feat(core): useAnnounce live-region hook + Typeahead announcements (comboboxes-6)#3382
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useAnnounce speaks messages to screen readers through persistently-mounted polite/assertive live regions created once (not born-with-content), so announcements are reliable. Wired into BaseTypeahead to announce result counts and no-results during search (comboboxes-6), which were previously silent.
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PR Analysis Report📚 Storybook PreviewView Storybook for this PR 🧪 Sandbox PreviewView Sandbox for this PR No new or modified components detected. Bundle Size Summary
Accessibility AuditStatus: No accessibility violations detected. Generated by PR Enrichment workflow | Storybook | Sandbox | View full report |
josephfarina
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Part of the accessibility & keyboard-management program (#3343). Adds the live-region primitive the announcement findings need, and closes the core of
comboboxes-6for Typeahead.Problem
The audit found the entire search/combobox domain has no working live region — result counts, "No results found", loading, and token/multiselect changes are all silent to screen readers. The one existing
aria-livespan inBaseTypeaheadis mounted together with its content, which most assistive tech will not announce (a live region must exist before its content changes).What this adds
useAnnounce()— an imperative hook returningannounce(message, politeness?):role="status"/aria-live="polite"androle="alert"/aria-live="assertive", botharia-atomic) appended todocument.bodyonce, empty, on first use. Because they are not born with content, updates are announced reliably.announce('')clears a lingering status (e.g. when a search query is cleared) instead of announcing nothing.document); regions self-reattach if removed.Wired into Typeahead (comboboxes-6)
BaseTypeaheadnow announces the outcome of each active search —"N results"/"1 result"/ theemptySearchResultsText("No results found") — and clears the announcement when the query is cleared. Previously silent.Tests
useAnnounce.test.tsx(6): regions mount empty on first announce with correct ARIA; polite vs assertive routing; identical-message re-announce; empty-message clear; empty-message no-op before first use; singleton reuse across hook instances.Typeahead.test.tsx(+2): announces a result count; announces "no results found".Typecheck, lint, and the full useAnnounce + Typeahead suites are green (35 tests).
Follow-up
Wire
useAnnounceinto the remaining silent surfaces (Selector/MultiSelector empty + select-all, Tokenizer add/remove, FileInput selection, Pagination/Calendar/Lightbox index changes) — tracked under #3343.