What features must an autocomplete have in a machine coding interview?
Input with suggestions list, debounce (300ms), fetch/filter suggestions, render dropdown, click to select, and click outside to close. These are the minimum. Keyboard navigation and highlighting are strong bonuses.
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More FAQs in Autocomplete Search Bar: Complete Interview Checklist
Core (input, debounce 300ms, fetch, render, select, click-outside), advanced (keyboard nav, highlight, loading, no-results, caching, AbortController), accessibility (ARIA combobox/option), CSS (absolute, hover, highlighted, scroll), and testing (typing, debounce, keys, enter, escape, click-outside, no results, empty).
Keyboard navigation (arrow keys, enter, escape), highlight matching text, loading state, no results state, caching (Map), and AbortController for cancelling previous requests. These show depth and production-readiness.
Test typing (shows suggestions), debounce (delays fetch), arrow keys (navigate), Enter (selects), Escape (closes), click outside (closes), no results (shows message), and empty input (clears suggestions). Test each feature and edge case.
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