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[css-pseudo-4] Add ::details-content pseudo-element. #10379

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May 30, 2024
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[css-pseudo-4] Add ::details-content pseudo-element. #10379

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27 changes: 27 additions & 0 deletions css-pseudo-4/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -1310,6 +1310,33 @@ File Selector Button: the ''::file-selector-button'' pseudo-element</h3>
<pre class="lang-css">::file-selector-button { border: 3px solid green }</pre>
</div>

<h3 id="details-content-pseudo">
Expandable contents of details element: the ''::details-content'' pseudo-element</h3>

The <dfn>::details-content</dfn> pseudo-element targets
the additional information in a a <{details}> element
that can be expanded or collapsed.
It is a [=part-like pseudo-element=].

There is no restriction on which properties apply to the
''::details-content'' pseudo-element.

<div class="example" id="details-content-example">
For example, the following example would
animate the opacity of the additional information
when the <{details}> element opens:

<pre class="lang-css">details::details-content {
opacity: 0;
transition: content-visibility 300ms allow-discrete step-end, opacity 300ms;
}

details[open]::details-content {
opacity: 1;
transition: content-visibility 300ms allow-discrete step-start, opacity 300ms;
}</pre>
</div>

<h2 id="interactions">
Overlapping Pseudo-element Interactions</h2>

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