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[css-forms-1] Add UA styles for listbox select elements #12511

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[css-forms-1] Add UA styles for listbox select elements #12511

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18 changes: 13 additions & 5 deletions css-forms-1/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -870,14 +870,14 @@ input[type=radio]:checked::checkmark {
## Selects & buttons ## {#stylesheet-select-button}

```css
select {
select:has-picker {
/* Base appearance select always sizes based on its contents. */
field-sizing: content !important;
}

button,
::file-selector-button,
select,
select:has-picker,
input:is([type="color"], [type="button"], [type="reset"], [type="submit"]) {
border: 1px solid currentColor;
background-color: transparent;
Expand Down Expand Up @@ -913,19 +913,27 @@ input:is([type="color"], [type="button"], [type="reset"], [type="submit"]) {
text-align: initial;
text-indent: initial;
}
:is(button, select, input:is([type="color"], [type="button"], [type="reset"], [type="submit"])):enabled:hover,
:is(button, select:has-picker, input:is([type="color"], [type="button"], [type="reset"], [type="submit"])):enabled:hover,
:enabled::file-selector-button:hover {
background-color: color-mix(in lab, currentColor 10%, transparent);
}
:is(button, select, input:is([type="color"], [type="button"], [type="reset"], [type="submit"])):enabled:active,
:is(button, select:has-picker, input:is([type="color"], [type="button"], [type="reset"], [type="submit"])):enabled:active,
:enabled::file-selector-button:active {
background-color: color-mix(in lab, currentColor 20%, transparent);
}
:is(button, select, input:is([type="color"], [type="button"], [type="reset"], [type="submit"])):disabled,
:is(button, select:has-picker, input:is([type="color"], [type="button"], [type="reset"], [type="submit"])):disabled,
:disabled::file-selector-button {
color: color-mix(in srgb, currentColor 50%, transparent);
}

select:not(:has-picker) {
display: inline-block;
overflow-block: auto;
overflow-inline: auto;
border: 1px solid currentColor;
user-select: none;
}

select > button:first-child {
/* Prevents button from setting font, color, or background-color */
all: unset;
Expand Down