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Add attribute changed steps to dialog element #10954

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Add attribute changed steps to dialog element #10954

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c85fb47
Add attribute changed steps to dialog element
lukewarlow Jan 27, 2025
376c837
Replace assert in set the dialog close watcher with an early return
lukewarlow Feb 2, 2025
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Original file line number Diff line number Diff line change
Expand Up @@ -62084,6 +62084,38 @@ interface <dfn interface>HTMLDialogElement</dfn> : <span>HTMLElement</span> {
<var>removedNode</var>'s <span>node document</span>'s <span>open dialogs list</span>.</p></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 <code>dialog</code> elements:</p>

<ol>
<li><p>If <var>namespace</var> is not null, then return.</p></li>

<li><p>If <var>localName</var> is not <code data-x="attr-dialog-open">open</code>, then
return.</p></li>

<li><p>If <var>value</var> is null:</p>

<ol>
<li><p><span data-x="list remove">Remove</span> <var>element</var> from <var>element</var>'s
<span>node document</span>'s <span>open dialogs list</span>.</p></li>

<li>
<p>If <var>element</var>'s <span data-x="dialog-close-watcher">close watcher</span> is not
null, then:</p>

<ol>
<li><p><span data-x="close-watcher-destroy">Destroy</span> <var>element</var>'s <span
data-x="dialog-close-watcher">close watcher</span>.</p></li>

<li><p>Set <var>element</var>'s <span data-x="dialog-close-watcher">close watcher</span> to
null.</p></li>
</ol>
</li>
</ol>
</li>
</ol>

<p>To <dfn>show a modal dialog</dfn> given a <code>dialog</code> element <var>subject</var>:</p>

<ol>
Expand Down Expand Up @@ -62178,6 +62210,9 @@ interface <dfn interface>HTMLDialogElement</dfn> : <span>HTMLElement</span> {
element <var>dialog</var>:</p>

<ol>
<li><p>If <span>dialog</span>'s <span data-x="dialog-close-watcher">close watcher</span> is not
null, then return.</p></li>

<li>
<p>Set <var>dialog</var>'s <span data-x="dialog-close-watcher">close watcher</span> to the
result of <span data-x="establish a close watcher">establishing a close watcher</span> given
Expand Down