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[css-forms-1] Add 24px sizing rule for checkbox and radio inputs #12489

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[css-forms-1] Add 24px sizing rule for checkbox and radio inputs #12489

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10 changes: 8 additions & 2 deletions css-forms-1/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -843,8 +843,14 @@ ISSUE: Refine meter, progress, switch and range input styling.

```css
input:is([type=checkbox]:not([switch]), [type=radio]) {
width: 1em;
height: 1em;
/* These size rules ensure accessibility by following WCAG rules:
* https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html */
block-size: max(1em, 24px);
inline-size: max(1em, 24px);

/* This font-size rule ensures the checkmark fills the containing box. */
font-size: max(1em, 24px);

Comment on lines +846 to +853
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@nt1m nt1m Jul 16, 2025 •
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font-size would control both block-size and inline-size technically, so this would have the same effect.

    block-size: 1em;
    inline-size: 1em;
    font-size: max(1em, 24px);

cc @fantasai to look at this

display: inline-flex;
align-items: center;
justify-content: center;
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