Q101. How to prevent infinite loops with useEffect?
Infinite loops happen when the effect updates state that’s listed in its own dependency array, which causes the effect to re-run, updating state again and so on. **Infini...
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Q102. Can you use useRef to persist values across renders??
Yes, you can use `useRef` to persist values across renders in React. Unlike `useState`, changing `.current` does not cause re-renders, but the value is preserved across r...
Q103. Can useRef be used to store previous values?
Yes, `useRef` is a common pattern when you want to compare current and previous props or state without causing re-renders. **Example: Storing previous state value** ```js...
Q104. What are Custom React Hooks, and How Can You Develop One?
**Custom Hooks** in React are JavaScript functions that allow you to **extract and reuse component logic** using React’s built-in Hooks like `useState`, `useEffect`, etc....
Q105. What is the useTransition hook and how does it differ from useDeferredValue?
The `useTransition` hook allows you to mark certain state updates as **non-urgent transitions**, keeping the UI responsive during expensive re-renders. It returns a `isPe...
Q106. What is the useSyncExternalStore hook?
The `useSyncExternalStore` hook is designed to **subscribe to external stores** (non-React state sources) in a way that's compatible with concurrent rendering. It's prima...
Q107. How do you share state logic between components using custom hooks?
Custom hooks allow you to **extract and share stateful logic** between components without changing their hierarchy. The state itself is not shared—each component using th...
Q108. What are the differences between useEffect and useEvent (experimental)?
`useEvent` is an **experimental hook** (not yet stable in React) designed to solve the problem of creating **stable event handlers** that always access the latest props a...
Q109. What are the key features introduced in React 18?
React 18, released in March 2022, introduced several groundbreaking features focused on performance and user experience: #### 1. **Automatic Batching** Batch multiple sta...
Q110. What are useFormState and useFormStatus hooks?
These hooks simplify form handling with Server Actions in React 19. #### useFormState Manages form state and handles server responses: ```jsx 'use client' import { useFor...