Base UI: Autocomplete Component for React

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Documentation for the @base-ui/react Autocomplete component. It provides search and suggestion capabilities during text input, supports asynchronous loading, and explicitly distinguishes itself from combobox controls.

Key points

  1. Supports free-form text entry with optional suggestions, distinct from strict combobox selections.
  2. Modular component anatomy covering Root, Input, Popup, List, Item, Empty, Status, and Positioner.
  3. Handles asynchronous data fetching with React Transitions and AbortController integration.
  4. Provides utility hooks such as useFilter and useFilteredItems for custom filtering logic.
  5. Requires accessible naming through native label elements or dedicated Field components.

Why it matters

Design systems require flexible, accessible search inputs. Base UI provides unstyled primitives that enforce proper accessibility semantics while distinguishing between open text input and strict selection.

Analysis

The distinction between an Autocomplete and a Combobox is often blurred in UI libraries. Base UI clarifies that Autocomplete is intended for free-form inputs with optional suggestions or command pickers, whereas Combobox enforces a rigid selection. The asynchronous example illustrates robust modern React patterns, combining AbortController for stale-request cancellation with React Transitions for non-blocking UI updates.

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Summary generated by AI (Gemini 3.8 Flash, 29 September 2026). It may contain errors – the original source is authoritative.

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