Mukesh Murugan

Frontend Optimization Techniques You Need to Know! Frontend performance is not just about reducing bundle size or lazy loading. Here are some lesser-known but highly effective techniques to improve rendering speed and user experience: 🔹️ CSS Containment (contain) - Limits rendering scope for efficient updates. 🔹️ Preloading - Prioritizes critical assets for faster load times. 🔹️ Async Image Decoding (decoding="async") - Prevents layout blocking. 🔹️ Content-Visibility (content-visibility: auto) - Skips rendering offscreen elements. 🔹️ WebP & AVIF - Optimized image formats for reduced file size. Follow Dimple Kumari for more related content!

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Got this React 18 question in a Product Company interview! The question was simple but smart 👇 🧠 “What is automatic batching in React 18, and how can you disable it?” Batching means React groups multiple state updates together — instead of re-rendering the component after every single state change, it re-renders only once. ✅ Why it matters: Less re-rendering = better performance ⚡ ✅ Batching = Faster UI ⚙️ flushSync = Instant update when required #React18 #ReactJS #FrontendInterview #JavaScript #WebDevelopment #ProductCompanyInterview

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Ever wondered which data structure powers your undo button? Or how autocomplete, search suggestions, or dropdown filters actually work? Most frontend devs focus on tools and frameworks… But the real magic lies in understanding data structures-and using the right one at the right time. Here’s a visual breakdown of 11 essential data structures every frontend developer should know: ✅ Arrays, Objects, and Sets for data rendering ✅ Stacks and Queues for UI workflows ✅ Trees and Graphs for nesting and relationships ✅ Maps and Tries for smart search & caching ✅ Heaps for fast prioritization Learn what they are, when to use them, and where they shine in real-world frontend apps like React, Vue, and Next.js. Follow Sanuj Bansal for more #frontendengineer #javascript #react #webdevtips #datastructures #codingtips #reactjs #frontenddevelopment

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I’ve been building with React since its earliest days Over 13 years of hands-on experience across startups and global MNCs. From class components to hooks, and now to React 19, I’ve seen how each release reshapes modern web development. 🔑 Key Highlights in React 19 -- Server Components by default – effortless data-fetching and lightning-fast rendering. -- Actions API – cleaner async logic and simpler state handling. -- Improved Streaming & Suspense – render critical UI instantly for a smoother UX. -- Concurrent Features – responsive interfaces even under heavy traffic. 💡 Why This Matters -- For Developers: React 19 skills are already appearing in interviews—learning it early gives you an edge. -- For Teams: Better performance and easier maintenance mean lower costs and faster releases. -- For Businesses: A stronger foundation for scalable, high-traffic applications. 🏆 My Expertise -- Led React migrations for HCL, TCS, and multiple product companies. -- Trained thousands of engineers and built end-to-end MERN stack solutions. -- Every insight here is drawn from production projects—not just documentation. 🛠️ How to Start -- Upgrade a small side project to React 19 to identify breaking changes. -- Explore Server Components with a simple Node/Express API. -- Master the Actions API—it’s becoming a must-ask interview topic. Get the Guide Here -- https://lnkd.in/dbic4PkT For More Technical Knowledge -- WhatsApp Channel: https://lnkd.in/dFyqKJU3 -- YouTube Channel: https://lnkd.in/d5Kfb9sA 🚀 Your skills are your superpower—upgrade them daily!

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📅 Day 17 | Spring Boot Annotation Series Are you still manually wiring your beans or using too many @Autowired fields? Check out how @RequiredArgsConstructor from Lombok can help you write cleaner, safer code in Spring Boot projects! Why use @RequiredArgsConstructor? ✅ Promotes immutability by ensuring final fields are always initialized. ✅ Cuts boilerplate—Lombok auto-generates the required constructor for all final fields. ✅ Favors constructor-based dependency injection, which is easier to test and maintain than field injection. ✅ Makes unit testing smooth—you can inject mocks into constructors. 💡 This approach leads to cleaner classes, encourages solid design, and reduces errors by making dependencies explicit! Are you still using @Autowired everywhere, or have you tried Lombok’s constructor injection? Share your experience in the comments! #SpringBoot #Java #SpringTips #Lombok #RequiredArgsConstructor #CleanCode #DependencyInjection

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Learn these concepts before jumping to Framework/library Before diving into any library or framework, it's crucial to have a strong command of #JavaScript itself. here's a step-by-step roadmap to guide your journey: 𝐁𝐚𝐬𝐢𝐜𝐬 𝐨𝐟 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 - Variables (let, const, var) - Data Types (String, Number, Boolean, Object, Array) - Operators (Arithmetic, Comparison, Logical) 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 𝐒𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞𝐬 - Conditional Statements (if-else, switch) - Loops (for, while, do-while) - Break and Continue 𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐬 - Function Declaration and Expression - Arrow Functions - Callback Functions - Higher-Order Functions 𝐎𝐛𝐣𝐞𝐜𝐭𝐬 𝐚𝐧𝐝 𝐀𝐫𝐫𝐚𝐲𝐬 - Object Creation and Manipulation - Array Methods (map, filter, reduce) 𝐀𝐬𝐲𝐧𝐜𝐡𝐫𝐨𝐧𝐨𝐮𝐬 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 - Promises - Async/Await - Callback Hell and How to Avoid It 𝐃𝐎𝐌 𝐌𝐚𝐧𝐢𝐩𝐮𝐥𝐚𝐭𝐢𝐨𝐧 - Selecting Elements (getElementById, querySelector) - Changing Content and Styles - Event Listeners (click, input, submit) 𝐄𝐒𝟔 - Destructuring - Spread and Rest Operators - Template Literals - Default Parameters - Modules (import/export) 𝐃𝐚𝐭𝐚 𝐒𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞𝐬 - Arrays and Objects - Sets and Maps - WeakSets and WeakMaps 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐂𝐨𝐧𝐜𝐞𝐩𝐭𝐬 - Closures - Hoisting - Prototypes and Inheritance - The 'this' keyword - Scope (Global, Local, Block) 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐢𝐧 𝐭𝐡𝐞 𝐁𝐫𝐨𝐰𝐬𝐞𝐫 - Event Loop - Browser APIs (LocalStorage, Fetch API) - Web Components 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬 - Overview of Popular Frameworks (React, Angular, Vue) 𝐓𝐨𝐨𝐥𝐢𝐧𝐠 𝐚𝐧𝐝 𝐁𝐮𝐢𝐥𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 - npm and Yarn - Webpack and Babel - ESLint and Prettier for Code Quality 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐢𝐧 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 - Unit Testing with Jest - Integration Testing - End-to-End Testing with Cypress 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 - Understanding the Call Stack - Debouncing and Throttling - Memory Management and Garbage Collection 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 - CI/CD Basics - Hosting JavaScript Apps (Netlify, Vercel) - Minification and Bundling for Production 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐢𝐧 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 - XSS and CSRF Prevention - Content Security Policy (CSP) - Sanitizing Inputs 𝐁𝐮𝐢𝐥𝐝 𝐚𝐧𝐝 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 - Using Parcel or Webpack for Bundling - Continuous Integration/Continuous Deployment (CI/CD) - Deploying on Platforms like Heroku, Netlify, Vercel Keep learning and sharing! 💙 Follow Alpna P. for more related content! ------------------------------------------------------------------------------------------- 🤔 Having Doubts in technical journey? 🚀 Book 1:1 session with me : https://lnkd.in/gQfXYuQm 🚀 Subscribe and stay up to date: https://lnkd.in/dGE5gxTy 🚀 Get Complete React JS Interview Q&A Here: https://lnkd.in/d5Y2ku23 🚀 Get Complete JavaScript Interview Q&A Here: https://lnkd.in/d8umA-53 #freshers #javascript #fundamentals #webdeveloper #frontend

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🚀 Experienced frontend devs can’t ignore this question while preparing for JavaScript Interviews - New blog at FrontendGeek.com That question is 👇 ✅ Implement setInterval polyfill in JavaScript? This question is tricky since this requires knowledge of how timers work behind the scenes. In an interview, you can use setTimeout to implement setInterval polyfill, but you should be aware of the basics of implementation to ace this question. 🚀 Published this blog with a step-by-step, simplified explanation Link - https://lnkd.in/d9RGvmPB ✍️ Comment down Which is the hardest question you have encountered in a JavaScript interview? --- ✅ Check out FrontendGeek.com to prepare for all rounds of Frontend Interviews with the best curated resources for free. 🚀 Follow Anuj Sharma & FrontendGeek to stay tuned with Frontend Interview preparation tips, development & jobs-related stuff #frontend #frontendinterview #javascript #js #reactjs #interview #preparation #questions #frontendgeek #javascriptinterview #javascriptquestions

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𝟵 𝗧𝘆𝗽𝗲𝘀 𝗼𝗳 𝗔𝗣𝗜 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝘁𝗼 𝗘𝗻𝘀𝘂𝗿𝗲 𝗥𝗼𝗯𝘂𝘀𝘁 𝗮𝗻𝗱 𝗦𝗲𝗰𝘂𝗿𝗲 𝗔𝗣𝗜𝘀 APIs are the backbone of modern software development, enabling seamless communication between different applications and services. But just like any other software component, APIs need thorough testing to guarantee reliability, performance, and security. This post delves into the nine crucial types of API testing you should consider: 1. 𝗩𝗮𝗹𝗶𝗱𝗮𝘁𝗶𝗼𝗻 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Ensures data integrity and adherence to predefined standards. Imagine it as checking your ID before entering a building – you need to meet the criteria. 2. 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝗮𝗹 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Verifies that the API performs its intended functions accurately. Think of it as testing different functionalities of a vending machine to ensure it dispenses the correct product and amount. 3. 𝗨𝗜 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Validates the API's user interface interactions and responsiveness. This is like testing the buttons and display of the vending machine to ensure they work smoothly. 4. 𝗟𝗼𝗮𝗱 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Assesses the API's performance under varying levels of user demand. Imagine simulating a rush of people trying to use the vending machine at the same time to see if it can handle the load. 5. 𝗥𝘂𝗻𝘁𝗶𝗺𝗲/𝗘𝗿𝗿𝗼𝗿 𝗗𝗲𝘁𝗲𝗰𝘁𝗶𝗼𝗻: Monitors API behavior in real-time, identifying errors and exceptions. This is like having a security guard monitoring the vending machine for any malfunctions or suspicious activity. 6. 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Identifies vulnerabilities and safeguards against potential security threats. Think of it as penetration testing the vending machine to ensure no one can tamper with it or steal your snacks. 7. 𝗣𝗲𝗻𝗲𝘁𝗿𝗮𝘁𝗶𝗼𝗻 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Simulates real-world attacks to uncover weaknesses in the API's security. Imagine a hacker trying to exploit the vending machine's security flaws to get free snacks. 8. 𝗙𝘂𝘇𝘇 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Injects invalid, unexpected, or random data to detect vulnerabilities. This is like throwing weird objects into the vending machine to see if it crashes or dispenses something unexpected. 9. 𝗜𝗻𝘁𝗲𝗿𝗼𝗽𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Verifies seamless communication and compatibility with diverse systems. Imagine ensuring the vending machine works with different payment methods and currencies. Remember, API testing is an ongoing process, not a one-time event. By incorporating these nine testing types into your development workflow, you can build robust, secure, and high-performing APIs that empower your business. Want to know more? Follow me or connect🥂 Please don't forget to like❤️ and comment💭repost♻️ x.com/sina_riyahi medium.com/@Sina-Riyahi Instagram.com/Cna_Riyahi github.com/sinariyahi

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