Question 1

How to implement drag and drop with PointerTracker?

Accepted Answer

Use the start callback to initiate drag, move to update position, and end to finalize, tracking pointer coordinates from the Pointer objects. You'll need to handle UI updates and state logic separately.

Question 2

PointerTracker vs Hammer.js for touch events?

Accepted Answer

PointerTracker is lighter and provides low-level tracking for custom implementations, while Hammer.js includes pre-built gestures like swipe and pinch. Choose based on whether you need control or convenience.

Question 3

Does PointerTracker support multi-touch on mobile devices?

Accepted Answer

Yes, it tracks multiple pointers simultaneously through the startPointers and currentPointers arrays, allowing you to build gestures like pinch-to-zoom by comparing pointer positions.

Question 4

How to avoid Safari pointer event bugs with PointerTracker?

Accepted Answer

Set the avoidPointerEvents option to true to force fallback to mouse and touch events, as recommended in the README to work around known WebKit issues.

Question 5

Is PointerTracker compatible with React hooks?

Accepted Answer

Yes, but you need to manage lifecycle: instantiate PointerTracker in useEffect, attach it to a ref, and call stop() on cleanup to prevent memory leaks.

Question 6

What are rawUpdates in PointerTracker and when to use them?

Accepted Answer

RawUpdates provide faster, desynchronized pointer events for scenarios like desynchronized canvases, but they can cause jank if not synchronized with rendering; use only for performance-critical drawing apps.

pointer-tracker

What is pointer-tracker?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions