NestJS Simplified: Decorators, Pipes, Services, and Controllers

🚀 Understanding the React Component Lifecycle with Hooks When I first started learning React, one thing confused me a lot: When exactly do hooks run? Sometimes my useEffect ran twice. Sometimes state updates caused unexpected re-renders. And debugging it felt like chasing a ghost in the code. 😅 After spending time digging into it, I realized something simple: React components basically go through three main phases. 1️⃣ Mounting – The component is created This is when the component first appears on the screen. During this phase: useState initializes state useContext reads context useEffect([]) runs once after the first render 2️⃣ Updating – The component re-renders This happens whenever something changes. For example: State changes Props change Context changes React re-renders the component and then runs: useEffect([dependency]) only if the dependency changed. 3️⃣ Unmounting – The component is removed When a component disappears from the UI. This is where cleanup functions become important. Example: Remove event listeners Cancel API requests Clear intervals That’s why useEffect can return a cleanup function. 💡 One small insight that helped me: Think of React components like a life cycle: Born → Update → Die Once this mental model clicks, hooks become much easier to understand. I made this visual guide to simplify the concept 👇 💬 Curious to know: When learning React, which hook confused you the most? useEffect useState useContext Something else? Let’s discuss in the comments 👇 🔖 Save this post if you're learning React. 🔁 Share it with someone who is starting their React journey. #react #reactjs #javascript #webdevelopment #frontenddevelopment #coding #softwaredevelopment #programming

React Cheatsheet (Quick Reference Guide for Developers) useEffect Hook Boost your productivity with a powerful React cheatsheet covering all essential concepts in one place. Quickly revise components, props, state, hooks, lifecycle methods, event handling, conditional rendering, forms, Context API, and performance optimization techniques. Perfect for quick revision, daily development, and interview preparation. Whether you're a beginner or an experienced developer, this cheatsheet helps you recall important React concepts instantly while building scalable applications. Your go-to quick reference to write cleaner and faster React code. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #Coding #Developers #LearnReact #Programming #ReactHooks #CheatSheet #SoftwareEngineering #TechLearning #InterviewPreparation

I built something fun for the React community. A live playground where you can paste any React component and instantly see it working — no setup, no npm run dev, no local environment. Try it here: https://lnkd.in/gejCnyVM The idea is simple: You write or generate a component, paste it, and watch it come to life immediately. It’s built to help you experiment faster, debug visually, and understand components without friction. Here’s a quick way to test it: Go to GPT Ask: “Create a React component for …” Copy the code Paste it into the playground See the result instantly No installs. No configs. Just code → output. It’s especially useful when: You want to quickly test a UI idea You’re learning React and want instant feedback You’re debugging or tweaking components You don’t want to spin up a full project There are bugs right now. That’s expected. This is an evolving tool and I’m actively improving it with each version. Would love for you to try it and break it. Drop feedback, issues, or ideas — especially from fellow React devs. #ReactJS #WebDevelopment #FrontendDevelopment #JavaScript #DeveloperTools #BuildInPublic #IndieHackers #Programming #OpenSource #Coding #DevCommunity #TechProjects #ReactDevelopers #SideProject

🚀 Get ready to supercharge your coding game! Functional programming is the secret sauce 💡 that can elevate your JavaScript skills to new heights! Ever heard people rave about it but not sure why? It's not just a fad—it's a powerhouse tool. Imagine writing code that’s clean, bug-resistant, and easy to test. That's the magic of functional programming. Think about functions like you do pizza slices: everyone takes their piece without taking the whole pie. Yum! Functional programming's core concepts—pure functions, immutability, and higher-order functions—can make your code predictable and efficient. It's not just for the algorithm wizards; even practical web apps benefit hugely! Would you give this a spin in your next project? 🤔 Let’s get the conversation started! Drop your thoughts below or follow for more tech insights. #FunctionalProgramming #JavaScript #CodeBetter #WebDev

React becomes much cleaner when you understand destructuring. One of the most useful JavaScript features in React is destructuring. It helps you pull values out of props, state, and objects in a cleaner and more readable way. Instead of writing: const name = props.name; const age = props.age; you can write: const { name, age } = props; Even better, directly in a component: function Profile({ name, age }) { return <p>{name} is {age} years old.</p>; } You’ll also see destructuring in useState all the time: const [count, setCount] = useState(0); Here: count = current state value setCount = function to update it Why this matters in React: cleaner code better readability fewer repeated references like props. or user. easier component maintenance Destructuring is small, but it makes a big difference in writing modern React code. If you're learning React, master this early — you'll use it in almost every component. What’s one React feature that felt confusing at first but now feels essential? #React #JavaScript #FrontendDevelopment #WebDevelopment #ReactJS #Coding #SoftwareDevelopment #100DaysOfCode #Programming #LearnToCode

Most beginners see a JavaScript for loop as just a line of code. But in reality, it’s a complete control system. This visual breaks it down into what actually happens behind the scenes: Initialization → sets the starting point Condition → decides whether the loop continues Execution → runs your logic Update → moves to the next iteration Repeat… until the condition fails. Once you understand this flow, everything becomes easier: • Iterating through arrays • Building logic step-by-step • Using break and continue effectively • Writing cleaner and more predictable code The difference between a beginner and a confident developer is not syntax — it’s understanding execution flow. If this clicks, loops will never feel confusing again. #JavaScript #WebDevelopment #Programming #Coding #FrontendDevelopment #LearnToCode #Developers #loops #loopsinjs #LearnJs #JsTips #code #forloop #js #jsdeveloper #mern #node #express #aditya #adityathakor

When I first started learning React, React Hooks were one of the most confusing parts for me. I especially struggled with understanding when to use useEffect, useMemo, or useCallback. Most resources explained the theory, but I wanted something more practical. So I built something I wish I had back then — an interactive, self-learning course for the most commonly used React Hooks. NOTE :- FOR BETTER LEARNING EXPERIENCE CLONE THE REPOSITORY 🔗 Live Demo: https://lnkd.in/gsNN-W24 💻 GitHub: https://lnkd.in/g3h3nm9M The course covers: • useState • useEffect • useRef • useMemo • useCallback • useReducer • useContext • Custom Hooks Each lesson includes: • Simple, beginner-friendly explanations • Interactive examples you can experiment with • A section on common mistakes • Small practice challenges The goal was to make learning hooks more practical and less overwhelming, especially for beginners. I’m currently deploying it and would really appreciate honest feedback from the community. If you're learning React (or helping someone who is), this might be useful. #react #javascript #webdevelopment #frontend #learninpublic #coding #reacthooks #beginners #developer

await Only Works With Promises & Thenable Objects - Here's Why This Matters 🚀 Post Content: One of the most common misconceptions about async/await in JavaScript is that await works with any value. It doesn't. The Truth: await only works with: Promises - the standard async pattern Thenable Objects - objects with a .then() method Why Does This Matter? Understanding this distinction helps you: Debug async code more effectively Know when to wrap values in Promise.resolve() Create custom thenable objects when needed Avoid silent failures in your async workflows Pro Tip: If you're awaiting a regular value, it returns immediately. If you need to ensure consistent async behavior, wrap it: await Promise.resolve(value) The more you understand the fundamentals, the better your async code becomes. 💪 #JavaScript #AsyncAwait #WebDevelopment #Promises #CodingTips #FrontendDevelopment #NodeJS #Programming #DeveloperLife #TechBlog #LearningToCode #CodeQuality

If Javascript is single-threaded, how can 'await' wait? 🤔 If it actually waited, the whole app would freeze !! Actually, await pauses the function, not the thread. 1. In an async function, when 'await getSomePromise()' is encountered, the rest of the function is scheduled as a microtask (pausing for "awaited" promise) 2. The thread returns to the caller of async function. 3. Once the Promise resolves it enters the microtask queue, to get executed by javascript engine once the call stack becomes empty. 🧠 Mental model: Think of a function as a chapter in a book 📕, Within a chapter, 'await' simply places a bookmark, moves on to other chapters, and comes back later. 📝 I wrote a short blog explaining this step-by-step with code and execution flow here👇🏻 https://lnkd.in/g5q2CjWU #javascript #asyncawait #webdevelopment #promises #frontend #softwareengineering #eventloop #javascriptinternals #programming #coding #microtasks

Exploring NestJS 👨💻 After learning the basics, I wanted to understand how NestJS compares with Express. Here’s a simple way to look at it: • Express → minimal and flexible, but you structure everything yourself • NestJS → built on top of Express, but gives a clear structure out of the box Why I find NestJS interesting: • Built-in architecture (modules, controllers, services) • Uses TypeScript by default • Scalable and easier to maintain for larger projects Not saying one is better than the other — it really depends on the use case. But for structured backend apps, NestJS feels easier to organize. Still learning and sharing along the way. #NestJS #ExpressJS #NodeJS #BackendDevelopment #WebDevelopment #SoftwareEngineering #LearnInPublic #Programming