Rendering Lists

Displaying lists of data is one of the most common tasks in React. You'll use JavaScript's map() method to transform arrays into elements.

Basic List Rendering

Use map() to transform data arrays into UI elements:

Rendering Objects

Transform arrays of objects:

Extracting List Components

Create reusable list components:

Nested Lists

Render nested data structures:

Exercise: Simple List

Exercise: Object List

Exercise: Nested List

Key Takeaways

1. Use map() - Transform arrays into element arrays
2. Always provide key - Each item needs a unique key prop
3. Prefer unique IDs - Use data IDs over array indices when possible
4. Extract components - Create separate components for list items
5. Handle nested data - Use nested map() for nested structures