Tagged with react
Accessibility in React still starts with semantic HTML, keyboard support, clear form behavior, and careful ARIA usage.
Accessibility in React: semantic HTML, keyboard support, ARIA, forms, and modal accessibility
React interviews often rely on contrast questions such as props vs state, state vs ref, useEffect vs useLayoutEffect, and Context vs Redux.
Common React interview comparisons
Many React bugs come from mutable state, wrong keys, bad effect dependencies, overused context, and mixing too much logic into UI components.
Common React pitfalls
Data usually flows down from parent to child, while child-to-parent and sibling communication happen through callbacks, lifted state, or shared providers.
Component communication, sibling communication, and composition vs inheritance in React
React supports several conditional rendering styles, and returning `null` is the normal way to render nothing.
Conditional rendering patterns and returning null in React
Context lets a value be shared through a subtree without manually threading props through every intermediate component.
Context API basics, Provider/Consumer, useContext, and Context vs prop drilling
Context is not a full performance or tooling replacement for every state management problem, and global state should be introduced only when local state is no longer enough.
Context performance, Context vs Redux, and when global state is really needed
Custom hooks let you extract reusable stateful logic without changing the component tree structure.
Custom hooks and sharing logic between components
React data fetching is about both getting data and managing cache, loading, error, cancellation, and freshness correctly.
Data fetching in React: useEffect, loading and error states, cleanup, race conditions, AbortController, React Query, SWR, and server vs client state
useEffect is a common place for data fetching and subscriptions, but async work must be cleaned up carefully to avoid races and leaks.
Data fetching, async cleanup, and subscriptions with useEffect