f49bcf6dcec88ca756e0189879d5462

* Editorial b466ad7ce49676873ddade4c473b7c983803bfd4

sections/acknowledgements.include

@@ -96,6 +96,7 @@
   Atsushi Takayama,
   Aurelien Levy,
   Ave Wrigley,
+  Avi Drissman,
   Axel Dahmen,
   Bart Humphries,
   Ben Boyle,
@@ -124,6 +125,7 @@
   Brad Neuberg,
   Brad Spencer,
   Brady Eidson,
+  Brandon Jones,
   Brendan Eich,
   Brenton Simpson,
   Brett Wilson,
@@ -738,6 +740,7 @@
   Trevor Saunders,
   triple-underscore, <!-- on GitHub -->
   Tyler Close,
+  Valentin Gosu,
   Victor Carbune,
   Vipul Snehadeep Chawathe,
   Vitya Muhachev,

sections/browsers.include

@@ -4784,12 +4784,12 @@
     agent should ask the user to confirm that they wish to unload the document.
 
     The prompt shown by the user agent may include the string of the
-    {{BeforeUnloadEvent/returnValue}} attribute, or some leading subset thereof. (A user agent may
-    want to truncate the string to 1024 characters for display, for instance.)
+    {{BeforeUnloadEvent/returnValue}} attribute, or <a>optionally truncated</a>.
 
     The user agent must <a state for="useragent">pause</a> while waiting for the user's response.
 
-    If the user did not confirm the page navigation, then the user agent <dfn lt="refused to allow the document to be unloaded|refused to allow this document to be unloaded">refused to allow the document to be unloaded</dfn>.
+    If the user did not confirm the page navigation, then the user agent
+    <dfn lt="refused to allow the document to be unloaded|refused to allow this document to be unloaded">refused to allow the document to be unloaded</dfn>.
 
     </li>
 

sections/dom.include

@@ -732,7 +732,7 @@
       void blur();
       attribute DOMString accessKey;
       attribute boolean draggable;
-      [PutForwards=value] readonly attribute DOMTokenList dropzone;
+      [SameObject, PutForwards=value] readonly attribute DOMTokenList dropzone;
       attribute HTMLMenuElement? contextMenu;
       attribute boolean spellcheck;
       void forceSpellCheck();

sections/editing.include

@@ -1013,7 +1013,7 @@
   also happen to an <{input}> element when the element gets disabled.
   </p>
 
-  <dfn>Focus fixup rule two</dfn>: When a <a>dialog group</a> has no designed <a>focused
+  <dfn>Focus fixup rule two</dfn>: When a <a>dialog group</a> has no designated <a>focused
   dialog of the dialog group</a>, and its <a>dialog group manager</a>'s <a>control
   group</a> changes from being non-empty to being empty, the first non-<a>inert</a>
   <code>dialog</code> in the <a>dialog group</a>, if any, or else the first <code>dialog</code> in
@@ -1067,8 +1067,6 @@
 
   <ol>
 
-    <li>Unset the <a>sequential focus navigation starting point</a>.</li>
-
     <li>If the last entry in <var>old chain</var> and the last entry in <var>new chain</var> are the same, pop the last entry from <var>old chain</var>
     and the last entry from <var>new chain</var> and redo this step.</li>
 

sections/events.include

@@ -71,7 +71,7 @@
         <td><dfn event for="global"><code>change</code></dfn></td>
         <td>{{Event}}</td>
         <td>Form controls</td>
-        <td>Fired at controls when the user commits a value change (see also the <a event for="global"><code>change</code></a> event of <{input}> elements)</td>
+        <td>Fired at controls when the user commits a value change (see also the <a event for="global"><code>input</code></a> event)</td>
       </tr>
       <tr> <!-- click -->
         <td><a event><code>click</code></a></td>
@@ -128,7 +128,7 @@
         <td><dfn event for="global"><code>input</code></dfn></td>
         <td>{{Event}}</td>
         <td>Form controls</td>
-        <td>Fired at controls when the user changes the value (see also the <a><code>change</code></a> event of <{input}> elements)</td>
+        <td>Fired at controls when the user changes the value (see also the <a event for="global"><code>change</code></a> event)</td>
       </tr>
       <tr> <!-- invalid -->
         <td><dfn event for="global"><code>invalid</code></dfn></td>

sections/infrastructure.include

@@ -3770,8 +3770,7 @@
 
   If a reflecting IDL attribute has the type {{DOMTokenList}}, then on getting it must return a
   {{DOMTokenList}} object whose associated element is the element in question and whose associated
-  attribute's local name is the name of the attribute in question. The same {{DOMTokenList}}
-  object must be returned every time for each attribute.
+  attribute's local name is the name of the attribute in question.
 
   If a reflecting IDL attribute has the type {{HTMLElement}}, or an interface that
   descends from {{HTMLElement}}, then, on getting, it must run the following algorithm

sections/semantics-document-metadata.include

@@ -353,11 +353,11 @@
           attribute DOMString? crossOrigin;
           attribute DOMString rel;
           attribute DOMString rev;
-          readonly attribute DOMTokenList relList;
+          [SameObject, PutForwards=value]readonly attribute DOMTokenList relList;
           attribute DOMString media;
           attribute DOMString hreflang;
           attribute DOMString type;
-          [PutForwards=value] readonly attribute DOMTokenList sizes;
+          [SameObject, PutForwards=value] readonly attribute DOMTokenList sizes;
         };
         HTMLLinkElement implements LinkStyle;
       </pre>

sections/semantics-embedded-content.include

@@ -3461,7 +3461,7 @@ My <img src="heart.png" alt="heart"> breaks.
           attribute DOMString src;
           attribute DOMString srcdoc;
           attribute DOMString name;
-          [PutForwards=value] readonly attribute DOMTokenList sandbox;
+          [SameObject, PutForwards=value] readonly attribute DOMTokenList sandbox;
           attribute boolean allowFullscreen;
           attribute DOMString width;
           attribute DOMString height;
@@ -11743,7 +11743,7 @@ red:89
           attribute DOMString target;
           attribute DOMString download;
           attribute DOMString rel;
-          readonly attribute DOMTokenList relList;
+          [SameObject, PutForwards=value] readonly attribute DOMTokenList relList;
           attribute DOMString hreflang;
           attribute DOMString type;
         };
@@ -12099,7 +12099,7 @@ red:89
 
       The shape is a circle whose center is <var>x</var> CSS pixels from the left edge
       of the image and <var>y</var> CSS pixels from the top edge of the image, and whose
-      radius is <var>r</var> pixels.
+      radius is <var>r</var> CSS pixels.
 
       </dd>
 

sections/semantics-forms.include

@@ -9210,7 +9210,7 @@ Daddy"></textarea>
     <dd>
       <pre class="idl" data-highlight="webidl" dfn-for="HTMLOutputElement">
         interface HTMLOutputElement : HTMLElement {
-          [PutForwards=value] readonly attribute DOMTokenList htmlFor;
+          [SameObject, PutForwards=value] readonly attribute DOMTokenList htmlFor;
           readonly attribute HTMLFormElement? form;
           attribute DOMString name;
 

sections/semantics-tabular-data.include

@@ -1474,7 +1474,7 @@ the cell that corresponds to the values of the two dice.
     interface HTMLTableCellElement : HTMLElement {
       attribute unsigned long colSpan;
       attribute unsigned long rowSpan;
-      [PutForwards=value] readonly attribute DOMTokenList headers;
+      [SameObject, PutForwards=value] readonly attribute DOMTokenList headers;
       readonly attribute long cellIndex;
     };
   </pre>

sections/semantics-textlevel.include

@@ -51,7 +51,7 @@
           attribute DOMString download;
           attribute DOMString rel;
           attribute DOMString rev;
-          readonly attribute DOMTokenList relList;
+          [SameObject, PutForwards=value] readonly attribute DOMTokenList relList;
           attribute DOMString hreflang;
           attribute DOMString type;
           attribute DOMString text;
@@ -1876,8 +1876,10 @@ affected by the heat source (upper left) and the food source (lower right).</
   descendants.
 
   The <dfn>datetime value</dfn> of a <{time}> element is the value of the element's
-  <code>datetime</code> content attribute, if it has one, or the
-  element's {{Node/textContent}}, if it does not.
+  <{time/datetime}> content attribute, if it has one, otherwise the concatenation of the contents of
+  all the <code>Text</code> nodes that are children of the <{time}> element (ignoring any other
+  nodes such as comments or elements), in <a>tree order</a>.
+
 
   The <a>datetime value</a> of a <{time}> element must match one of the following
   syntaxes.

sections/webappapis.include

@@ -574,10 +574,10 @@
     few seconds, prompt the user to either terminate the script or let it continue.
 
     <pre highlight="html">
-  &lt;script>
-  while (true) { /* loop */ }
-  &lt;/script>
-  </pre>
+      &lt;script>
+        while (true) { /* loop */ }
+      &lt;/script>
+    </pre>
   </div>
 
   User agents are encouraged to allow users to disable scripting whenever the user is prompted
@@ -686,8 +686,9 @@
   15. If <var>event</var> was canceled, then the error is <a for="script">handled</a>. Otherwise,
        the error is <a for="script">not handled</a>.
 
-       <p class="note">Returning true cancels event per <a>the event handler processing
-       algorithm</a>.</p>
+       <p class="note">
+         Returning true cancels <var>event</var> per <a>the event handler processing algorithm</a>.
+       </p>
 
 <h6 id="runtime-script-errors-in-documents">Runtime script errors in documents</h6>
 
@@ -2634,6 +2635,17 @@
   loading their <a>media data</a>, are stalled when these methods are invoked.
   </p>
 
+  To <dfn lt="optionally truncated|optionally truncating|optionally truncate a simple dialog string">optionally truncate a simple dialog string</dfn>
+  <var>s</var>, return either <var>s</var> itself or some string derived from <var>s</var> that is
+  shorter. User agents should not provide UI for displaying the elided portion of <var>s</var>, as
+  this makes it too easy for abusers to create dialogs of the form "Important security alert! Click
+  'Show More' for full details!".
+
+  <p class="note">For example, a user agent might want to only display the first 100 characters of a
+  message. Or, a user agent might replace the middle of the string with "&hellip;". These types of
+  modifications can be useful in limiting the abuse potential of unnaturally large,
+  trustworthy-looking system dialogs.</p>
+
   The <dfn method for="Window" lt="alert()|alert(message)"><code>alert(<var>message</var>)</code></dfn>
   method, when invoked, must run the following steps:
 
@@ -2662,7 +2674,7 @@
 
   </ol>
 
-  The <dfn><code>confirm(<var>message</var>)</code></dfn> method,
+  The <dfn method for="Window" lt="confirm()|confirm(message)"><code>confirm(<var>message</var>)</code></dfn> method,
   when invoked, must run the following steps:
 
   <ol>
@@ -2679,8 +2691,10 @@
     the user the option to ignore all prompts, and would thus abort at this step whenever the method
     was invoked.)</li>
 
-    <li>Show the given <var>message</var> to the user, and ask the user to respond with a
-    positive or negative response.</li>
+    <li>Set <var>message</var> to the result of <a>optionally truncating</a> <var>message</var>.</li>
+
+    <li>Show <var>message</var> to the user, and ask the user to respond with a positive or
+    negative response.</li>
 
     <li><a state for="useragent">Pause</a> until the user responds either positively or negatively.</li>
 
@@ -2689,7 +2703,7 @@
 
   </ol>
 
-  The <dfn><code>prompt(<var>message</var>, <var>default</var>)</code></dfn> method, when invoked, must run the following steps:
+  The <dfn method for="Window" lt="prompt()|prompt(message,default)"><code>prompt(<var>message</var>, <var>default</var>)</code></dfn> method, when invoked, must run the following steps:
 
   <ol>
 
@@ -2705,9 +2719,12 @@
     user the option to ignore all prompts, and would thus abort at this step whenever the method was
     invoked.)</li>
 
-    <li>Show the given <var>message</var> to the user, and ask the user to either respond
-    with a string value or abort. The response must be defaulted to the value given by
-    <var>default</var>.</li>
+    <li>Set <var>message</var> to the result of <a>optionally truncating</a> <var>message</var>.</li>
+
+    <li>Set <var>default</var> to the result of <a>optionally truncating</a> <var>default</var>.</li>
+
+    <li>Show <var>message</var> to the user, and ask the user to either respond with a string
+    value or abort. The response must be defaulted to the value given by <var>default</var>.</li>
 
     <li><a state for="useragent">Pause</a> while waiting for the user's response.</li>
 

single-page.bs

@@ -41,8 +41,6 @@ url: https://www.w3.org/TR/REC-xml-names#NT-QName; type: dfn;
     text: QName;
 url: https://drafts.csswg.org/css2/conform.html#intrinsic; type: dfn;
     text: intrinsic width and height;
-urlPrefix: https://www.w3.org/TR/2007/WD-becss-20071019/; type: property;
-    text: binding;
 url: https://www.w3.org/TR/1999/REC-xpath-19991116#dt-expanded-name; type: dfn;
     text: expanded-name;
 url: https://tools.ietf.org/html/rfc1034#section-3.5; type: dfn;