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Define the <selectedcontent> element #10633

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Define the <selectedcontent> element #10633

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21b8a2c
Define the `<selectedoption>` element
josepharhar Sep 18, 2024
1aece11
add dl
josepharhar Sep 27, 2024
a1bd1e8
index
josepharhar Sep 27, 2024
c04ca18
inline replacechildren
josepharhar Oct 4, 2024
09777e2
update content model of button element
josepharhar Oct 4, 2024
c846c3e
add clear a selectedoption
josepharhar Nov 4, 2024
bef82d0
nits
josepharhar Nov 4, 2024
daabd98
allow no selectedoption
josepharhar Nov 4, 2024
bf2b5c5
Merge remote-tracking branch 'upstream/main' into selectedoption
josepharhar Nov 4, 2024
8863966
dont track mutations
josepharhar Nov 4, 2024
17ac232
rename to selectedcontent
josepharhar Nov 4, 2024
4960a77
add parser cloning
josepharhar Nov 4, 2024
10d1a14
improve things
josepharhar Nov 11, 2024
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Original file line number Diff line number Diff line change
Expand Up @@ -1794,6 +1794,9 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<span>stack of open elements</span> of an <span>HTML parser</span>, then
<span>process internal resource links</span> given <var>insertedNode</var>'s
<span>node document</span>.</p></li>

<li><p>Run <span>maybe clone option into selectedoption</span> given
<var>insertedNode</var>.</p></li>
</ol>

<p>The <span data-x="concept-node-remove-ext">removing steps</span> for the HTML Standard, given
Expand Down Expand Up @@ -1838,6 +1841,9 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li><p>If <var>removedNode</var>'s <code data-x="attr-popover">popover</code> attribute is not in
the <span data-x="attr-popover-none-state">no popover state</span>, then run the <span>hide
popover algorithm</span> given <var>removedNode</var>, false, false, and false.</p></li>

<li><p>Run <span>maybe clone option into selectedoption</span> given
<var>oldParent</var>.</p></li>
</ol>

<p>A <dfn id="insert-an-element-into-a-document" data-x="node is inserted into a document"
Expand Down Expand Up @@ -3201,13 +3207,15 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li><dfn data-x="dom-Element-id" data-x-href="https://dom.spec.whatwg.org/#dom-element-id"><code>id</code></dfn> attribute</li>
<li><dfn data-x="dom-Element-setAttribute" data-x-href="https://dom.spec.whatwg.org/#dom-element-setattribute"><code>setAttribute()</code></dfn> method</li>
<li><dfn data-x-href="https://dom.spec.whatwg.org/#dom-node-textcontent"><code>textContent</code></dfn> attribute</li>
<li><dfn data-x="dom-parentnode-replacechildren" data-x-href="https://dom.spec.whatwg.org/#dom-parentnode-replacechildren"><code>replaceChildren()</code></dfn> method</li>

<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree">tree</dfn>, <dfn data-x-href="https://dom.spec.whatwg.org/#concept-shadow-tree">shadow tree</dfn>, and <dfn data-x-href="https://dom.spec.whatwg.org/#concept-node-tree">node tree</dfn> concepts</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-order">tree order</dfn> and <dfn data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-tree-order">shadow-including tree order</dfn> concepts</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-element" data-x="concept-element">element</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-child" data-x="concept-tree-child">child</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-root">root</dfn> and <dfn data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-root">shadow-including root</dfn> concepts</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor">inclusive ancestor</dfn>,
<dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-ancestor">ancestor</dfn>,
<dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-descendant">descendant</dfn>,
<dfn data-x="concept-shadow-including-ancestor" data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-ancestor">shadow-including ancestor</dfn>,
<dfn data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-descendant">shadow-including descendant</dfn>,
Expand Down Expand Up @@ -53304,6 +53312,9 @@ interface <dfn interface>HTMLSelectElement</dfn> : <span>HTMLElement</span> {
element, and all the <code>option</code> element children of all the <code>optgroup</code> element
children of the <code>select</code> element, in <span>tree order</span>.</p>

<p>Every <code>select</code> element has <dfn>select descendant selectedoption elements</dfn>,
which is a <span>list</span> of <code>selectedoption</code> elements, initially « ».</p>

<p>The <dfn element-attr for="select"><code data-x="attr-select-required">required</code></dfn>
attribute is a <span>boolean attribute</span>. When specified, the user will be required to select
a value before submitting the form.</p>
Expand Down Expand Up @@ -54156,6 +54167,61 @@ interface <dfn interface>HTMLOptionElement</dfn> : <span>HTMLElement</span> {

</div>

<p>To get the <dfn>option element ancestor select</dfn> given an <code>option</code>
<var>option</var>:</p>

<ol>
<li>
<p>For each <var>ancestor</var> of <var>option</var>'s <span
data-x="ancestor">ancestors</span>:</p>

<ol>
<li><p>If <var>ancestor</var> is a <code>select</code>, then return
<var>ancestor</var>.</p></li>
</ol>
</li>

<li><p>Return null.</p></li>
</ol>

<p>To <dfn>maybe clone option into selectedoption</dfn>, given an <code>Element</code>
<var>element</var>:</p>

<ol>
<li>
<p>For each <var>ancestor</var> of <var>element</var>'s <span
data-x="ancestor">ancestors</span>:</p>

<ol>
<li>
<p>If all of the following conditions are true:</p>

<ul>
<li><p><var>ancestor</var> is an <code>option</code> element;</p></li>

<li><p><var>ancestor</var> has a non-null <span>option element ancestor
select</span>;</p></li>

<li><p><var>ancestor</var>'s <span>option element ancestor select</span> is rendered as a
<span>drop-down box</span>;</p></li>

<li><p><var>ancestor</var>'s <span data-x="concept-option-selectedness">selectedness</span>
is true,</p></li>
</ul>

<p>then for each <var>selectedoption</var> of <var>ancestor</var>'s <span>option element
ancestor select</span>'s <span>select descendant selectedoption elements</span>, run
<span>clone an option into a selectedoption</span> given <var>ancestor</var> and
<var>selectedoption</var>.</p>
</li>
</ol>
</li>
</ol>

<p>Whenever an <code>option</code> <var>option</var>'s <span
data-x="concept-option-selectedness">selectedness</span> is set to true, run <span>maybe clone
option into selectedoption</span> given <var>option</var>.</p>

<dl class="domintro">
<dt><code data-x=""><var>option</var>.<span subdfn data-x="dom-option-selected">selected</span></code></dt>

Expand Down Expand Up @@ -55816,6 +55882,145 @@ interface <dfn interface>HTMLLegendElement</dfn> : <span>HTMLElement</span> {

</div>

<h4>The <dfn element><code>selectedoption</code></dfn> element</h4>

<dl class="element">
<dt><span data-x="concept-element-categories">Categories</span>:</dt>
<dd>None.</dd>
<dt><span data-x="concept-element-contexts">Contexts in which this element can be used</span>:</dt>
<dd>As a descendant of a <code>button</code> element which is a child of a <code>select</code>
element.</dd>
<dt><span data-x="concept-element-content-model">Content model</span>:</dt>
<dd><span data-x="concept-content-nothing">Nothing</span>.</dd>
<dt><span data-x="concept-element-attributes">Content attributes</span>:</dt>
<dd><span>Global attributes</span></dd>
<dt><span
data-x="concept-element-accessibility-considerations">Accessibility considerations</span>:</dt>
<dd><a href="https://w3c.github.io/html-aria/#el-selectedoption">For authors</a>.</dd>
<dd><a href="https://w3c.github.io/html-aam/#el-selectedoption">For implementers</a>.</dd>
<dt><span data-x="concept-element-dom">DOM interface</span>:</dt>
<dd w-nodev>
<pre><code class="idl">[Exposed=Window]
interface <dfn interface>HTMLSelectedOptionElement</dfn> : <span>HTMLElement</span> {
[<span>HTMLConstructor</span>] constructor();
};</code></pre>
</dd>
<dd w-dev>Uses <code>HTMLSelectedOptionElement</code>.</dd>
</dl>

<p>The <code>selectedoption</code> element reflects the contents of a <code>select</code>
element's currently selected <code>option</code> element. <code>selectedoption</code> elements can
be used to declaratively show the selected <code>option</code> element's contents in a different
part of the document, such as the <code>select</code> element's invoker button, with alternate
rendering based on different selectors in the author's stylesheet.</p>

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<p>Every time the selected <code>option</code> of a <code>select</code> switches from one option
to another, or the currently selected <code>option</code>'s descendant DOM structure mutates, the
<code>selectedoption</code> element removes all of its children and replaces them with a new
cloned copy of the DOM structure of the <code>select</code>'s selected <code>option</code>
element.</p>

<p><code>selectedoption</code> elements become associated with <code>select</code> elements when
the <code>selectedoption</code> is a <span>descendant</span> of the <code>select</code>.</p>

<p>To <dfn>clone an option into a selectedoption</dfn>, given an <code>option</code> element
<var>option</var> and a <code>selectedoption</code> element <var>selectedOption</var>:</p>

<ol>
<li><p>Let <var>nodes</var> be « ».</p></li>

<li>
<p>If <var>option</var> is not null, then for each <var>child</var> of <var>option</var>'s <span
data-x="concept-tree-child">children</span>:</p>

<ol>
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<li><p>Let <var>childClone</var> be the result of running <span
data-x="concept-node-clone">clone</span> given <var>child</var>, null, true.</p></li>

<li><p><span data-x="list append">Append</span> <var>childClone</var> to
<var>nodes</var>.</p></li>
</ol>
</li>

<li><p>Run <span data-x="dom-parentnode-replacechildren">replaceChildren</span> on
<var>selectedOption</var> given <var>nodes</var>.</p></li>
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</ol>

<p>The <code>selectedoption</code> <span>HTML element insertion steps</span>, given
<var>selectedoption</var>, are:</p>

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<ol>
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<li><p>Let <var>firstAncestorSelect</var> be null.</p></li>

<li><p>Let <var>ancestor</var> be <var>selectedoption</var>'s <span>parent</span>.</p></li>

<li>
<p><span>While</span> <var>firstAncestorSelect</var> is null and <var>ancestor</var> is not
null:</p>

<ol>
<li><p>If <var>ancestor</var> is a <code>select</code> element, then set
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<var>firstAncestorSelect</var> to <var>ancestor</var>.</p></li>

<li><p>Set <var>ancestor</var> to <var>ancestor</var>'s <span>parent</span>.</p></li>
</ol>
</li>

<li><p>If <var>firstAncestorSelect</var> is null, then return.</p></li>

<li><p><span data-x="list append">Append</span> <var>selectedoption</var> to
<var>firstAncestorSelect</var>'s <span>select descendant selectedoption elements</span>.</p></li>

<li><p>Run <span>clone an option into a selectedoption</span> given the first <code>option</code>
in <var>firstAncestorSelect</var>'s <span data-x="concept-select-option-list">list of
options</span> whose <span data-x="concept-option-selectedness">selectedness</span> is true and
<var>insertedNode</var>.</p></li>
</ol>

<p>The <code>selectedoption</code> <span>HTML element removing steps</span>, given
<var>selectedoption</var> and <var>oldParent</var>, are:</p>

<ol>
<li>
<p>For each <var>ancestor</var> of <var>selectedoption</var>'s <span
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data-x="ancestor">ancestors</span>:</p>

<ol>
<li><p>If <var>ancestor</var> is a <code>select</code> element, then return.</p></li>
</ol>
</li>

<li>
<p>For each <var>ancestor</var> of <var>oldParent</var>'s <span data-x="inclusive
ancestor">inclusive ancestors</span>:</p>

<ol>
<li>
<p>If <var>ancestor</var> is a <code>select</code> element, then:</p>

<ol>
<li><p><span data-x="list remove">remove</span> <var>selectedoption</var> from
<var>ancestor</var>'s <span>select descendant selectedoption elements</span>.</p></li>

<li><p>Run <span>clone an option into a selectedoption</span> given null and
<var>selectedoption</var>.</p></li>

<li><p>Return.</p></li>
</ol>
</li>
</ol>
</li>
</ol>

<p>The following <span data-x="concept-element-attributes-change-ext">attribute change
steps</span>, given <var>element</var>, <var>localName</var>, <var>oldValue</var>,
<var>value</var>, and <var>namespace</var> are used for all <span>HTML elements</span> in order to
support <code>selectedoption</code> elements:</p>

<ol>
<li><p>Run <span>maybe clone option into selectedoption</span> given <var>element</var>.</p></li>
</ol>



<h4 split-filename="form-control-infrastructure">Form control infrastructure</h4>
Expand Down Expand Up @@ -139697,6 +139902,16 @@ interface <dfn interface>External</dfn> {
<td><code>HTMLSelectElement</code></td>
</tr>

<tr>
<th><code>selectedoption</code></th>
<td>Mirrors content from an <code>option</code></td>
<td>none</td>
<td><code>button</code></td>
<td>empty</td>
<td><span data-x="global attributes">globals</span></td>
<td><code>HTMLSelectedOptionElement</code></td>
</tr>

<tr>
<th><code>slot</code></th>
<td>Shadow tree slot</td>
Expand Down Expand Up @@ -142482,6 +142697,10 @@ interface <dfn interface>External</dfn> {
<td> <code>select</code>
<td> <code>HTMLSelectElement</code> : <code>HTMLElement</code>

<tr>
<td> <code>selectedoption</code>
<td> <code>HTMLSelectedOptionelement</code> : <code>HTMLElement</code>

<tr>
<td> <code>slot</code>
<td> <code>HTMLSlotElement</code> : <code>HTMLElement</code>
Expand Down