react

React error boundaries catch JavaScript errors in child components, log them, and display fallback UI instead of crashing the entire app. Since error boundaries must be class components in React, I create a generic ErrorBoundary wrapper and use it aro

State management solutions handle data flow in complex applications. I use React Context API for moderate state sharing without prop drilling. The createContext function creates context objects, while Provider passes data down the tree. The useReducer

Async validation checks constraints that require server communication, like username availability or email uniqueness. React Hook Form's validate option accepts async functions that return error messages or true. I debounce async validators to avoid e

Search inputs that fire API requests on every keystroke create poor UX and waste server resources. Debouncing delays the search until typing pauses, reducing requests dramatically. I combine a controlled input component with a custom useDebounce hook

React.memo prevents unnecessary re-renders of components when props haven't changed. I wrap components in memo when they're expensive to render or receive the same props frequently. The component only re-renders if props differ via shallow comparison.