Troubleshooting React Native Drag-and-Drop

TL;DR

• Encountered issues with drag-and-drop auto-scrolling in React Native.
• Used React Native draggable flat list within nested scrolling contexts.
• Components felt overbuilt and brittle, requiring simplification.
• Systematically eliminated elements to isolate the problem.

Today was a deep dive into troubleshooting a bug with a drag-and-drop feature in my React Native app. I’m using a React Native draggable flat list in a nested scrolling situation, which has become overly extended over time, making it somewhat brittle.

Main Steps:

1. Identify the Problem:
   • Drag-and-drop was not hitting thresholds correctly; scrolling issues persisted despite attempted fixes.
2. Component Analysis:
   • Investigated a unified list component that might have become too complex.
   • Compared behaviors between similar screens: rock queue versus daily plan screen.
3. Troubleshooting Approach:
   • Started removing elements to see if I could mimic the correct behavior of the rock queue on the problematic screen.
   • Removed unnecessary components to test scrolling and drag handling.
   • Attempted using different view components to eliminate potential conflicts.
4. Challenges:
   • Unable to pinpoint the exact interaction causing the auto-scrolling behavior discrepancy.
   • Realized the need for an isolated example to replicate and fully understand the issue.

The current solution is building simplified and isolated test cases to reproduce the issue more efficiently. It’s a reminder that sometimes scaling back complexity in components is necessary for maintaining functionality and adaptability.