React Interview Question: Code Splitting & Lazy Loading in React

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? In React, 𝗱𝗲𝗿𝗶𝘃𝗲𝗱 𝘀𝘁𝗮𝘁𝗲 𝗶𝘀 𝗼𝗳𝘁𝗲𝗻 𝘂𝗻𝗻𝗲𝗰𝗲𝘀𝘀𝗮𝗿𝘆. If a value can be calculated from props or other state, you usually don’t need to store it in "useState". Just compute it during render. Why this matters: - Avoids state synchronization bugs - Reduces complexity - Keeps components predictable 🔧 𝗥𝘂𝗹𝗲 𝗼𝗳 𝘁𝗵𝘂𝗺𝗯: If you can calculate it, don’t store it. Less state = fewer bugs. #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #CodingTips #CleanCode #FullstackDeveloper

🚀 The Template Method Pattern (JavaScript) The Template Method pattern defines the skeleton of an algorithm in a base class but lets subclasses override specific steps of the algorithm without changing its structure. It promotes code reuse and reduces duplication by defining a common template for similar algorithms. This pattern is useful when you have algorithms that share some steps but differ in others. #JavaScript #WebDev #Frontend #JS #professional #career #development

🚀 New Blog: JavaScript Promises: The Complete Beginner-Friendly Guide Frontend Engineer with 4+ years of experience building scalable web applications and simplifying complex JavaScript concepts for real-world use. In this blog, I break down: • What a Promise really is (with real-life analogies) • How async operations actually work behind the scenes • then(), catch(), and finally() explained clearly • All static Promise methods — Promise.all, allSettled, race, and any • Practical examples you’ll actually use in production If you’ve ever been confused by async code or interview questions around Promises — this guide will give you a strong foundation. 🔗 Read here: https://lnkd.in/gQWBHpvh #JavaScript #Frontend #WebDev #ReactJS #NextJS #AsyncProgramming #FullStack

🔁 useState vs useReducer — when does structure actually matter? Simple state? useState gets the job done. Complex logic with rules? useReducer keeps things organized and predictable. Swipe through and see the difference in practice 👉 #ReactJS #JavaScript #WebDev #Frontend

🚀 Selecting DOM Elements with `querySelector` and `querySelectorAll` (JavaScript) The `querySelector` and `querySelectorAll` methods allow you to select DOM elements using CSS selectors. `querySelector` returns the first element that matches the specified selector, while `querySelectorAll` returns a NodeList containing all elements that match the selector. These methods are powerful tools for targeting specific elements within the DOM based on their tags, classes, IDs, or other attributes. Remember that `querySelectorAll` returns a static NodeList, so changes to the DOM after the initial selection won't be reflected in the NodeList. #JavaScript #WebDev #Frontend #JS #professional #career #development

Custom hooks help you extract reusable logic, keep your components clean, and simplify state management. They’re perfect for making your React code more organized and maintainable. Benefits: Reuse logic across components Avoid repetition Simplify complex logic Improve consistency 💡 Pro Tip: Start with small hooks for common patterns—it saves time and makes your projects scalable! #ReactJS #CustomHooks #WebDevelopment #Frontend #JavaScript #CleanCode

Built a Password Generator using React while learning React Hooks in depth. Worked with useState, useEffect, useCallback, and useRef to understand state management, DOM access, and performance optimization in a practical way. #ReactJS #WebDevelopment #Frontend #LearningInPublic #JavaScript

🚀 Iterators and Generators (JavaScript) Iterators provide a standardized way to access elements of a collection sequentially. Generators are special functions that can be paused and resumed, allowing you to create iterators easily. Generators use the `yield` keyword to return values one at a time. Iterators and generators are fundamental to the `for...of` loop and other iterable-based features. #JavaScript #WebDev #Frontend #JS #professional #career #development

🚀 Iterators and Generators (JavaScript) Iterators provide a standardized way to access elements of a collection sequentially. Generators are special functions that can be paused and resumed, allowing you to create iterators easily. Generators use the `yield` keyword to return values one at a time. Iterators and generators are fundamental to the `for...of` loop and other iterable-based features. #JavaScript #WebDev #Frontend #JS #professional #career #development

If you're a 𝐑𝐞𝐚𝐜𝐭 developer, you've definitely fought with 𝐮𝐬𝐞𝐄𝐟𝐟𝐞𝐜𝐭 dependencies. But this new 𝐑𝐞𝐚𝐜𝐭 𝐇𝐨𝐨𝐤 changes the game. Why do I have to put this in the dependency array? I don’t even want it to re-run that frustration is finally over 😄 𝐓𝐡𝐞 𝐂𝐨𝐦𝐦𝐨𝐧 𝐏𝐫𝐨𝐛𝐥𝐞𝐦 Let's say, you want to track a page visit whenever the url changes. But inside your 𝐮𝐬𝐞𝐄𝐟𝐟𝐞𝐜𝐭 you also use a 𝐫𝐞𝐚𝐜𝐭𝐢𝐯𝐞 value like quantity. 𝐍𝐨𝐰 𝐀𝐜𝐜𝐨𝐫𝐝𝐢𝐧𝐠 𝐭𝐨 𝐑𝐞𝐚𝐜𝐭 𝐫𝐮𝐥𝐞𝐬: • If you use reactive value, you must add it as dependency • But If you add it the effect re-runs every time 𝐪𝐮𝐚𝐧𝐭𝐢𝐭𝐲 changes • Your page tracking fires again and again  • If you remove quantity, you get an 𝐄𝐒𝐋𝐢𝐧𝐭 warning. • Disabling ESLint? Not a professional solution. 𝐒𝐨 𝐰𝐡𝐚𝐭 𝐰𝐞 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐰𝐚𝐧𝐭? • We want the effect to run only when url changes. • We don’t care if quantity changes. The Solution is 𝐮𝐬𝐞𝐄𝐟𝐟𝐞𝐜𝐭𝐄𝐯𝐞𝐧𝐭 hook React introduced useEffectEvent to solve exactly this problem. It allow you to • Use reactive values inside effects • Without forcing them into the dependency array • Without breaking the rules Now: • The effect only depends on url • quantity is safely used • No unnecessary re-runs • No ESLint suppression • Cleaner and more predictable logic #React #ReactJS #npm #ReactHooks #NextJS #JavaScript #TypeScript #CSS #FrontendDevelopment #WebDevelopment #MERN