fix: exit pager animation

[troZee]

Summary

Test Plan

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

Compatibility

OS	Implemented
iOS	✅❌
Android	✅❌

Checklist

• I have tested this on a device and a simulator
• I added the documentation in README.md
• I updated the typed files (TS and Flow)

[Copilot]

🟡 Changes recommended

Child pages are still removed before deferred lifecycle destruction, and the regression lacks automated coverage.

1 open finding

• Add automated regression test for exit-transition disposal · New

What changed in this PR

Defers Android Compose pager disposal during native-stack exit animations and adds a reproduction example.

Changes:

• Defers lifecycle destruction until window detachment.
• Adds an exit-animation example and navigation routes.
• Provides test IDs for regression testing.

File	Description
ComposePagerView.kt	Implements deferred disposal.
ExitAnimationExample.tsx	Adds the reproduction flow.
App.tsx	Registers the example routes.

🧠 Review effort: Balanced

---

💡 Configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[troZee]

After:

Screen.Recording.2026-10-14.at.09.34.59.mov

[github-actions]

🟢 e2e: 14 passed

All 14 tests in 10 files

	Test	Time
🟢	tests/basic-pager.e2e.ts · 3 passed	1m 43s
🟢	basic pager › in LTR › pages horizontally	37.0s
🟢	basic pager › in LTR › pages vertically	23.3s
🟢	basic pager › in RTL › pages horizontally with the reversed gesture	42.4s
🟢	tests/issues/issue-1083-modal-set-page.e2e.ts · 1 passed	14.9s
🟢	setPage called behind a native-stack modal lands on the requested page	14.9s
🟢	tests/issues/issue-1098-nested-pager.e2e.ts · 1 passed	13.9s
🟢	outer pager stays responsive after its page count changes around a nested pager	13.9s
🟢	tests/issues/issue-1154-page-change-focus.e2e.ts · 3 passed	44.4s
🟢	leaving a page with setPage blurs its input	13.8s
🟢	leaving a page with a swipe blurs its input	11.1s
🟢	an input focused on the new page keeps focus	19.5s
🟢	tests/material-top-bar.e2e.ts · 1 passed	11.8s
🟢	material top tabs survive a native-stack push and pop	11.8s
🟢	tests/nested-pager-view.e2e.ts · 1 passed	11.4s
🟢	nested horizontal and vertical pagers scroll independently	11.4s
🟢	tests/on-page-selected.e2e.ts · 1 passed	13.4s
🟢	onPageSelected fires an alert for every page change	13.4s
🟢	tests/scrollable-pager-view.e2e.ts · 1 passed	17.3s
🟢	pager inside a ScrollView keeps its page across vertical scrolls	17.3s
🟢	tests/smoke.e2e.ts · 1 passed	9.2s
🟢	horizontal pager pages with the panel buttons	9.2s
🟢	tests/tab-view-inside-scroll-view.e2e.ts · 1 passed	14.2s
🟢	TabView inside a ScrollView swipes tabs and scrolls the page	14.2s

_{e2e 0.18.0 · 4m 14s · android · run artifacts}

[github-actions]

🔴 e2e: 1 failed, 12 passed

🔴 basic pager › in LTR › pages horizontally
tests/support/app.ts:33

ENGINE_FAILURE at step 5 of 5: locator.tap getByTestId("example-basic-horizontal"), after 4.5s

perform tap failed: the iOS automation runner is still finishing a command that overran its watchdog (session e2e-ios-0 on 4E3A6BB3-F417-4829-8DF5-0EA652541F40): The iOS runner is still finishing a previous command that exceeded its execution watchdog (usually an accessibility capture on a heavy or animating screen). The app is fine. Wait a few seconds and rerun. If the next run meets it again, stop the daemon (`npx agent-device daemon stop`) and reboot the simulator (`xcrun simctl shutdown <udid>`, then `boot`).

• Failed on both attempts: ACTION_FAILED at step 1, then ENGINE_FAILURE at step 5.
• Screen: com.pagerviewexample / PagerView

Evidence: log

All 13 tests in 11 files

	Test	Time
🔴	tests/basic-pager.e2e.ts · 1 failed, 2 passed	2m 18s
🔴	basic pager › in LTR › pages horizontally	36.4s
🟢	basic pager › in LTR › pages vertically	39.3s
🟢	basic pager › in RTL › pages horizontally with the reversed gesture	1m 2s
🟢	tests/issues/issue-1083-modal-set-page.e2e.ts · 1 passed	19.2s
🟢	setPage called behind a native-stack modal lands on the requested page	19.2s
🟢	tests/issues/issue-1096-keyboard-shrink.e2e.ts · 1 passed	26.5s
🟢	keyboard avoidance does not shrink the page under the keyboard	26.5s
🟢	tests/issues/issue-1098-nested-pager.e2e.ts · 1 passed	18.9s
🟢	outer pager stays responsive after its page count changes around a nested pager	18.9s
🟢	tests/issues/issue-1142-search-bar-inset.e2e.ts · 1 passed	19.1s
🟢	FlatList inside the pager gets the search bar safe-area insets	19.1s
🟢	tests/material-top-bar.e2e.ts · 1 passed	21.2s
🟢	material top tabs survive a native-stack push and pop	21.2s
🟢	tests/nested-pager-view.e2e.ts · 1 passed	15.7s
🟢	nested horizontal and vertical pagers scroll independently	15.7s
🟢	tests/on-page-selected.e2e.ts · 1 passed	17.3s
🟢	onPageSelected fires an alert for every page change	17.3s
🟢	tests/scrollable-pager-view.e2e.ts · 1 passed	25.7s
🟢	pager inside a ScrollView keeps its page across vertical scrolls	25.7s
🟢	tests/smoke.e2e.ts · 1 passed	9.4s
🟢	horizontal pager pages with the panel buttons	9.4s
🟢	tests/tab-view-inside-scroll-view.e2e.ts · 1 passed	18.8s
🟢	TabView inside a ScrollView swipes tabs and scrolls the page	18.8s

_{e2e 0.18.0 · 6m 11s · ios · run artifacts}