Code doesn’t run by itself. Something runs it for you. 👉 That “something” is called a runtime. It’s the layer between your code and your system. It handles: - Execution - Memory - Communication with the system You don’t see it. But it’s always there. Examples: - Your browser runs JavaScript - Node.js runs backend code - Android runtime runs apps Without a runtime… your code is just text. You click → runtime executes → you see result. This is Part 5 of the series. Tomorrow: how everything connects into one full system. Follow if you want to understand how software actually works behind the scenes. #Programming #Coding #SoftwareDevelopment #WebDevelopment #JavaScript #Nodejs #TechExplained #Developers #ComputerScience

There's a word developers use every single day that nobody actually explains, 'STATE'. You've heard it. You've probably used it. You might have even nodded along when someone mentioned it in a meeting. But if someone stopped you right now and asked, what is 'state' in programming?, could you explain it without hesitating? Most people can't. Not because they're bad developers. Because nobody ever defined it simply. So here's the definition that should've been the first thing anyone told you: State is what your app remembers right now. That's it. That's the whole concept. Here's why this matters so much. The old internet didn't have 'state'. find out why React took over the internet with state 👇 Tell us one perks about 'state' you'd like to add in the comment. #W3Schools #LearnToCode #Programming #WebDevelopment #React #JavaScript #TechEducation #CodingFundamentals #Frontend #DeveloperSkills

🚀 React Series - Day 1 Why Everything in React Starts with Components At its core, React is all about components. Instead of building one large UI, React encourages breaking everything into smaller, reusable pieces - like buttons, headers, cards, and sections. This approach makes applications: • Easier to manage • More reusable • Cleaner to scale Modern React mainly uses functional components, which are simple and powerful when combined with hooks. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

🚨 Circular Dependency in NestJS: The Silent Architecture Killer ❌ Nest can't resolve dependencies of the XService (?). Please make sure that the argument YService is available in the current context. It compiles fine… but at runtime it breaks your app with unresolved dependencies, exposing hidden coupling in your design. It’s not just a NestJS issue — it’s a sign your services are too tightly connected and need better separation of concerns. #NestJS #NodeJS #BackendDevelopment #SystemDesign #SoftwareArchitecture #CleanCode #TypeScript #Microservices #WebDevelopment #Programming #Developers

Most React developers ignore this until their app starts crashing randomly. I recently debugged a frontend issue that didn’t show up in logs, didn’t throw errors… but quietly killed performance over time. Turned out — it was a memory leak in useEffect. Here’s the exact bug (and fix) #React #Frontend #JavaScript #WebDevelopment #MemoryLeaks #Coding #SoftwareEngineering #DevCommunity #CleanCode #Programming

React feels fast because it usually updates only what changed. That is reconciliation. When state changes, React creates a new Virtual DOM tree, compares it with the previous one, finds the difference, and updates only the affected part of the real DOM. That is the reason React apps can stay efficient without you manually touching every DOM node. The infographic shows the full flow step by step, from state change to browser repaint. What React concept should I simplify next? #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #VirtualDOM #Programming #SoftwareEngineering 

Just published a new blog post on Managing Component State with React It shows you how to use the useState Hook to handle state in functional components and make UIs that change and respond to user input. I've also added simple code examples to help you understand how state works in real-world React apps. If you're learning React, this is a must-know concept! 👉 Read more: https://lnkd.in/gcCEDNah #ReactJS #JavaScript #WebDevelopment #Frontend #Programming #SoftwareEngineering

🚀 React Series - Day 10 Avoiding Unnecessary Re-renders with React.memo As applications grow, performance becomes more important. One common issue is unnecessary re-rendering of components. This is where React.memo helps. It is a higher-order component that memoizes a component - meaning it will only re-render if its props actually change. If the props remain the same, React skips rendering that component, improving performance. 👉 This is especially useful for components that: • Receive the same props frequently • Are part of large or complex UIs Used correctly, it can make applications faster and more efficient. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

Functional programming in Node.js is all fun and games until your scaling codebase turns into a giant bowl of spaghetti. Switching to class-based constructors (especially with a structured framework like Hapi) was a game-changer. Suddenly, dependency injection is a breeze, unit testing stops making you cry, and your state management is actually predictable. Yes, there's a learning curve, but future-you will definitely thank present-you. #NodeJS #SoftwareArchitecture #BackendEngineering #CodingLife