React useEffect for Side Effects

Ever wondered what really makes React powerful beyond just components and hooks? 🤔 One concept that completely changed how I think about frontend development is how React handles rendering using the Virtual DOM + reconciliation. Instead of directly updating the DOM (which is expensive), React: 1. Creates a lightweight Virtual DOM 2. Compares (diffs) previous and current states 3. Updates only the necessary parts of the real DOM This is why understanding things like: 1. key in lists 2. component re-renders 3. state vs props is not just theory — it directly impacts performance ⚡ 💡 Small insight: A poorly used key can cause unnecessary re-renders, while a well-structured component tree can make your app feel lightning fast. Frontend is not just about making things look good — it’s about efficient rendering, scalability, and user experience. Still exploring deeper into React & JavaScript 🚀 #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #Coding #SoftwareEngineering #LearningInPublic #Tech

🚀 React Re-rendering — Key Concepts Re-rendering is the core of how React keeps UI in sync with data. Without it, there would be no interactivity in our applications. Here are some important insights I've learned: 🔹 State updates are the primary trigger for re-renders 🔹 When a component re-renders, all its child components re-render by default 🔹 Even without props, components still re-render during the normal render cycle (without use of memoization). 🔹 Updating state in a hook triggers a re-render, even if that state isn’t directly used 🔹 In chained hooks, any state update will re-render the component using the top-level hook 🔹 “Moving state down” is a powerful pattern to reduce unnecessary re-renders in large applications #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering #LearningInPublic

🔥 I used to think React worked like this… 👉 “You change something… and the whole page re-renders.” That was my mental model for a long time. And honestly… it made React feel unpredictable. Then I learned what actually happens. ⚛️ React does NOT re-render everything When state changes, React does NOT rebuild the entire UI. Instead: It creates a new Virtual DOM snapshot Compares it with the previous one Detects ONLY what changed Updates just those parts in the real DOM 💡 So what’s actually happening? ❌ Not: “everything re-renders” ✔ But: “React calculates the difference and patches only what changed” 🧠 The mindset shift This changed how I write React code completely. Now I stop thinking in terms of: 👉 “What re-renders?” And start thinking: 👉 “What actually changes?” 🚀 Why this matters Because performance issues in React usually don’t come from React itself… They come from misunderstanding the rendering model. 🧩 Once this clicks, React stops feeling like magic and starts feeling like a system you can control. Have you ever had a React concept you used for months… before finally realizing how it actually works? #React #JavaScript #Frontend #WebDevelopment #CleanCode

I learnt a lot doing this project. Understood the use of React like never before and how certain features are utilized. Features: -> Drag-and-drop tasks across the Todo, Working, Completed columns using a React Library -> Add, edit, and view tasks with modals -> State management using React Context -> Persistent tasks with localStorage -> Learned advanced React hooks, context, and dynamic UI handling This project helped me level up my React skills and understand interactive, state-driven UIs. React Todo Website: https://lnkd.in/eXKm3Hqn Check it out on GitHub: https://lnkd.in/exiv6Tpv #ReactJS #Frontend #WebDevelopment #UIUX #TodoApp #JavaScript

Another project completed! 🚀 I'm excited to share my latest React build: a fully functional Task Manager (To-Do List). For this application, I focused on solidifying core React concepts and state management: 🔹 State Management: Utilizing useState to handle the dynamic array of tasks. 🔹 Array Methods: Implementing map and filter to render, complete, and delete specific items seamlessly. 🔹 Dynamic UI: Real-time updates and conditional styling for an intuitive user experience. Check out the video below to see the functionality in action! I'll leave the link to the GitHub repository in the first comment. 👇 #ReactJS #Frontend #WebDevelopment #JavaScript #SoftwareEngineering

I recently completed a project focused on building and enhancing a Simple Todos app. This project was a great way to dive deeper into React state management, conditional rendering, and dynamic UI updates. Key features I implemented: ✅ Dynamic Task Creation: Added a text input and "Add" button to create tasks on the fly. ✅ Bulk Task Entry: Built a smart "Multi-Add" feature automatically generates three separate entries. ✅ In-Place Editing: Implemented an "Edit/Save" toggle for each item, allowing users to update titles without leaving the list. ✅ Task Completion: Added checkboxes with a persistent strike-through effect to track progress. ✅ Stateful Deletion: Ensured a smooth user experience when removing items from the list. This project pushed me to think about component structure, reusable props, and clean UI logic in React. Check out the implementation here: https://lnkd.in/dtG46cwU #Day97 #ReactJS #WebDevelopment #Frontend #JavaScript #CodingProject #LearnToCode #ReactComponents #NodeJS #ExpressJS #BackendDevelopment #WebDevelopment #NxtWave #LearningJourney #TechAchievement

One thing I truly appreciate about React is how it completely changes the way we think about building user interfaces. Instead of dealing with a huge, complex page, React allows us to break everything down into small, reusable components. Each component handles its own logic and UI, making the entire application more structured and easier to manage. This approach has made frontend development much more: • Organized – No more messy, hard-to-track code • Reusable – Write once, use multiple times • Maintainable – Fix or update one component without affecting the whole app What I found most interesting is how this component-based architecture feels similar to building blocks. You simply create small pieces and combine them to build something powerful and scalable. As someone learning frontend development, this concept has made projects much more enjoyable and less overwhelming. Still exploring more of React, but this is definitely one of the features that stood out for me 🚀 #ReactJS #FrontendDevelopment #WebDevelopment #LearningJourney #JavaScript #Coding

import React from 'react'; Feels like just a line. But that one line can quietly pull in ~100kb - 1mb of bundle size …and all that JavaScript your browser now has to, download, parse, and execute. It introduces layers—abstractions, dependencies, and more JavaScript to the browser. And before you realize it, your “simple project” has grown into hundreds of KBs… sometimes MBs. React isn’t heavy. It just makes it very easy to be careless. If your project truly doesn’t need complex state, routing, or heavy UI logic—why start there? Frameworks like Petite Vue or Alpine.js let you add interactivity without committing to an entire ecosystem. Or if you like JSX (like I do), Preact would do just fine. Just this one decision—choosing simplicity over overengineering— could save you in costs, and probably users you’d otherwise lose to slow load times. And remember, React exists because Facebook had a problem, and you probably don’t have it yet. #WebDevelopment #Frontend #JavaScript #ReactJS #SoftwareEngineering