Deepak Singh Rawat’s Post

🚀 30 Days of React.js Tips – Day 19 📌 Topic: React Hooks (useEffect) Today’s learning was all about useEffect, one of the most powerful and commonly used Hooks in React. Understanding this Hook helps in managing side effects smoothly and makes applications more dynamic and efficient. 📚 Key Learnings from Day 19: ✔ Understanding what side effects are in React ✔ Using useEffect for API calls and data fetching ✔ Controlling execution with dependency arrays ✔ Cleaning up effects to prevent memory leaks ✔ Replacing lifecycle methods with modern Hook patterns 💡 Why useEffect Matters: Almost every real-world application needs to fetch data, update the DOM, or listen to events. useEffect allows developers to handle these operations in a clean and organized way, improving performance and user experience. 🔑 Key Insight: 👉 Mastering useEffect means mastering how your application behaves after rendering. 📈 Growing stronger in React every day — because consistent learning creates confident developers. 💬 Comment “useEffect” if you are currently learning React Hooks 👇 👍 Like & share to support this learning journey #30DaysOfReact #ReactJS #ReactHooks #useEffect #FrontendDevelopment #WebDevelopment #JavaScript #MERNStack #LearnInPublic #CodingJourney ✨ Day 19 complete. Moving closer to React mastery! 🚀

Thinking about diving into React.js? Here are some essential tips to kickstart your journey in this powerful JavaScript library. - **Understand the Basics**: Before jumping into React, ensure you're comfortable with JavaScript ES6 features like arrow functions, destructuring, and modules. A solid foundation will make learning React much smoother. - **Component-Based Architecture**: Embrace the component-based structure of React. Start by breaking down your UI into reusable components. This will not only make your code cleaner but also enhance maintainability. - **State Management**: Learn how to manage state effectively. Begin with local state using `useState` and gradually explore more advanced options like Context API or Redux as your applications grow. - **Hooks are Your Friends**: Familiarize yourself with React Hooks. These functions allow you to use state and other React features without writing a class, making your code more functional and concise. - **Practice with Projects**: Apply your knowledge by building small projects. Start simple, like a to-do app, and gradually increase complexity. This hands-on experience is invaluable. - **Community and Resources**: Join React communities and forums. Platforms like GitHub, Stack Overflow, and Reddit are great for finding resources, asking questions, and connecting with other developers. In summary, mastering React.js takes time and practice, but with these foundational tips, you'll be well on your way. What are your favorite React resources or tips for beginners? Let's share our knowledge! #ReactJS #WebDevelopment #JavaScript #Frontend #Programming #Coding #DeveloperTips #LearnToCode

⚛️ Day 10 of Learning React.js Today I learned about Hooks in React.js. I understood that Hooks allow us to use state and other React features inside functional components. Earlier, state was mainly used in class components, but Hooks make functional components more powerful and flexible. What I learned today: What are Hooks in React Why Hooks are used Basic idea of useState How Hooks improve code structure Managing dynamic data inside components Learning Hooks made me realize how React handles dynamic UI updates efficiently. Things are starting to connect now — components, props, functions, and state. Step by step, building stronger React fundamentals 🚀 #ReactJS #Hooks #useState #FrontendDevelopment #JavaScript #WebDeveloper #LearningJourney #Consistency

Why useEffect Is the Most Misunderstood Hook in React 📢 When I first started using React, I thought useEffect was simple. “Run this after render.” That’s it. But the more I worked with it, the more I realized… useEffect is not about lifecycle. It’s about synchronization. The Biggest Misunderstanding Many developers treat useEffect like: - componentDidMount - componentDidUpdate Or a place to “just put side effects” That mindset causes: - Infinite loops - Missing dependency bugs - Unnecessary API calls - Confusing behavior What useEffect Actually Is? useEffect exists to synchronize your component with something outside of React. That could be: - An API request - A subscription - A timer - The browser DOM - Local storage If there’s nothing external to sync with… You probably don’t need useEffect. The Dependency Array Is Not Optional This is where most bugs happen. When you ignore dependencies: - React re-runs the effect unexpectedly - Or worse… doesn’t re-run when it should The dependency array is not about controlling when the effect runs. It’s about telling React: “This effect depends on these values. If they change, re-sync.” That mental shift changes everything. Common Mistake Using useEffect to derive state: Common Mistake Using useEffect to derive state: useEffect(() => {  setFullName(firstName + " " + lastName); }, [firstName, lastName]); You don’t need this. You can compute it directly: const fullName = firstName + " " + lastName; No effect needed. If you can calculate it during render, you don’t need useEffect. A Better Rule Before writing an effect, ask: 👉 “What external system am I synchronizing with?” If the answer is “none” — rethink it. Final Thought useEffect isn’t complicated. Our mental model is. Once you stop thinking in lifecycle terms and start thinking in synchronization terms… everything becomes clearer. Sharing what I learn about React and backend fundamentals. Follow for more practical breakdowns. . . . . . . #ReactJS   #FrontendDevelopment   #JavaScript   #WebDevelopment   #SoftwareEngineering   #ReactHooks   #LearnToCode

🚀Day 66 Mastering useEffect in React ⚛️ Today’s learning was all about useEffect, one of the most important (and confusing) hooks in React. 🔹What is useEffect? useEffect is used to handle side effects in functional components — things that happen outside rendering, such as: • API calls • Timers • Event listeners • Logging, alerts, UI updates ⚡Think of side effects like real life: • Too much screen time → eye strain. • In React → fetching data or reacting to state changes. 🔹 Structure of useEffect useEffect has three parts: • Effect function → logic (API call, timer, alert) • Cleanup function (optional) → removes listeners, clears timers • Dependency array → controls when the effect runs 🔹useEffect Variations You Must Know • No dependency array → runs on every render • Empty array [] → runs once on mount • Single dependency [count] → runs when that value changes • Multiple dependencies [a, b] → runs when any changes • With cleanup → prevents memory leaks 🔹Practical Examples Covered • Counter App → effect runs when count updates • API Fetching → fetch data once using [] • Loading State → toggle UI while fetching • Timer with setInterval → cleanup clears interval • Window Resize Listener → add/remove event listener safely • Multiple useEffects → separate concerns inside one component 🔹Important Best Practices • Always import useEffect from React • Dependency array controls execution • Cleanup functions prevent memory leaks • React Strict Mode runs effects twice in dev • Multiple useEffects are completely fine Key Takeaways ⚡useEffect manages side effects in React ⚡Dependency array decides when effects run ⚡Cleanup is critical for performance ⚡Understanding lifecycle = fewer bugs 📌 useEffect feels confusing at first, but once you understand when and why it runs, React becomes much more predictable. #Day58 #ReactJS #useEffect #JavaScript #FrontendDevelopment #LearningInPublic #WebDev 🚀

🚀 Day 20 of My React Journey — Mastering Performance and Validation with React Hook Form! Form handling in React can often feel like a hurdle, but today I dived deep into React Hook Form, and it is a total game-changer for building efficient, scalable forms. Here is why this library stands out: ✅ Unmatched Performance: It is lightweight and significantly reduces unnecessary re-renders, making your applications faster and more responsive. ✅ Total Flexibility: It is loosely coupled and easy to extend, allowing you to dynamically add or remove form elements with ease. ✅ Simplified Validation: It leverages built-in HTML validations, making it incredibly easy to configure complex rules without the bloat. My Key Takeaways Today: • The Power of Hooks: I explored the API, including useForm for configuration, useController for controlled components, and useFieldArray for dynamic fields. • Streamlined Implementation: With just a few lines of code, you can use register to track inputs and handleSubmit to manage form data. • Clean Error Handling: Managing user feedback is much cleaner using formState: {errors}, allowing for specific messages based on error types like "required," "minLength," or regex "patterns." Example Syntax I Learned: const { register, handleSubmit, formState: {errors} } = useForm(); I’m excited to keep building and optimizing my React skills. How do you handle forms in your projects? Let’s connect and discuss! 💻✨ #ReactJS #WebDevelopment #CodingJourney #ReactHookForm #FrontendDeveloper #100DaysOfCode #Javascript #SoftwareEngineering #WebDevTips

🚀 Learning and Building with React ⚛️ Hello everyone 👋 Today, I learned some important React concepts and understood clearly what each one is and what it is used for: 🔹 Functional Components – What? -> Functional Components are JavaScript functions that return JSX (UI). -> What for? They are used to create reusable UI parts in a simple and clean way. 🔹 Props – What? -> Props (short for properties) are inputs passed from a parent component to a child component. -> What for? They are used to pass data and make components dynamic and reusable. 🔹 useState – What? -> useState is a React Hook that allows functional components to store and manage state. -> What for? It is used to update and track data like counters, timers, inputs, etc., and re-render the UI when the state changes. 🔹 useEffect – What? -> useEffect is a React Hook used to handle side effects in components. -> What for? It is used for tasks like API calls, timers, subscriptions, and running code when a component mounts, updates, or unmounts. 💡 Hands-on Practice: To apply these concepts, I built: ⏰ Digital Clock – updates time every second using useEffect ⏱ Stopwatch – manages seconds, minutes, and hours using useState and interval logic 📂 Source Code:https://lnkd.in/gq6S_FZD Learning step by step and building real projects to strengthen my foundation 🚀 #ReactJS #LearningAndBuilding #FunctionalComponents #Props #useState #useEffect #FrontendDevelopment #ReactJourney

🚨 “A lot of us start by learning React through tutorials…” But when asked to build a scalable app — without tutorials — they struggle. Because React was never about: ❌ useState ❌ useEffect ❌ Writing JSX Those are just tools. React is about: ✅ Component Architecture ✅ Understanding state flow ✅ Reusability mindset ✅ Performance awareness ✅ Clean mental models The difference between a beginner and a strong React developer isn’t syntax. It’s how they think. When you start thinking in components instead of pages… “When you start understanding data flow, things begin to click.” That’s when React finally “clicks”. Just sharing a thought. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #Developers #CodingLife

I recently published an article breaking down React in very simple terms. I noticed that many beginners struggle not because React is hard, but because it’s often explained as if everyone already understands it. In this piece, I focused on clarity over complexity and practical understanding. If you’re learning React or transitioning into frontend development, this might help. https://lnkd.in/du_-JfUH #FrontendDevelopment #ReactJS #LearningInPublic #TechCareers

🚀 Day 21 of my React Journey: Mastering Timing & Performance! ⚛️ Today was a deep dive into how we manage complex tasks and memory in React to build smoother, more efficient applications. Understanding how to control when and how code executes is a game-changer for performance. Here are my top takeaways from today’s session on Debounce, Throttle, and the useRef Hook: 🔹 The Power of useRef() Introduced in React 18x, the useRef hook is used to configure reference memory. It’s incredibly powerful because it allows you to store values or functions that can be accessed during a process without triggering unnecessary re-renders. While it’s not recommended for presentation, it is the perfect tool to use inside your application logic. 🔹 Debouncing: Efficiency Through Delay Sometimes, executing complex tasks immediately upon every trigger can cause issues. Debouncing is a mechanism where a task is loaded into memory and kept inactive for a specific duration. It ensures that a task is executed only once after being released from memory into the process. • Key Tools: managed via setTimeout() and clearTimeout(). 🔹 Throttling: Consistency Through Intervals Unlike debouncing, Throttling releases a copy of a task from memory into the process at regular time intervals. This creates a sequence of operations performed repeatedly—essential for features like digital clocks or stopwatches. • Key Tools: implemented using setInterval() and clearInterval(). Learning these concepts feels like unlocking a new level of control over the user experience. It's not just about making things work; it's about making them work optimally. Are you using useRef for more than just DOM references? Let’s talk about it in the comments! 👇 #ReactJS #WebDevelopment #Frontend #CodingJourney #LearningToCode #useRef #Javascript #Programming #100DaysOfCode #WebDevTips #SoftwareEngineering #ReactHooks