What Is useTransition? The useTransition hook lets you mark state updates as non-urgent, allowing React to keep the UI responsive during heavy updates. Basic Syntax const [isPending, startTransition] = useTransition();…

What Is useEffect Cleanup Function? The cleanup function in useEffect runs when a component unmounts or before re-running the effect.It’s used to clean up side effects like timers, subscriptions, or…

Both hooks deal with refs in React, but their purpose differs: useRef: Provides a mutable object to access DOM elements or store values. useImperativeHandle: Customizes the instance value exposed to…

What Is useReducer? The useReducer hook is an alternative to useState for managing complex state logic.It uses a reducer function to update state based on actions. Basic Syntax const [state,…

useDebugValue allows you to display debug information for custom hooks in React DevTools.It is only for development and does not affect production performance. Basic Syntax useDebugValue(value, formatFunction); value → value…

useLayoutEffect is similar to useEffect but runs synchronously after DOM updates.It’s useful for reading layout, calculating measurements, or synchronizing DOM changes. Basic Syntax useLayoutEffect(() => { // effect logic return…

Lazy loading delays the loading of images or components until they are about to appear in the viewport.This improves page load speed and performance. Native Lazy Loading Example function App()…

The useImperativeHandle hook customizes the ref value exposed by a child component when using forwardRef.It allows the parent to access specific functions or values. Basic Syntax useImperativeHandle(ref, () => ({…

Controlled components have their state managed by React.The value of input elements is bound to state and updated via onChange. import React, { useState } from "react"; function ControlledInput() {…

Both Refs and Forward Refs are used to access DOM elements, but they have different use cases: Refs: Used inside a component to access its own DOM element. Forward Ref:…