Docs: Make theme switcher accessible #37780
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* set an explicit `aria-label` to the switcher (as the `<span>` is not sufficient, as it can be display:none'd and then the button has no accName) * make the theme buttons actual `aria-pressed` toggles
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this way, if the text ever gets changed in the html, this will adapt appropriately
patrickhlauke
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This was referenced Jan 2, 2023
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This commit mirrors twbs/bootstrap#37780 with ~~a small fix~~ a fix from twbs/bootstrap#37836 and adds the missing checkmark icon to the theme dropdown.
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Description
aria-labelto the switcher (as the<span>is not sufficient, as it can be display:none'd and then the button has no accName); also include the currently selected theme namearia-pressedtoggles, so the currently active one is explicitly announcedMotivation & Context
Make sure our docs controls are accessible. Surprised this was pushed to live in the current state.
Video (using Chrome/NVDA) showing the current state, and the fixed version with this PR applied
bootstrap-theme-switcher.mp4
Note how in the current state, the button (when the text is not visible) lacks an accessible name (just announced as "button"), the currently selected theme button is not identified by screen readers, and once choosing a theme, focus is just lost/rugpulled.
Type of changes
Checklist
npm run lint)Live previews
https://deploy-preview-37780--twbs-bootstrap.netlify.app/