Interview Strike: React & .NET Interview Prep

🚀 8 Advanced React Features You Must Know in 2025 React has grown a lot since its early days. Beyond state, props, and hooks , React 18 introduced powerful advanced features that make apps more responsive, resilient, and scalable . If you’re aiming to level up your React skills, understanding these features is a must. In this blog, we’ll explore 8 advanced React features with definitions, explanations, and code examples . 1. ⚡ Concurrent Rendering (React 18) Definition Concurrent Rendering in React 18 allows React to prepare multiple versions of the UI simultaneously without blocking the main thread. Explanation Makes rendering interruptible and non-blocking . Keeps the UI responsive during heavy updates . Enabled by default in React 18 with features like startTransition and useDeferredValue . Example import { useState } from "react"; function App() { const [count, setCount] = useState(0); return ( <div> <button onClick={() => se...

React is powerful, but as apps grow, performance can suffer if we’re not careful. Extra re-renders, long lists, or heavy computations can slow down the user experience. Luckily, React provides built-in tools and patterns to keep apps fast and responsive. In this blog, we’ll explore 7 essential techniques for React performance optimization with definitions, explanations, and practical examples. 1. Reconciliation & Virtual DOM → How React Decides to Re-render Definition : React uses a Virtual DOM (a lightweight copy of the real DOM) and a process called Reconciliation to update UI efficiently. Explanation : When state/props change, React builds a new Virtual DOM tree. It compares the new tree with the old one (diffing algorithm). Only the changed parts are updated in the real DOM. Example : function Counter() {   const [count, setCount] = React.useState(0);   return (     <div>       <h2>Count: {count}</h2> {/* Only this updates */...