react
Cannot read properties of undefined/null
Cannot read propert(y|ies) of (undefined|null)
Fixes
- 1.Add optional chaining: `obj?.property` instead of `obj.property`
- 2.Add a null check or default value before accessing the property
- 3.Ensure async data is loaded before rendering — use conditional rendering or loading state
runtime-errornull-safety
Related Errors
react3 fixes
React hydration mismatch
Hydration failed because.*server rendered HTML.*didn't match
- •Ensure server and client render same content
- •Use suppressHydrationWarning for dynamic content
react3 fixes
Text content hydration mismatch
Text content does not match server-rendered HTML
- •Don't use Date.now() or Math.random() in render
- •Use useEffect for client-only values
react3 fixes
use client directive error in Server Component
(useClient|use client).*server component
- •Add 'use client' at top of file
- •Move useState/useEffect to client component