Add support for inputactionlabel.

inputactionlabel allows an author to configure what type of iconify is
displayed in place for the enter key on virtual keyboards.

Tests: Soon

Author: dtapuska

source

@@ -11365,6 +11365,7 @@ https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C%21DOCTYPE%20HTML%3E%
    <li><code data-x="attr-dir">dir</code></li>
    <li><code data-x="attr-draggable">draggable</code></li>
    <li><code data-x="attr-hidden">hidden</code></li>
+   <li><code data-x="attr-inputactionlabel">inputactionlabel</code></li>
    <li><code data-x="attr-inputmode">inputmode</code></li>
    <li><code data-x="attr-is">is</code></li>
    <li><code data-x="attr-itemid">itemid</code></li>
@@ -73816,6 +73817,7 @@ addShortcutKeyLabel(document.getElementById('c'));</code></pre>
   <pre><code class="idl" data-x="">interface mixin <dfn>ElementContentEditable</dfn> {
   [<span>CEReactions</span>] attribute DOMString <span data-x="dom-contentEditable">contentEditable</span>;
   readonly attribute boolean <span data-x="dom-isContentEditable">isContentEditable</span>;
+  [<span>CEReactions</span>] attribute DOMString <span data-x="dom-inputActionLabel">inputActionLabel</span>;
   [<span>CEReactions</span>] attribute DOMString <span data-x="dom-inputMode">inputMode</span>;
 };</code></pre>
 
@@ -74493,6 +74495,58 @@ body { display:none }
 
   </div>
 
+  <h4>Input modalities: the <code data-x="attr-inputactionlabel">inputactionlabel</code>
+  attribute</h4>
+
+  <p>User agents can support the <code data-x="attr-inputactionlabel">inputactionlabel</code>
+  attribute on form controls (such as the value of <code>textarea</code> elements), or in elements
+  in an <span>editing host</span> (e.g., using <code
+  data-x="attr-contenteditable">contenteditable</code>).</p>
+
+  <p>The <dfn><code data-x="attr-inputactionlabel">inputactionlabel</code></dfn> content attribute
+  is an <span>enumerated attribute</span> that specifies what action label (or icon) to present for
+  the enter key on virtual keyboards would be most helpful for users entering content.</p>
+
+  <table>
+   <thead>
+    <tr>
+     <th> Keyword
+     <th> Description
+   <tbody>
+    <tr>
+     <td><dfn><code data-x="attr-inputactionlabel-keyword-enter">enter</code></dfn>
+     <td>The user agent should present a cue for the operation 'enter'.
+    <tr>
+     <td><dfn><code data-x="attr-inputactionlabel-keyword-done">done</code></dfn>
+     <td>The user agent should present a cue for the operation 'done'.
+    <tr>
+     <td><dfn><code data-x="attr-inputactionlabel-keyword-go">go</code></dfn>
+     <td> The user agent should present a cue for the operation 'go'.
+    <tr>
+     <td><dfn><code data-x="attr-inputactionlabel-keyword-next">next</code></dfn>
+     <td>The user agent should present a cue for the operation 'next'.
+    <tr>
+     <td><dfn><code data-x="attr-inputactionlabel-keyword-search">search</code></dfn>
+     <td>The user agent should present a cue for the operation 'search'.
+    <tr>
+     <td><dfn><code data-x="attr-inputactionlabel-keyword-send">send</code></dfn>
+     <td> The user agent should present a cue for the operation 'send'.
+  </table>
+
+  <div w-nodev>
+
+  <p>The <dfn><code data-x="dom-inputActionLabel">inputActionLabel</code></dfn> IDL attribute must
+  <span>reflect</span> the <code data-x="attr-inputactionlabel">inputactionlabel</code> content
+  attribute, <span>limited to only known values</span>.</p>
+
+  <p>When <code data-x="attr-inputactionlabel">inputactionlabel</code> is unspecified (or is in a
+  state not supported by the user agent), the user agent should determine the default action type to
+  be shown. Contextual information such as the <code data-x="attr-inputmode">inputmode</code>, <code
+  data-x="attr-input-type">type</code>, or <code data-x="attr-input-pattern">pattern</code>
+  attributes should be used to determine which action should be presented on the virtual keyboard.</p>
+
+  </div>
+
   <h3 split-filename="dnd" id="dnd"><dfn>Drag and drop</dfn></h3>
 
 <!-- v2: ideas for drag and drop:
@@ -118498,6 +118552,16 @@ interface <dfn>External</dfn> {
           "<code data-x="attr-inputmode-keyword-numeric">numeric</code>";
           "<code data-x="attr-inputmode-keyword-decimal">decimal</code>";
           "<code data-x="attr-inputmode-keyword-search">search</code>"
+    <tr>
+     <th> <code data-x="">inputactionlabel</code>
+     <td> <span data-x="attr-inputactionlabel">HTML elements</span>
+     <td> Hint for selecting an input action
+     <td> "<code data-x="attr-inputactionlabel-keyword-enter">enter</code>";
+          "<code data-x="attr-inputactionlabel-keyword-done">done</code>";
+          "<code data-x="attr-inputactionlabel-keyword-go">go</code>";
+          "<code data-x="attr-inputactionlabel-keyword-next">next</code>";
+          "<code data-x="attr-inputactionlabel-keyword-search">search</code>"
+          "<code data-x="attr-inputactionlabel-keyword-send">send</code>"
     <tr>
      <th> <code data-x="">integrity</code>
      <td> <code data-x="attr-link-integrity">link</code>;