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wire 2026-08-13
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REACT FIXES EVENT LISTENER LEAK, JEST DITCHES SOURCE-MAP-SUPPORT

By RepoJournal · Filed · About Meta · Composed from the cited sources · methodology

SimenB jackpope Minh Vu Alex Hunt Rohan Kulkarni Alan Hughes Aravind M Nair
7 people shipped this
SimenB @SimenB 2 cited jackpope @jackpope 1 cited Minh Vu @fallintoplace 1 cited Alex Hunt @huntie 1 cited Rohan Kulkarni @kulkarni-rohan 1 cited Alan Hughes @alanjhughes 1 cited Aravind M Nair @aravi365

React's Fiber patched inconsistent deletion behavior on text nodes that was silently retaining event listeners, while Jest is finally breaking free from a three-year-old pinned dependency that corrupts stack frames.

React shipped a critical fix for Fragment deletion effects that were leaving event listeners attached to text nodes while removing them from every other node type [1]. This inconsistency created silent memory leaks in applications with heavy text rendering. Across the React Native desk, the team tackled five separate production bugs in one cycle: a virtualized list orientation change that was calculating cell offsets with stale layout data [2], a NULL character truncation bug affecting text rendering on both iOS and Android [3], and a dev settings initialization path that bypassed packager connection setup entirely [4]. React Native also relocated its hand-written TypeScript definitions under a deprecated directory as part of a larger effort to remove deep imports [7]. On the Jest front, SimenB broke the three-year pin on `source-map-support@0.5.13` by building Jest's own implementation that preserves correct stack frame output instead of adopting the upstream spec interpretation that makes error traces harder to read [5]. The team also fixed Jest's stack frame detection logic that was hardcoded to look for `/jest/packages/` on disk, which fails in forks, worktrees, and vendored copies [6]. Activity this period: 15 commits and 3 PRs across the stack.

Action items

References

  1. [1] [Fiber] Run Fragment deletion effects for HostText children ↗ facebook/react
  2. [2] fix(virtualized-lists): invalidate content length on orientation change (#57871) ↗ facebook/react-native
  3. [3] Fix Text truncation at NULL character on iOS and Android (#24129) (#57906) ↗ facebook/react-native
  4. [4] Fix RCTDevSettings init (#57409) ↗ facebook/react-native
  5. [5] feat(@jest/source-map): replace `source-map-support` with a Jest-owned implementation ↗ facebook/jest
  6. [6] fix: detect Jest's own stack frames without assuming a directory name ↗ facebook/jest
  7. [7] Relocate manual .d.ts definitions under types_DEPRECATED/ (#57513) ↗ facebook/react-native

$ ls meta/reviews/ # the step-back reads

the week in review React 19.3 ships View Transitions, RN 0.88-rc breaks Touchable the month in review React, React Native, and Jest harden the stack
Full archive → Weekly reviews →

Quick answers

What shipped in Meta on August 13, 2026?
React's Fiber patched inconsistent deletion behavior on text nodes that was silently retaining event listeners, while Jest is finally breaking free from a three-year-old pinned dependency that corrupts stack frames. In total, 15 commits and 3 pull requests landed.
Who contributed to Meta on August 13, 2026?
7 developers shipped this update, including jackpope, Minh Vu, Alex Hunt, Rohan Kulkarni, Alan Hughes, Aravind M Nair, and SimenB.
What were the notable Meta updates?
[Fiber] Run Fragment deletion effects for HostText children, fix(virtualized-lists): invalidate content length on orientation change (#57871), and Fix Text truncation at NULL character on iOS and Android (#24129) (#57906).
♥

$ log Meta --recent

React Native strips dead config, React compiler fixes exponent folding 21 shipped React Native's generated SwiftPM manifests inherit the app's iOS floor, and SectionList scrolls to the right row 30 shipped React stops emulating bubbling for toggle events, fixes Fragment compareDocumentPosition 9 shipped React Native's Babel preset stops dropping Platform.select side effects 6 shipped

$ log --all # elsewhere on the wire

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$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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