README.md

List-Performance-Inline-Objects Exercise

Rule

Avoid inline objects in renderItem: don't create new objects (or style objects) inside renderItem to pass as props; pass the item or primitives so memoization works. See list-performance-inline-objects rule.

• Forbidden: user={{ id: item.id, name: item.name, ... }} or inline style={{ ... }} in renderItem.
• Required: Pass item directly or pass primitive props; use stable style references or derive inside the child.

Problem

work.tsx creates a new object { id: item.id, name: item.name, avatar: item.avatar } inside renderItem. Refactor to pass the item directly (or primitives) instead.

How to run

1. Run tests: pnpm test:exercise:list-performance-inline-objects or pnpm test exercises/13-list-performance-inline-objects
2. Edit work.tsx to pass the item (or primitives) without creating an inline object in renderItem.
3. Run tests again until they pass.
4. Compare with solution.tsx.

Reset (optional)

pnpm run exercise:list-performance-inline-objects:reset