fix(Slider): forward aria attributes to the thumb - #6848
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Merging this PR will improve performance by 10.78%
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1.9 ms | 1.8 ms | +10.78% |
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Comparing J-Michalek:fix/slider-thumb-aria-label (b56f385) with v4 (07f3fe8)
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📝 WalkthroughWalkthroughSlider routes ARIA attributes based on thumb count. Single-thumb sliders receive caller-provided labels or a default Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The slider now forwards accessibility attributes, but multi-thumb value text may not reach each focusable thumb and FormField descriptions may replace caller-provided descriptions. These can cause incomplete announcements or lost help/error associations, so the change is mergeable with explicit owner follow-up. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@docs/content/docs/2.components/slider.md`:
- Around line 39-41: Update the Slider accessibility tip to distinguish naming
behavior by thumb count: two-thumb sliders receive “Minimum” and “Maximum”
labels, while sliders with three or more thumbs receive “Value n of m” labels.
Preserve the guidance that aria-label or aria-labelledby is needed for a single
thumb without a visible label.
In `@src/runtime/components/Slider.vue`:
- Around line 105-119: Update the Slider render path using rootAttrs and
thumbAttrs so fallthrough attributes are filtered from the current attrs during
each render rather than relying on cached computed values from useAttrs().
Preserve the existing aria-label fallback behavior, and add a regression test
that changes aria-label after mount and verifies the thumb receives the updated
value.
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docs/content/docs/2.components/slider.mdsrc/runtime/components/Slider.vuetest/components/Slider.spec.ts
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The thumb is the element rendered with `role="slider"`, so route consumer `aria-*` attributes there instead of the root, which is neither focusable nor labelable. Dropping the hardcoded label also restores Reka UI's own `Minimum`/`Maximum` and `Value n of m` names for multi-thumb sliders, and lets `aria-valuetext` through. A single unnamed thumb still falls back to `Thumb` so it is never left nameless. Closes nuxt#6782
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Reka UI names the thumbs of a range slider by their position, `Minimum` / `Maximum` for two and `Value n of m` for three or more. Forwarding one `aria-label` to every thumb replaced those with the same string, leaving the thumbs indistinguishable. Only a single thumb now takes the consumer `aria-*` attributes. A label that the thumbs do not take stays on the root, which is given a `group` role so the name is actually exposed, `aria-label` on a roleless element being ignored when the accessible name is computed.
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Inline comments:
In `@src/runtime/components/Slider.vue`:
- Around line 108-110: Update the multi-thumb path in the Slider component so
each focusable SliderThumb receives its corresponding caller-provided
aria-valuetext rather than leaving it only on SliderRoot; define the per-thumb
value contract, bind each value to the matching thumb, and add a regression test
covering multiple thumbs.
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@benjamincanac I made some changes so that multiple thumbs don't receive the same |
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Inline comments:
In `@src/runtime/components/Slider.vue`:
- Line 108: Update the single-thumb slider attribute forwarding around
thumbAttrs so every caller-provided aria- attribute, including aria-invalid and
aria-errormessage, is applied to the focusable element with role="slider" rather
than the root. Preserve existing handling for other attributes and add
regression coverage for an ARIA attribute outside the current allowlist.
- Line 151: Update the SliderThumb attribute assembly to merge caller and
FormField aria-describedby ID lists, de-duplicating IDs instead of allowing
ariaAttrs to overwrite the caller value. Preserve FormField ownership of
aria-invalid and add coverage for both description sources being present.
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src/runtime/components/Slider.vuetest/components/Slider.spec.ts
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| v-bind="(typeof props.tooltip === 'object' ? props.tooltip : {})" | ||
| > | ||
| <SliderThumb data-slot="thumb" :class="ui.thumb({ class: props.ui?.thumb })" :aria-label="thumbs === 1 ? 'Thumb' : `Thumb ${thumb} of ${thumbs}`" v-bind="ariaAttrs" /> | ||
| <SliderThumb data-slot="thumb" :class="ui.thumb({ class: props.ui?.thumb })" v-bind="{ ...(thumbs === 1 ? pick($attrs, thumbAttrs) : {}), ...ariaAttrs }" :aria-label="thumbs > 1 || $attrs['aria-labelledby'] ? undefined : ($attrs['aria-label'] ?? 'Thumb')" /> |
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🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win
Merge aria-describedby values from the caller and FormField.
...ariaAttrs overwrites the caller value that pick($attrs, thumbAttrs) adds. A custom description is lost when FormField also provides a hint, help text, or error description.
Concatenate and de-duplicate both ID lists. Keep FormField control of aria-invalid. Add a test with both description sources.
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In `@src/runtime/components/Slider.vue` at line 151, Update the SliderThumb
attribute assembly to merge caller and FormField aria-describedby ID lists,
de-duplicating IDs instead of allowing ariaAttrs to overwrite the caller value.
Preserve FormField ownership of aria-invalid and add coverage for both
description sources being present.
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Inline comments:
In `@test/components/Slider.spec.ts`:
- Around line 118-124: Update the test “forwards validity attributes to the
thumb” to also assert that the root element’s aria-errormessage attribute is
undefined, while preserving the existing thumb assertions and root aria-invalid
check.
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Thank you for resolving my issue! |
3 participants
🔗 Linked issue
Resolves #6782
❓ Type of change
📚 Description
Sliderset a staticaria-labelon the thumb:The thumb is the element Reka UI renders with
role="slider", so that string is the slider's accessible name, and it could not be replaced.aria-labelon<USlider>fell through toSliderRoot— a<span>with no role that is never announced — and theuiprop only accepts classes. Three consequences, all described in #6782:SliderThumbImplresolves$attrs['aria-label'] || getLabel(...), andgetLabel()yieldsMinimum/Maximumfor two thumbs andValue n of mfor three or more. The hardcoded string overrode all of them, so a price filter announced "Thumb 1 of 2" instead of "Minimum".aria-valuetextcould not be supplied, so sliders with units announced a bare number.This PR sets
inheritAttrs: falseand splits$attrsby prefix:aria-*goes to the thumb, everything else stays on the root. The hardcoded label is gone, so Reka UI's multi-thumb names come back on their own.Thumbis kept only as a fallback for a single thumb that has neitheraria-labelnoraria-labelledby, so #5313's nameless-slider case doesn't regress.No new API surface, and no change for anyone not passing
aria-*.Rendered output changes
aria-label="Volume"ThumbVolumeThumbThumb(unchanged)Thumb 1 of 2/Thumb 2 of 2Minimum/MaximumThumb n of 3Value n of 3aria-valuetextNo props or emits change, but the rendered DOM does: consumer
aria-*attributes no longer appear on[data-slot="root"]. Selectors written against them would need updating — flagging it in case you'd rather label this differently.🧪 Testing
ariablock totest/components/Slider.spec.tscoveringaria-label,aria-labelledby(fallback stands down so the accname resolves through the reference), the unnamed fallback, two- and three-thumb defaults,aria-valuetext, and non-aria attributes staying on the root. Six existing snapshots updated to reflect the table above.Speed,Volume(viaaria-labelledby),Delay,Price rangeon both thumbs, andMinimum/Maximum/Value n of 3on the unlabelled multi-thumb examples.getByRole('slider', { name })resolves for each, which is the voice-control path the issue reported as broken. Thetooltipbranch is covered too, since the hardcoded label was duplicated across both branches.📝 Checklist
Note
This touches the same two
SliderThumblines as #6768, which movesuseFormField'sariaAttrsonto the thumb. The two changes compose — that PR handles form attributes, this one handles consumer attributes — but whichever lands second will need a trivial rebase. Worth checking the merge order of the twov-binds at that point so a consumeraria-describedbycan't shadow the form's error association.