itinance/react-native-fs

React-native fs stops other async functions to execute until the file downloads

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#251 opened on Feb 9, 2017

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 (27 comments) (1 reaction) (0 assignees)C# (4,629 stars) (919 forks)batch import
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Description

I am using react-native fs to download the file. The react-native fs uses promises, so until the promise is returned back it keeps other async functions in a queue to execute. For instance, If i start downloading a file then other async functions(such as getting data from local storage) gets blocked. The other async function starts executing only when the download is complete.

any help would be appreciated.

Contributor guide

Tech stack
react nativejavascript
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.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
React Native basicsJavaScript promisesreact native fs knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
This issue reports that using react native fs for file downloads blocks other async operations in React Native. The problem likely stems from the native module's implementation running on the main thread or not using proper background threading. To investigate, review the native download code in RNFSManager (iOS/Android) and the JavaScript wrapper. Check the 27 comments for any identified workarounds or patches. Additionally, consider if the issue can be resolved by moving the download to a background thread or using a different API like fetch with streaming.