What is the virtual DOM and how does React use it
· React
Explanation of the virtual DOM concept, how React uses it for efficient UI updates, and why it matters for performance.
Category: React
60 questions in React.
How to implement dark mode in a React app
· React
Toggle between light and dark themes using CSS variables, local storage, and React context.
How to implement authentication in React
· React
Secure a React application with login flows, token storage, route guards, and session management.
How to optimize React renders with useMemo and useCallback
· React
Prevent unnecessary re-renders by memoizing expensive computations and stable callbacks in React.
How to deploy a React app to production
· React
Learn strategies for building and deploying React applications securely and efficiently.
How to test React components with Testing Library
· React
Write maintainable React component tests focused on user behavior rather than implementation details.
What are React server components
· React
Understand React Server Components, how they reduce client-side JavaScript, and when to use them.
How to use React Query for data fetching
· React
Simplify data fetching, caching, and synchronization in React with React Query (TanStack Query).
What is hydration in React and why does it matter
· React
Understand React hydration, common pitfalls, and how to debug hydration mismatches.
How to implement pagination in React
· React
Build efficient paginated lists in React using offset-based or cursor-based strategies.