feat(web): add typeahead keyboard selection to Select (Alpha) - #870
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feat(web): add typeahead keyboard selection to Select (Alpha)#870adrienzheng-cb wants to merge 2 commits into
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The web Select (Alpha) previously only matched the first letter of an option and only when opening the listbox. Add native <select>-style typeahead: a multi-character search buffer that resets ~500ms after the last keystroke, repeated-key cycling through options that share a first letter, and matching that works both when the listbox is open and closed. Buffer/matching logic is extracted into a pure typeahead module with focused unit tests. Refs CDS-2505 Co-authored-by: Cursor <cursoragent@cursor.com>
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Unify the closed- and open-state key guards behind a shared isTypeaheadKeyEvent helper and reduce comments to intent-only. Co-authored-by: Cursor <cursoragent@cursor.com>
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What changed? Why?
Adds native
<select>-style typeahead keyboard selection to the webSelect (Alpha):<select>semantics.keydownlistener so keystrokes are handled consistently even after focus moves into the portaled dropdown.typeahead.tsmodule (isPrintableTypeaheadKey,normalizeOptionText,getTypeaheadMatchIndex) with focused unit tests.The previous implementation only matched the first letter of an option and only at open time, so users could not type multiple characters or cycle between same-prefixed options.
Testing
How has it been tested?
Testing instructions
Focus a web
Select (Alpha)and type characters: with the listbox closed, typing opens it and focuses the first match; with it open, continue typing to refine the prefix match, or repeat a single letter to cycle through same-prefixed options. Seetypeahead.test.tsfor the pure matching logic and the addedSelect.test.tsxcases for integration behavior.Linear: https://linear.app/coinbase/issue/CDS-2505
Change management
type=routine
risk=low
impact=sev5
automerge=false
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