Proof

rn-fetch-blob

published package JS runs unchanged over RNFetchBlob. the module shares the react-native-blob-util file store. directory constants are copied onto the module because fs.js reads them at import time. progress, state, and read-stream events use the RNFetchBlob names on RCTDeviceEventEmitter.
85%
API coverage
No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.
Working (10)
fetchBlobfetchBlobFormprogress and state eventsfs create/read/write/hash/stat/stream/slicedirectory constantspathForAppGroup rejectionsyncPathAppGroup empty stringpreviewDocument resolveopenDocument document-not-supported rejectionemitExpiredEvent
Missing
app-group containers, UIDocumentInteractionController, the expired-task table, Android ACTION_VIEW, GET_CONTENT, DownloadManager, and media scanner