React Fragment Key Warning - No Key Prop

1. Using <> shorthand fragment in list (can't add key)
2. Key on parent instead of fragment itself
3. Not understanding when to use fragments
4. Mixing fragment and non-fragment items
5. Complex nested fragments without keys

Use React.Fragment with key for list items:

// Bad - can't add key to <>  
{items.map(item => (
  <>
    
{item.name}
    
{item.email}
  
))}

// Good - use React.Fragment with key
import { Fragment } from 'react';

{items.map(item => (
  
    
{item.name}
    
{item.email}
  
))}