Overview
A Flutter package that efficiently builds scrollable lists and provides real-time notifications when list items enter or exit the visible screen area. It leverages the power of `ListView` while adding a reactive mechanism to detect in-view status, enabling optimized rendering, lazy loading, and performance improvements. Ideal for scenarios like image loading, analytics tracking, or animations triggered by visibility. The package supports all major platforms including mobile, web, and desktop.
Use cases
- Lazy loading images or content
- Tracking viewability for analytics
- Triggering animations on visibility
- Optimizing resource usage in long lists
- Implementing infinite scrolling with visibility checks
Key features
- Real-time in-view detection
- Efficient widget reuse with ListView
- Cross-platform support
- Simple callback-based API
- Minimal boilerplate for integration
Suitable for
- Developers building performance-sensitive lists
- Apps requiring visibility-based actions
- Content-heavy applications with dynamic data
- Teams prioritizing smooth scrolling and responsiveness
Considerations
- May increase memory usage if many listeners are active
- Requires careful handling of callbacks to avoid leaks
- Not ideal for very short lists where overhead outweighs benefits
- Best suited for lists with frequent updates or large datasets