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Add UA stylesheet for <select> base appearance #10670

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Add UA stylesheet for <select> base appearance #10670

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Expand Up @@ -3953,6 +3953,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#widget">widget</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#native-appearance">native appearance</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#primitive-appearance">primitive appearance</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#base-appearance">base appearance</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#element-with-default-preferred-size">element with default preferred size</dfn></li>
<li>The <dfn data-x-href="https://drafts.csswg.org/css-ui/#non-devolvable">non-devolvable widget</dfn> and
<dfn data-x-href="https://drafts.csswg.org/css-ui/#devolvable">devolvable widget</dfn> classification, and the related
Expand Down Expand Up @@ -135710,6 +135711,93 @@ progress { appearance: auto; }</code></pre>

</div>

<!-- TODO should this go at the top of the section right below "the select element"? -->
<p>The following styles are expected to apply to <code>select</code> elements when they are being
rendered as a <span>drop-down box</span> with <span>base appearance</span>:</p>
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Where do we define what base computes to when it's a list box?

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In this iteration I'm not proposing supporting base appearance on list box rendering. In chromium, I am making it do the same thing as appearance:auto, and our plan to do forward compat is to add a CSS @supports rule when appearance:base is ready for list box rendering.


<pre><code class="css">@namespace "http://www.w3.org/1999/xhtml";

select {
border: 1px solid currentColor;
background-color: color-mix(in lab, currentColor 10%, transparent);
color: inherit;
font: inherit;
padding: 0.25em .5em;
text-box: trim-both;

border-radius: 0.25em;
display: inline-block;
box-sizing: border-box;
min-block-size: max(24px, 1.2em);
min-inline-size: 24px;
white-space: normal;
}

select:enabled:hover {
background-color: color-mix(in lab, currentColor 20%, transparent);
}

select:enabled:active {
background-color: color-mix(in lab, currentColor 30%, transparent);
}

select::picker(select) {
box-sizing: border-box;
overflow: auto;
border: 1px solid rgba(0, 0, 0, 0.15);
border-radius: 0.25em;
padding-block: 0.25em;
padding-inline: 0;
background-color: Field;
margin: 0;
inset: auto;
min-inline-size: anchor-size(self-inline);
min-block-size: 1lh;
position-area: block-end span-inline-end;
position-try-fallbacks:
block-start span-inline-end,
block-end span-inline-start,
block-start span-inline-start;
}

select option {
min-inline-size: 24px;
min-block-size: 24px;
align-content: center;
display: block;
padding-block-start: 0;
padding-block-end: 1px;
padding-inline: 2px;
white-space: nowrap;
}

select option:hover {
background-color: SelectedItem;
color: SelectedItemText;
}

select option::check {
content: '\2713' / '';
}
select option:not(:checked)::check {
visibility: hidden;
}

select::select-arrow {
padding-inline-start: 0.5em;
display: block;
content: counter(fake-counter-name, disclosure-open);
}

select optgroup {
padding-inline: 2px;
}

select optgroup option {
padding-inline-start: 20px;
}</code></pre>



<div w-nodev>

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