Working with APIs in React can get messy when you rely on useEffect and useState for everything. Handling loading states, errors, and caching manually takes extra effort and can quickly become hard to manage. React Query simplifies this by managing data fetching and state in a much cleaner and more structured way. 💡 In this slide deck, I covered: 1️⃣ How useQuery works for fetching data 2️⃣ useMutation for POST, PUT, and DELETE requests 3️⃣ Built in loading and error states 4️⃣ Caching, refetching, and configuration options 5️⃣ Setting up QueryClientProvider If you are working with APIs in React, this is definitely something worth learning. ✨ #ReactJS #ReactQuery #JavaScript #FrontendDevelopment #WebDevelopment  #APIIntegration #StateManagement #TanStack #SoftwareDevelopment

𝐌𝐨𝐬𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬 𝐃𝐨𝐧’𝐭 𝐔𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝 𝐭𝐡𝐞 𝐄𝐯𝐞𝐧𝐭 𝐋𝐨𝐨𝐩 If you can’t explain the Node.js event loop clearly… You’re not done learning yet. Here’s the simple breakdown: 1️⃣ Call Stack 2️⃣ Web APIs 3️⃣ Callback Queue 4️⃣ Microtask Queue 5️⃣ Event Loop The biggest mistake I see: Developers blocking the event loop with: - Heavy loops - CPU-intensive tasks - Sync file operations Node.js is single-threaded. But that doesn’t mean it’s slow. It means you must respect the event loop. Can you explain the microtask queue without Google? 😄 🔁 Repost to support the community 👉 Follow Tapas Sahoo for more related content 🙏 #NodeJS #EventLoop #BackendEngineering #JavaScript #SystemDesign

🚀 The Event Loop: Browser vs. Node.js 🌐 Ever wondered how JavaScript stays "fast" despite being single-threaded? The secret sauce is the Event Loop. But depending on where your code runs, the Event Loop wears different hats. 🎩 Here is a quick breakdown of how it works on the Client-side vs. the Server-side: 🖥️ 1. JavaScript in the Browser (Client-Side) In the browser, the Event Loop is all about User Experience. The Goal: Keep the UI responsive. How it works: When a user clicks, scrolls, or fetches data, these actions are added to a task queue. The Flow: The Event Loop constantly checks if the Call Stack is empty. If it is, it pushes the next task from the queue to the stack. This ensures that heavy tasks don't "freeze" the screen while rendering. ⚙️ 2. Node.js (Server-Side) In Node.js, the Event Loop is the backbone of High-Concurrency servers. The Goal: Handle thousands of simultaneous requests without blocking. The Heavy Lifters: For "blocking" tasks like File System (FS) or Database operations, the Event Loop offloads the work to Worker Threads (via the Libuv library). The Callback Cycle: 1. The Event Loop registers a callback for an operation. 2. It hands the task to a worker thread. 3. Once the worker is done, it sends the result back to the queue. 4. The Event Loop picks it up and executes the final callback to send the response. 💡 The Bottom Line Whether you are building a snappy UI or a scalable backend, understanding the Event Loop is the difference between a laggy app and a high-performance system. #JavaScript #NodeJS #WebDevelopment #Programming #SoftwareEngineering #TechTips #react #express #next

🚀 React Tip React Query vs Redux. Many React applications still use Redux for API data. But Redux was never designed for server state. That’s where React Query shines. React Query handles: • API caching   • Background refetching   • Loading & error states   • Automatic updates  Redux is still great for **global UI state**, but server state is better handled by tools like React Query. I made a quick carousel explaining the difference 👇 Curious to know — what do you prefer in your projects? React Query or Redux? #reactjs #javascript #webdevelopment #frontenddeveloper #tanstack #redux

🚀 Day 5/30 – State in React One of the most important concepts 🔥 Today I learned: ✅ State stores dynamic data inside a component → It allows components to manage and update their own data ✅ When state changes → React re-renders the UI → React automatically updates only the changed parts (efficient rendering ⚡) ✅ Managed using useState hook → The most commonly used hook in functional components ✅ State updates are asynchronous → React batches updates for better performance 💻 Example: import { useState } from "react"; function Counter() { const [count, setCount] = useState(0); const handleClick = () => { setCount(prev => prev + 1); // safe update }; return ( <div> <h2>Count: {count}</h2> <button onClick={handleClick}>Increment</button> </div> ); } 🔥 Key Takeaway: State is what makes React components interactive, dynamic, and responsive to user actions. #React #State #FrontendDevelopment #JavaScript #WebDev #CodingJourney #LearnInPublic

🚀 How API Calls Work Using useEffect in React A simple method to fetch API data in React (part of Full Stack / Farm Stack learning): 1️⃣ useEffect runs a function after the component mounts 2️⃣ Inside it, fetch() calls the API URL 3️⃣ await response.json() converts the response into JSON 4️⃣ useState stores the data, triggering a re-render This ensures: ✔ The UI updates reactively when data arrives ✔ Asynchronous side effects are handled correctly ✔ Debugging is easy using console logs Next steps: Adding loading states, error handling, and clean component structure for production-ready Farm Stack components. #ReactJS #WebDevelopment #Frontend #JavaScript #AsyncProgramming #FarmStack #LearningInPublic

Say goodbye to useEffect for data fetching… and switch to React Query. Before: Every request meant handling loading states, errors, caching, and refetching manually. Components slowly turned into messy state managers. With @tanstack/react-query: • Automatic caching • Built-in loading & error states • Smart background refetching • Much cleaner components Now components focus on UI, not network logic. A small change in tooling, but a huge upgrade in developer experience. If you're still fetching data with useEffect, React Query is worth exploring. #React #ReactJS #ReactQuery #TanStackQuery #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering

Day 55 of my #100DaysofCodeChallenge Understanding the Node.js Event Loop Today I moved from using Node.js… to understanding how it actually works internally. Node.js runs JavaScript on a single-threaded event loop. If you block that thread, your entire server stops responding. Here’s what I explored: Event Loop Phases Timers Pending Callbacks Poll Check Close Callbacks Each phase has its own callback queue. Microtask Priority process.nextTick() executes before the event loop proceeds to the next phase. Overusing it can starve the loop and freeze your app. Important Execution Detail When called inside an I/O callback: setImmediate() executes before setTimeout(0) This clarified how Node schedules work internally. I also reinforced what NOT to do in production: Avoid synchronous APIs Avoid CPU-heavy calculations on the main thread Avoid large blocking JSON operations Avoid blocking loops inside request handlers Finally, I started exploring Express.js, the minimal web framework built on top of Node’s HTTP module. Understanding the event loop changes how you design scalable systems. #NodeJS #BackendEngineering #100DaysOfCode #JavaScript #SoftwareEngineering

Why I stopped using useState  for everything in React 👇 I was doing this in EVERY component: const [isLoading, setIsLoading] = useState(false) const [data, setData] = useState(null) const [error, setError] = useState(null) const [page, setPage] = useState(1) const [filters, setFilters] = useState({}) 5 useState calls for related data. 😅 My components were a mess. Here's what I do now: ✅ Related state → useReducer const [state, dispatch] = useReducer(reducer, {  isLoading: false,  data: null,  error: null }) ✅ Server state → React Query // No useState needed at all! const { data, isLoading, error } = useQuery(  ['users'], fetchUsers ) ✅ Global state → Zustand // Cleaner than Redux // No boilerplate! The rule I follow now: → 1-2 simple values = useState ✅ → Related/complex state = useReducer ✅   → API data = React Query ✅ → Global state = Zustand ✅ My components went from  100 lines to 40 lines. 🚀 Are you still using useState  for everything? Comment below! 👇 #ReactJS #JavaScript #Frontend #WebDevelopment #ReactHooks #CleanCode

⚛️ React 19 changes the rules with the new use API 👇 . You can finally read React Context conditionally. Since React Hooks were introduced, we have all lived by the strict "Rules of Hooks": Do not call Hooks inside loops, conditions, or nested functions. This meant if you had a component with an early return, you still had to call useContext at the very top of the file, extracting data you might not even use. It felt inefficient and cluttered. ❌ The Old Way (useContext): Must be called at the top level. Executes on every single render, regardless of conditional logic or early returns. ✅ The Modern Way (use(Context)): Can be called conditionally! • Performance: Only read the Context when your logic actually reaches that line of code. • Flexibility: You can safely wrap use(ThemeContext) inside an if statement or a switch block. • Clean Code: Keep your context reads exactly where they are needed in the UI logic. The Shift: We are moving from strict top-level declarations to flexible, on-demand data reading. (Note: The use API can also unwrap Promises, but reading conditional Context is where it shines for everyday UI components!) #ReactJS #React19 #WebDevelopment #Frontend #JavaScript #CleanCode #SoftwareEngineering #TechTips #ReactJSTips #Tips #FrontendDeveloper #ReactJSDeveloper #Hooks #SoftwareEngineering #ReactHooks