RepoJournal
Meta

Meta

React, React Native, and Jest — the open source under what Meta ships

Pick a date

  1. Fri 1 may
  2. Sat 2 may
  3. Sun 3 may
  4. Mon 4 may
  5. Tue 5 may
  6. Wed 6 may
  7. Thu 7 may
  8. Fri 8 may
  9. Sat 9 may
  10. Sun 10 may
  11. Tue 12 may
  12. Wed 13 may
  13. Thu 14 may
  14. Sat 16 may
  15. Sun 17 may
  16. Tue 19 may
  17. Wed 20 may
  18. Thu 21 may
  19. Sat 23 may
  20. Sun 24 may
  21. Tue 26 may
  22. Thu 28 may
  23. Fri 29 may
  24. Sat 30 may
  25. Sun 31 may
  26. Mon 1 jun
  27. Mon 8 jun
  28. Tue 9 jun
  29. Today 10 jun

The Wire · Showcase

REACT NATIVE TIGHTENS TYPE SAFETY AHEAD OF STRICT TYPESCRIPT ROLLOUT

By RepoJournal · Filed · About Meta

The team is systematically replacing private type references across the codebase to prepare for a breaking TypeScript API migration that will affect every component ref in production.

React Native's Strict TypeScript API rollout is moving forward with foundational work on type consistency [1]. The first wave targets Fantom tests, which were using private HostInstance types that won't survive the migration. This is the infrastructure work that precedes the breaking change, so expect similar PRs across other test suites in the coming weeks. Separately, Android DevTools got a fix [2] for a longstanding blind spot: FormData uploads and one-shot file transfers now show actual payload previews instead of the generic "[Preview unavailable]" message. This unblocks debugging of the most common file upload patterns. The two efforts are happening in parallel but independent - one is cleanup for the type system, the other is purely UX improvement for developers on Android.

Action items

References

  1. [1] Replace use of private HostInstance types in Fantom tests (#56947) facebook/react-native
  2. [2] Fix (android): show payload preview for FormData and one-shot uploads in DevTools (#55764) (#56742) facebook/react-native

FAQ

What changed in Meta on May 24, 2026?
The team is systematically replacing private type references across the codebase to prepare for a breaking TypeScript API migration that will affect every component ref in production.
What should Meta teams do about it?
Review your component ref types now if you use Flow or manual TS definitions - they will change when Strict TypeScript lands • Test FormData uploads on Android DevTools if you ship file handling - the preview now works
Which Meta repositories shipped on May 24, 2026?
facebook/react-native

Related across the cluster

For your repos

The showcase is a teaser.
Your wire is the product.

Same engine. Different stack. Below: what changes when the wire is yours.

Showcase wire

  • •14 famous open source orgs
  • •One wire per day
  • •Public, generic
  • •Read on the web, when you remember

Your wire

  • →Up to 1,500 of your repos - orgs, deps, vendors
  • →Morning and evening briefs
  • →Action items routed to your team
  • →Slack delivery, email, breaking-news CVE alerts

Want a hands-on demo first? Ask a current user for an invite link.