[RaphaelFakhri]

The fix now lives in GestureHandler: onPointerLeave and onPointerEnter mark the event as a move and pass it to onPointerOutOfBounds, so every handler applies these moves. The Pan-specific overrides are removed. The description below explains the original Pan symptoms, which this change still fixes.

Description

On web, PointerEventManager dispatches the pointermove that takes a tracked pointer out of the view as onPointerLeave, and the one that brings it back as onPointerEnter. PanGestureHandler did not override either, so for those moves it never updated the tracker, the last coordinates or the velocity, and never checked whether to activate. As a result:

• onUpdate does not fire for the move that leaves or re-enters the view.
• If the pointer is released right after, onEnd reports the last in-bounds position instead of the release position.
• A Pan in BEGAN whose activating move lands outside the view does not activate on that move.

This PR makes PanGestureHandler handle the leave and enter moves like any other move: it tracks the pointer, updates the coordinates and velocity, checks activation and sends the update. With shouldCancelWhenOutside, leaving the view still cancels the gesture as before. The shared tracking code of onPointerMove and onPointerOutOfBounds moves to a private trackMove helper.

Fixes #4607

Test plan

Added tests to src/web/handlers/__tests__/PanGestureHandler.test.ts:

• The move that leaves the view sends an update with the new translation, and onEnd reports the release position.
• The move that re-enters the view does the same.
• The move that leaves the view activates a Pan that is still in BEGAN.
• With shouldCancelWhenOutside, leaving the view still cancels the gesture.

Without the fix, the first three fail. With it, yarn test passes (23 suites, 227 tests), and yarn ts-check, ESLint and Prettier are clean.

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• packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts

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📝 Summary

Summary by CodeRabbit

• Bug Fixes
  • Improved web pan gesture handling when the pointer leaves and re-enters a view.
  • Gestures now correctly update movement and can activate when the minimum distance is reached outside the view.
  • Preserved cancellation behavior for gestures configured to cancel when the pointer moves outside the view.

Pointer entry and exit events now use move and out-of-bounds handling in the web gesture handler. New tests verify pan translation, activation at minDist, final translation, and cancellation when shouldCancelWhenOutside is enabled.

Changes: Pan pointer boundary tracking

Layer / File(s)	Summary
Boundary move handling and tests packages/react-native-gesture-handler/src/web/handlers/GestureHandler.ts, packages/react-native-gesture-handler/src/web/handlers/__tests__/PanGestureHandler.test.ts	Pointer enter events now use MOVE semantics and delegate to onPointerMove. Pointer leave events delegate to onPointerOutOfBounds. Tests check translation updates on leave and re-entry, activation at minDist, end-state translation, and cancellation when shouldCancelWhenOutside is enabled.

Suggested reviewers: m-bert

Priority: ➖ Normal

Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to 25447

The boundary-move behavior is covered for the requested Pan gesture scenarios, with no identified merge-blocking risk.

Pre-merge checks: 3

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: web gesture handling now treats pointer moves that leave or re-enter the view as out-of-bounds moves.
Linked Issues check		Issue #4607 requires web Pan gestures to apply pointer moves that leave or re-enter the detector view. GestureHandler.onPointerLeave marks the event as MOVE and routes it through `onPointerOutOfBo…
Out of Scope Changes check		The production change is limited to shared web pointer-event routing required by #4607. The test changes provide focused regression coverage for the issue behavior. No unrelated production behavior or…

Full details: Linked Issues check

Explanation

Issue #4607 requires web Pan gestures to apply pointer moves that leave or re-enter the detector view. GestureHandler.onPointerLeave marks the event as MOVE and routes it through onPointerOutOfBounds; onPointerEnter marks it as MOVE and routes it through onPointerMove. These paths update tracked coordinates, activation state, and active updates. The added Pan tests cover leave, re-entry, activation, release position, and shouldCancelWhenOutside cancellation.

Full details: Out of Scope Changes check

Explanation

The production change is limited to shared web pointer-event routing required by #4607. The test changes provide focused regression coverage for the issue behavior. No unrelated production behavior or unrelated tests are shown.

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Actionable comments posted: 1

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Inline comments:
Review comments at
@packages/react-native-gesture-handler/src/web/handlers/PanGestureHandler.ts:
- Line 327: In the onPointerEnter and onPointerLeave paths, check that
event.pointerId is tracked before calling tryToSendMoveEvent; skip the boundary
update for untracked pointers.

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[m-bert]

Hi @RaphaelFakhri! Thank you for submitting this PR!

I'd like to explore more general solution, could you please confirm that it works and if so - introduce the changes?

Both are in GestureHandler base class:

1. In onPointerLeave, change the following line:

-this.tryToSendTouchEvent(event);
+event.eventType = EventTypes.MOVE;
+this.onPointerOutOfBounds(event);

2. Same in onPointerEnter:

-this.tryToSendTouchEvent(event);
+event.eventType = EventTypes.MOVE;
+this.onPointerOutOfBounds(event);

This change also covers the other handlers, which should be a better solution 😅

[RaphaelFakhri]

@m-bert The base class change works, and it's in the latest commit.

• onPointerLeave and onPointerEnter in GestureHandler now set event.eventType = EventTypes.MOVE and call onPointerOutOfBounds(event).
• The PanGestureHandler overrides and the trackMove helper are gone, so PanGestureHandler.ts is back to its state on main. Pan's existing onPointerOutOfBounds already tracks the pointer, updates the coordinates and velocity, and checks activation.
• The regression tests in PanGestureHandler.test.ts stay unchanged. With only the test file applied, 3 of the 4 new tests fail. With the base class change, yarn jest src/web passes 43/43 and the full yarn test passes 227/227. yarn ts-check, ESLint and Prettier are clean.

[m-bert]

Hi @RaphaelFakhri! Thank you for introducing the changes ❤️

I took the liberty of merging main and changing one onPointerOutOfBounds to onPointerMove, as I've made a copy-paste mistake in my previous message 🫢 Hope you don't mind!