What's changing: In the JS SDK v2 pre-release, uploading, downloading, uploadError, and downloadError move from the dataFlowStatus sub-object on SyncStatus to the main SyncStatus interface, aligning the JavaScript SDK with other PowerSync SDKs. The SyncDataFlowStatus getters are preserved as deprecated members for backward compatibility.
High priority — existing docs are now inaccurate or incomplete
- Production Readiness Best Practices Guide (
https://docs.powersync.com/maintenance-ops/production-readiness-guide) — the "SDK Diagnostics" section states that uploading "can be found on the dataFlowStatus object" and downloading "can be found on the dataFlowStatus object." The Client Logging section contains TypeScript code examples using status.dataFlowStatus?.downloadError and status.dataFlowStatus?.uploadError. In v2, these fields live directly on SyncStatus; accessing them via dataFlowStatus is the deprecated path.
For reviewer consideration — may be worth documenting
None.
Source PR: powersync-ja/powersync-js#999 — merged to the v2 pre-release branch on 2026-06-22.
Filed automatically by Claude Code (claude-sonnet-4-6). A human must verify the scope, prepare the docs PR, and publish it only once this update has been released.
What's changing: In the JS SDK v2 pre-release,
uploading,downloading,uploadError, anddownloadErrormove from thedataFlowStatussub-object onSyncStatusto the mainSyncStatusinterface, aligning the JavaScript SDK with other PowerSync SDKs. TheSyncDataFlowStatusgetters are preserved as deprecated members for backward compatibility.High priority — existing docs are now inaccurate or incomplete
https://docs.powersync.com/maintenance-ops/production-readiness-guide) — the "SDK Diagnostics" section states thatuploading"can be found on thedataFlowStatusobject" anddownloading"can be found on thedataFlowStatusobject." The Client Logging section contains TypeScript code examples usingstatus.dataFlowStatus?.downloadErrorandstatus.dataFlowStatus?.uploadError. In v2, these fields live directly onSyncStatus; accessing them viadataFlowStatusis the deprecated path.For reviewer consideration — may be worth documenting
None.
Source PR: powersync-ja/powersync-js#999 — merged to the
v2pre-release branch on 2026-06-22.Filed automatically by Claude Code (
claude-sonnet-4-6). A human must verify the scope, prepare the docs PR, and publish it only once this update has been released.