Add form.requestSubmit()

Closes #4187.

Tests: web-platform-tests/wpt#16743.

source

@@ -43117,6 +43117,7 @@ interface <dfn>HTMLFormElement</dfn> : <span>HTMLElement</span> {
   <a href="#dom-form-nameditem">getter</a> (<span>RadioNodeList</span> or <span>Element</span>) (DOMString name);
 
   void <span data-x="dom-form-submit">submit</span>();
+  void <span data-x="dom-form-requestSubmit">requestSubmit</span>(optional <span>HTMLElement</span> submitter);
   [<span>CEReactions</span>] void <span data-x="dom-form-reset">reset</span>();
   boolean <span data-x="dom-form-checkValidity">checkValidity</span>();
   boolean <span data-x="dom-form-reportValidity">reportValidity</span>();
@@ -43228,7 +43229,30 @@ interface <dfn>HTMLFormElement</dfn> : <span>HTMLElement</span> {
 
    <dd>
 
-    <p>Submits the form.</p>
+    <p>Submits the form, bypassing <span data-x="interactively validate the constraints">interactive
+    constraint validation</span> and without firing a <code data-x="event-submit">submit</code>
+    event.</p>
+
+   </dd>
+
+   <dt><var>form</var> . <code subdfn data-x="dom-form-requestSubmit">requestSubmit</code>( [ <var>submitter</var> ] )</dt>
+
+   <dd>
+
+    <p>Requests to submit the form. Unlike <code data-x="dom-form-submit">submit()</code>, this
+    method includes <span data-x="interactively validate the constraints">interactive constraint
+    validation</span> and firing a <code data-x="event-submit">submit</code> event, either of which
+    can cancel submission.</p>
+
+    <p>The <var>submitter</var> argument can be used to point to a specific <span
+    data-x="concept-submit-button">submit button</span>, whose <code
+    data-x="attr-fs-formaction">formaction</code>, <code
+    data-x="attr-fs-formenctype">formenctype</code>, <code
+    data-x="attr-fs-formmethod">formmethod</code>, <code
+    data-x="attr-fs-formnovalidate">formnovalidate</code>, and <code
+    data-x="attr-fs-formtarget">formtarget</code> attributes can impact submission. Additionally,
+    the submitter will be included when <span>constructing the entry list</span> for submission;
+    normally, buttons are excluded.</p>
 
    </dd>
 
@@ -43458,6 +43482,28 @@ interface <dfn>HTMLFormElement</dfn> : <span>HTMLElement</span> {
   element itself, with the <var>submitted from <code
   data-x="dom-form-submit">submit()</code> method</var> flag set.</p>
 
+  <p>The <dfn><code data-x="dom-form-requestSubmit">requestSubmit(<var>submitter</var>)</code></dfn>
+  method, when invoked, must run the following steps:</p>
+
+  <ol>
+   <li>
+    <p>If <var>submitter</var> was given, then:</p>
+
+    <ol>
+     <li><p>If <var>submitter</var> is not a <span data-x="concept-submit-button">submit
+     button</span>, then throw a <code>TypeError</code>.</p></li>
+
+     <li><p>If <var>submitter</var>'s <span>form owner</span> is not this <code>form</code> element,
+     then throw a <span>"<code>NotFoundError</code>"</span> <code>DOMException</code>.</p></li>
+    </ol>
+   </li>
+
+   <li><p>Otherwise, set <var>submitter</var> to this <code>form</code> element.</p></li>
+
+   <li><p><span data-x="concept-form-submit">Submit</span> this <code>form</code> element, from
+   <var>submitter</var>.</p></li>
+  </ol>
+
   <p>The <dfn><code data-x="dom-form-reset">reset()</code></dfn> method, when invoked, must run the
   following steps:</p>
 
@@ -123125,6 +123171,7 @@ INSERT INTERFACES HERE
   Malcolm Rowe,
   Manish Goregaokar,
   Manish Tripathi,
+  Manuel Martinez-Almeida,
   Marc Hoyois,
   Marc-André Choquette, <!-- eel-in-a-hovercraft on GitHub -->
   Marc-André Lafortune,
@@ -123214,6 +123261,7 @@ INSERT INTERFACES HERE
   Mounir Lamouri,
   Ms2ger,
   mtrootyy,
+  邱慕安 (Mu-An<!--grammar-check-override--> Chiou),
   Mukilan Thiyagarajan,
   Mustaq Ahmed,
   Nadia Heninger,