React Fundamentals: State, Props, and Effects Explained

🚀 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

Ever used something for months… and still couldn’t explain it clearly? That was me with promises in JavaScript. I used them all the time—.then(), async/await, copying patterns—but if someone asked me what a promise actually is, I’d pause. At one point, I realized I was writing code that worked… but I didn’t fully trust myself to debug it if things went wrong. And that’s a different kind of frustration. So I went back to basics. Broke things. Logged everything. Rewrote the same examples in different ways. That’s when it clicked: A promise isn’t just “async magic”—it’s a placeholder for a future result, with clear states: pending, fulfilled, or rejected. Understanding that changed how I approach problems: • I started thinking in terms of flow instead of lines of code • Errors became easier to trace instead of guesswork • async/await finally felt like a tool—not a shortcut And more importantly, I stopped blindly copying code. This experience taught me something bigger than just promises: 👉 Just because your code runs doesn’t mean you understand it 👉 Clarity > cleverness 👉 Slowing down is sometimes the fastest way to grow Still learning. Still refining. But I’m enjoying the process a lot more now. What’s something you’ve used for a long time before it finally clicked? #JavaScript #WebDevelopment #LearningInPublic #AsyncProgramming #GrowthMindset

Day 6 of 100 days. A pattern I’ve consistently observed among aspiring developers… The urge to move quickly from HTML - CSS - JavaScript - React ... without truly mastering any of them. Progress feels fast, but understanding remains shallow. And this apply to both students and many self-taught developers. The challenge: Lack of focus 👉 What I always emphasize: • Commit to mastering one concept at a time • Build small, practical projects for each topic • Minimize distractions and avoid unnecessary jumps In the long run, depth matters more than speed. Focus is often underrated in tech, but it makes all the difference. Are you building depth or just moving fast? #FrontendDevelopment #100DaysOfSolvingCodingProblems #WebDevelopment #CodingTips

Common React Events Every Developer Should Know If you're learning React, understanding event handling is essential for building interactive user interfaces. Here are some of the most commonly used React events and when to use them. 1. onClick: Triggered when a user clicks an element. Commonly used for buttons, menus, and triggering actions. 2. onChange: Fires when the value of an input field changes. Mostly used in forms to capture user input. 3. onFocus: Occurs when an input field becomes active. Helpful for highlighting fields or showing hints. 4. onBlur: Happens when an input field loses focus. Often used for validation after the user leaves a field. 5. onMouseOver: Executes when the mouse moves over an element. Useful for hover effects, tooltips, or previews. 6. onMouseOut Triggered when the mouse leaves an element. Commonly paired with hover interactions. 7. onSubmit Invoked when a form is submitted. Used to handle form data before sending it to a server. 8. onKeyDown: Triggered when a keyboard key is pressed down. Useful for shortcuts or detecting specific keys. 9. onKeyUp: Fires when a keyboard key is released. Often used for live search or input validation. Why these events matter: React events allow developers to create dynamic and responsive applications by responding to user actions in real time. If you're learning React, mastering these events will make your UI much more interactive and user-friendly. #React #WebDevelopment #FrontendDevelopment #JavaScript #Coding #ReactJS #Programming

Day 1 of learning React Today marks the beginning of my journey into React, and I’m excited to share what I’ve learned so far. I started by understanding how to set up React using external libraries and how Babel plays an important role. Since browsers don’t understand JSX directly, Babel compiles it into regular JavaScript that the browser can execute. One thing I’ve realized already is that React makes building user interfaces more structured and scalable. Instead of writing plain JavaScript, we use JSX a syntax that looks like HTML but works inside JavaScript. Here are a few core concepts I explored today: • Components Components are like reusable building blocks for your UI. Instead of writing one large file, you break your interface into smaller, manageable pieces. Example: function Welcome() { return Hello, World!; } • Fragments Sometimes you want to return multiple elements without adding unnecessary divs to your HTML. That’s where fragments come in. Example: <> • Props Props (short for properties) allow you to pass data from one component to another, making your components dynamic. Example: function Welcome(props) { return Hello, {props.name}; } • Conditional Rendering (Guard Operator) In React, we can use the “&&” operator directly inside JSX to render something based on a condition. Example: {isLoggedIn && Welcome back!} This will only display the message if isLoggedIn is true. It hasn’t been easy stepping into something new, but I’m committed to learning and improving every day. #React #JavaScript #FrontendDevelopment #WebDevelopment #LearningInPublic #CodingJourney #100DaysOfCode #BuildInPublic

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

I just finished watching Akshay Saini 🚀's latest deep dive into Promises, Async, and Await from the Namaste JavaScript series, and my mind is officially blown. 🤯 For the longest time, I understood how to use async/await, but I never truly grasped what happens behind the scenes. Akshay has a unique way of breaking down complex concepts—like how the JS engine "suspends" function execution without blocking the call stack—making it look so simple. Key takeaways that stuck with me: ✅ The difference between the "old" way (Promise chaining) vs. the "new" syntactic sugar. ✅ How await actually pauses the function execution while keeping the page responsive. ✅ Handling multiple promises and why the order of execution matters. If you are a developer looking to master JavaScript fundamentals, this video is an absolute must-watch. Huge thanks to Akshay Saini for putting in so much effort to create high-quality, free content for the community. You are making us all better engineers! 🙌 Check out the full video here #JavaScript #WebDevelopment #NamasteJavaScript #Frontend #Programming #Learning #AsyncAwait #TechCommunity #AkshaySaini Thanks to Akshay Saini 🚀 https://lnkd.in/gW5nXUaj

Built a Task Tracker using JavaScript. But the real learning wasn’t the UI, it was debugging real problems. This project helped me move beyond “writing code” to actually understanding how things break in real-world scenarios. Some challenges I faced: • Data not persisting correctly due to localStorage handling • Events not working on dynamically created elements • API-like behavior issues with async flow and DOM updates • UI breaking due to incorrect DOM manipulation • CSS bugs caused by specificity and layout issues Instead of patching things blindly, I debugged and fixed each issue step by step. Key things I learned: • Why JSON.parse is necessary when using localStorage • Difference between response-level errors vs data-level errors • Importance of event delegation for dynamic elements • How small DOM mistakes can break the entire UI • CSS pitfalls like flex overflow, specificity, and animation conflicts I also improved the user experience by: • Adding proper task states (pending/completed) • Ensuring smooth UI updates without reloads • Handling edge cases like empty inputs and invalid actions This project was less about building a “task app” and more about learning how to think like a developer. Project Repo: https://lnkd.in/gCgxHuWC Live Website: https://lnkd.in/gC3CJNx8 Would appreciate feedback! #javascript #webdevelopment #html #css #beginnerdev #100daysofcode #frontenddevelopment #vanillajs

Still going strong on my Web Dev journey with Chai Aur Code! I've now written 4 more blogs as part of my #LearningInPublic challenge — and honestly, these topics were MIND-BLOWING to write about! Here's what I covered this time: Synchronous vs Asynchronous JavaScript – finally understood WHY async exists and how JS handles it under the hood Error Handling in JavaScript – because bugs are inevitable, but handling them gracefully is a skill! Understanding the 'this' Keyword – one of the most confusing things in JS… until now! Map and Set in JavaScript – powerful data structures that every dev should know! Read all 4 blogs here https://lnkd.in/gjmCkPEV Out of 14 total blogs planned, I've completed 4 — and I'm just getting started! Writing blogs forces me to truly understand what I'm learning, not just copy code. That's the real magic of learning in public. #JavaScript #WebDevelopment #ChaiAurCode #LearningInPublic #Programming #Beginners Chai Aur Code Hitesh Choudhary sir Piyush Garg sir Akash Kadlag sir Jay Kadlag sir