What Are React Lazy and Suspense? React Lazy and Suspense allow lazy-loading of components, reducing the initial load time of your app. React.lazy() dynamically imports components Suspense shows fallback UI…

What Is React Strict Mode? React Strict Mode is a tool for highlighting potential problems in an application.It does not render any visible UI, but it activates additional checks and…

What Are Error Boundaries? Error boundaries are React components that catch JavaScript errors anywhere in their child component tree, log them, and display a fallback UI instead of crashing the…

What Are React Portals? React Portals allow you to render components outside the main DOM hierarchy of the parent component.This is useful for modals, tooltips, and overlays. Basic Syntax ReactDOM.createPortal(child,…

What Are React Fragments? React Fragments let you group multiple elements without adding extra nodes to the DOM.They help avoid unnecessary <div> wrappers and keep HTML cleaner. Basic Syntax <React.Fragment>…

What Is useMemo Hook? The useMemo hook memoizes the result of a computation so that it is only recalculated when dependencies change.It is useful for expensive calculations in functional components.…

What Is useCallback Hook? The useCallback hook memoizes a function so that it is not recreated on every render. It’s useful when passing functions to memoized child components to avoid…

What Is React Memo? React.memo is a higher-order component that helps optimize functional components by preventing unnecessary re-renders when props do not change. Basic Syntax const MemoizedComponent = React.memo(Component); Example…

What Is React Context API? The React Context API allows you to share state globally across components without passing props manually at every level. It’s ideal for themes, user authentication,…

React Router is a library for routing in React apps. It allows you to navigate between different components without reloading the page, creating a single-page application (SPA) experience. Installing React…