downshift-js/downshift

useCombobox appears to be incompatible with react compiler

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#1646 opened on May 7, 2025

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help wantedneeds discussionneeds investigation

Description

If I try and type in an input on combobox then the value does not update. If I add 'use no memo'; to the file to opt out then it works as expected.

I have created a minimal reproduction: https://stackblitz.com/edit/vitejs-vite-jzpospa2?file=src%2FApp.jsx

Contributor guide

Tech stack
javascriptreact
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
ReactJavaScriptReact hooks
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the useCombobox hook implementation in the downshift source code, particularly where memoization or hooks are used that may conflict with the React compiler. Refer to the provided StackBlitz reproduction at https://stackblitz.com/edit/vitejs vite jzpospa2?file=src%2FApp.jsx. Look for patterns like useMemo, useCallback, or state updates that are not properly handled by the compiler. Compare with the workaround of adding 'use no memo'. Consider submitting a fix that makes the hook compatible or documents the limitation.