facebookexperimental/Recoil

[React Native] "set" functions don't properly update the state on React Native release builds

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#1068 opened on Jun 13, 2021

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 (1 comment) (0 reactions) (1 assignee)JavaScript (19,428 stars) (1,151 forks)batch import
help wantednative

Description

Using RN 0.64 and Recoil 0.3.1 This code works perfectly in debug mode, but the "setUser" function doesn't do its job on release builds. Using selectors, or simply getting the state from the atom, using useRecoilValue or useRecoilState... nothing works. The app has no specific behavior defined in debug or release mode. So the results should be rigorously the same. image setUser is defined here: image

image

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Contributor guide

Tech stack
javascriptreactreact native
Domain
mobile
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
React Native development environmentUnderstanding of Recoil basicsDebug vs release build knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
The issue reports that set functions in Recoil do not update state in React Native release builds. To reproduce, check the provided screenshots for the atom and setUser function. Investigate whether the issue is related to babel plugins, Hermes engine, or JS bundling. Since there is an assignee, confirm if they have a fix in progress. No linked PRs.