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[css-forms-1] Improve slider UA styles #12427

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[css-forms-1] Improve slider UA styles #12427

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35 changes: 33 additions & 2 deletions css-forms-1/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -813,11 +813,31 @@ select {

## Sliders ## {#stylesheet-sliders}

ISSUE: Refine meter, progress, switch and range input styling.
ISSUE(12267): Refine meter, progress, switch and range input styling.

```css
input:is([type=checkbox][switch], [type=range]) {
display: inline-flex;
position: relative;
align-items: center;
width: 100%;
}

input[type=checkbox][switch] {
width: 2em;
}

::slider-track {
height: 1em;
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Probably need some thought on how to meet WCAG target sizing here. Same goes for existing checkbox styling I believe.
width: 100%;
}

input[type=range]::slider-track {
height: 0.5em;
}

input[type=checkbox][switch]::slider-track {
border-radius: 1em;
}

::slider-fill {
Expand All @@ -829,13 +849,24 @@ ISSUE: Refine meter, progress, switch and range input styling.
inline-size: 0;
}

input[type=checkbox][switch]::slider-fill {
background-color: transparent;
border-radius: inherit;
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Not really sure if this should be needed, for my range input prototype it isn't but for switch it seems to be else the fill overflows the track.

We can adjust accordingly in future if it's not needed.
}

::slider-thumb {
border-radius: 0;
border: none;
background-color: currentColor;
appearance: none;
width: 1em;
height: 100%;
height: 1em;
border-radius: 100%;
position: absolute;
}

input[type=checkbox][switch]:checked::slider-thumb {
inset-inline-end: 0;
}
```

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