fix(components): [autocomplete] aria-activedescendant tracks highlight by it3xl-cloudblue · Pull Request #24939 · element-plus/element-plus

it3xl-cloudblue · 2026-09-30T05:41:56Z

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aria-activedescendant on the input now follows highlightedIndex: it names the highlighted option and is removed while none is highlighted. The input no longer fails WCAG 2.2 success criterion 4.1.2 Name, Role, Value: axe-core reports aria-valid-attr-value on it before the change and not after.

It was set on mount to <listbox-id>-item--1, which matches no element, and updated only on keyboard navigation. So it kept naming an option after a selection or after ArrowUp left the first option with loop-navigation off, and stayed on -1 with highlight-first-item.

Six tests in a new aria-activedescendant block; five fail without the change.

The nested listbox is fixed separately in #24940.

Summary by CodeRabbit

Accessibility Improvements
- The autocomplete input now keeps its active suggestion reference in sync with the highlighted option, including when the first option is highlighted automatically. The reference is cleared when there are no suggestions, the highlight moves outside the list, or an option is selected. This ensures assistive technologies receive an accurate indication of the currently active suggestion.

aria-activedescendant now names the highlighted option and is removed while none is highlighted, so the input no longer fails WCAG 2.2 success criterion 4.1.2 Name, Role, Value (axe: aria-valid-attr-value). It was set on mount to <listbox-id>-item--1, an id no element has, and updated only on keyboard navigation. So it kept naming an option after a selection or after ArrowUp left the first option with loop-navigation off, and stayed on -1 with highlight-first-item.

chatgpt-codex-connector · 2026-09-30T05:42:00Z

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pull-request-triage · 2026-09-30T05:42:01Z

👋 @it3xl-cloudblue, seems like this is your first time contribution to element-plus.
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github-actions · 2026-09-30T05:42:03Z

coderabbitai · 2026-09-30T05:42:13Z

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📒 Files selected for processing (2)

packages/components/autocomplete/__tests__/autocomplete.test.tsx
packages/components/autocomplete/src/autocomplete.vue

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packages/components/autocomplete/tests/autocomplete.test.tsx
packages/components/autocomplete/src/autocomplete.vue

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📝 Walkthrough

Walkthrough

The autocomplete input now updates aria-activedescendant when the highlighted index or suggestions change. Tests cover highlighted and unhighlighted options, automatic first-item highlighting, and selection.

Changes

Autocomplete accessibility

Layer / File(s)	Summary
Synchronize active descendant with highlight `packages/components/autocomplete/src/autocomplete.vue`, `packages/components/autocomplete/__tests__/autocomplete.test.tsx`	A watcher sets `aria-activedescendant` to the highlighted suggestion’s ID when the index is within the suggestions list. Otherwise, it removes the attribute. Tests cover empty suggestions, an off-list highlight, automatic first-item highlighting, and selection.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 4a5ef

The change aligns the active descendant with highlighted suggestions and removes invalid references. No actionable risk introduced by this PR remains; it is mergeable subject to normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the Autocomplete accessibility fix: aria-activedescendant now tracks the highlighted option.
Description check	✅ Passed	The description includes all template sections, provides a clear technical summary, explains the accessibility impact, describes the tests, and references the related issue.

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Inline comments:
Review comments at @packages/components/autocomplete/src/autocomplete.vue:
- Line 476: Update the active-descendant watcher around the highlightedIndex
check to set the attribute only when the index is within the current
suggestions; otherwise remove it. Ensure suggestion changes retrigger this
validation so an empty response clears the attribute even if highlightedIndex
remains 0, and add a regression test for an initially empty response with
highlightFirstItem enabled.

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packages/components/autocomplete/__tests__/autocomplete.test.tsx
packages/components/autocomplete/src/autocomplete.vue

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aria-activedescendant is set only while the highlighted index names an existing option. With highlight-first-item, an empty response set the index to 0 and the attribute to an option that was not rendered.

pull-request-triage Bot assigned it3xl-cloudblue Sep 30, 2026

pull-request-triage Bot added 1st contribution Their very first contribution Needs Review labels Sep 30, 2026

github-actions Bot added the Contribution::Community label Sep 30, 2026

it3xl-cloudblue mentioned this pull request Sep 30, 2026

fix(components): [autocomplete] remove the nested listbox #24940

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Comment thread packages/components/autocomplete/src/autocomplete.vue Outdated

fix(components): [autocomplete] no active descendant without options

4a5ef1e

aria-activedescendant is set only while the highlighted index names an existing option. With highlight-first-item, an empty response set the index to 0 and the attribute to an option that was not rendered.

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fix(components): [autocomplete] aria-activedescendant tracks highlight - #24939

fix(components): [autocomplete] aria-activedescendant tracks highlight#24939
it3xl-cloudblue wants to merge 2 commits into
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it3xl-cloudblue:fix/autocomplete-active-descendant

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it3xl-cloudblue commented Sep 30, 2026 •

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