Tejas Chorge’s Post

Most frontend bugs aren’t in your code… They’re in your data flow. . . I used to think bugs came from “wrong logic” or missing edge cases in components. But most of the time, the UI was doing exactly what I told it to do… The problem was what I was feeding into it. Data coming in too early (before it’s ready). State updates are happening in the wrong order. Multiple sources of truth are fighting each other. Props being passed without clear ownership And suddenly… A perfectly written component starts behaving unpredictably. . . What fixed it for me wasn’t rewriting components. It was: → Making data flow predictable → Keeping a single source of truth → Being intentional about when and where state updates. → Separating data logic from UI logic . . Clean components don’t save you If your data flow is messy. Frontend isn’t just about how things look… It’s about how data moves. . . What’s one bug you chased for hours…that turned out to be a data flow issue? . . #frontend #reactjs #webdevelopment #softwareengineering #coding #devlife #developerexperience #javascript

5 React Patterns Every Developer Should Know Most developers learn React like this: Write components. Add state. Fetch data. Ship it. Everything works. Until the project grows. Suddenly you get: • Huge components • Logic mixed with UI • Hard-to-reuse code • Difficult debugging The problem usually isn’t React. It’s the patterns you’re using. Here are 5 React patterns every developer should know: 1. Container / Presentational Pattern Separate logic from UI. Containers handle state and API calls. Presentational components focus on rendering. Cleaner components. Easier testing. ⸻ 2. Custom Hooks Pattern Move reusable logic into hooks. Instead of repeating logic everywhere: useAuth() useFetch() useDebounce() You keep your components small and reusable. ⸻ 3. Compound Components Pattern Build flexible components that work together. Example: <Modal> <Modal.Header /> <Modal.Body /> <Modal.Footer /> </Modal> This gives full composition control. ⸻ 4. Render Props Pattern Share logic using a function. <DataFetcher> {(data) => <UI data={data} />} </DataFetcher> Less common today, but still powerful. ⸻ 5. Controlled Components The parent manages the state. <Input value={value} onChange={setValue} /> This pattern is essential for forms and reusable inputs. ——— Good React code is not about writing components. It’s about structuring them properly. What React pattern do you use the most? 👇 #reactjs #react #frontend #javascript #webdevelopment #softwareengineering #frontenddeveloper #codingtips #devcommunity #programming

React has changed a lot over the years. While Custom Hooks (#2) have largely replaced the need for Render Props (#4) in daily tasks, the mental model behind the Container/Presentational pattern (#1) is still the core of clean architecture, especially now with Server Components handling data fetching.

💡 𝗪𝗵𝘆 "𝗢𝗹𝗱 𝗦𝗰𝗵𝗼𝗼𝗹" 𝗩𝘂𝗲 𝗢𝗽𝘁𝗶𝗼𝗻𝘀 𝗔𝗣𝗜 𝗶𝘀 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗮 𝘀𝗲𝗰𝗿𝗲𝘁 𝘄𝗲𝗮𝗽𝗼𝗻 𝗳𝗼𝗿 𝘀𝘁𝗮𝗯𝗹𝗲 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝘀𝘆𝘀𝘁𝗲𝗺𝘀. Unpopular opinion: I still prefer the Vue.js Options API for building complex information systems. 🚀 While the Composition API is fantastic for logic extraction and TypeScript flexibility, the structured nature of the Options API remains a "stability powerhouse" for long-term maintenance. Here’s why: 1️⃣ 𝗘𝗻𝗳𝗼𝗿𝗰𝗲𝗱 𝗣𝗿𝗲𝗱𝗶𝗰𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 In a massive information system, cognitive load is the enemy. With the Options API, I know exactly where to look for data, methods, and watchers. It’s an architectural "place for everything and everything in its place" approach that makes onboarding new developers a breeze. 2️⃣ 𝗥𝗲𝗮𝗱𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝘁 𝗦𝗰𝗮𝗹𝗲 When you’re dealing with hundreds of views and data-heavy forms, the clear separation of concerns (data, computed, methods) acts as a natural guide. It prevents the "spaghetti setup" that can sometimes happen when lifecycle hooks and state are mixed together without strict discipline. 3️⃣ 𝗧𝗵𝗲 "𝗜𝗳 𝗶𝘁 𝗮𝗶𝗻'𝘁 𝗯𝗿𝗼𝗸𝗲" 𝗙𝗮𝗰𝘁𝗼𝗿 Stable systems require stable patterns. Many of the enterprise tools we build today need to be maintainable for the next 5–10 years. The Options API is battle-tested, highly readable, and reduces the risk of over-engineering simple UI logic. Don't get me wrong—the Composition API is a game-changer for shared utility logic. But for the core "bread and butter" views of an information system? The Options API is still my go-to for speed and structural integrity. What’s your take? Are you fully "Setup" or do you still find value in the classic Options approach? 👇 #VueJS #WebDevelopment #Frontend #SoftwareArchitecture #Javascript #CleanCode #Programming

5 React Patterns Every Developer Should Know Most developers learn React like this: Write components. Add state. Fetch data. Ship it. Everything works. Until the project grows. Suddenly you get: • Huge components • Logic mixed with UI • Hard-to-reuse code • Difficult debugging The problem usually isn’t React. It’s the patterns you’re using. Here are 5 React patterns every developer should know: 1. Container / Presentational Pattern Separate logic from UI. Containers handle state and API calls. Presentational components focus on rendering. Cleaner components. Easier testing. ⸻ 2. Custom Hooks Pattern Move reusable logic into hooks. Instead of repeating logic everywhere: useAuth() useFetch() useDebounce() You keep your components small and reusable. ⸻ 3. Compound Components Pattern Build flexible components that work together. Example: <Modal> <Modal.Header /> <Modal.Body /> <Modal.Footer /> </Modal> This gives full composition control. ⸻ 4. Render Props Pattern Share logic using a function. <DataFetcher> {(data) => <UI data={data} />} </DataFetcher> Less common today, but still powerful. ⸻ 5. Controlled Components The parent manages the state. <Input value={value} onChange={setValue} /> This pattern is essential for forms and reusable inputs. Good React code is not about writing components. It’s about structuring them properly. What React pattern do you use the most? 👇 #reactjs #react #frontend #javascript #webdevelopment #softwareengineering #frontenddeveloper #codingtips #devcommunity #programming

𝐘𝐨𝐮𝐫 𝐮𝐬𝐞𝐌𝐞𝐦𝐨 𝐡𝐨𝐨𝐤 𝐦𝐢𝐠𝐡𝐭 𝐛𝐞 𝐝𝐨𝐢𝐧𝐠 𝐦𝐨𝐫𝐞 𝐡𝐚𝐫𝐦 𝐭𝐡𝐚𝐧 𝐠𝐨𝐨𝐝 𝐢𝐧 𝐑𝐞𝐚𝐜𝐭. I often see teams wrapping entire components or complex JSX trees in `useMemo` thinking it's a magic bullet to prevent re-renders. While `useMemo` can optimize expensive calculations, it's not designed to prevent component re-renders. That's `React.memo`'s job. Here's the distinction: - **`useMemo`**: Memoizes a value. If its dependencies haven't changed, it returns the previously computed value without re-running the function. This is great for heavy computations or preparing data. - **`React.memo`**: Memoizes a component. It performs a shallow comparison of props and only re-renders the component if those props have changed. Misusing `useMemo` for components can lead to: 1. **Overhead**: `useMemo` itself has a cost. If the memoized value isn't computationally expensive, the overhead of memoization might outweigh the benefits. 2. **False sense of security**: Your component might still re-render if its parent re-renders, unless the component itself is wrapped in `React.memo` (and its props are stable). **When to use what:** - Use `useMemo` for expensive calculations inside a component (e.g., filtering large arrays, complex data transformations). - Use `React.memo` to prevent unnecessary re-renders of child components when their props are stable across parent renders. Combine with `useCallback` for memoizing function props. Understanding this subtle difference can significantly impact your app's performance and prevent common optimization pitfalls. What's your biggest React performance gotcha you've had to debug? #React #FrontendDevelopment #WebDevelopment #JavaScript #Performance

I spent 3 hours debugging a “simple” frontend issue… and it turned out to be one line. The problem? An API was getting called on every keystroke. Network tab = chaos 👀 Dozens of API calls for a single search. 👉 The issue: No debouncing. Here’s what the code looked like before: useEffect(() => { if (!query) return; fetch(`https://lnkd.in/eNE6UBeq) .then(res => res.json()) .then(data => setData(data)); }, [query]); Every keypress → API call ❌ Here’s the fix (debouncing): useEffect(() => { if (!query) return; const timer = setTimeout(() => { fetch(`https://lnkd.in/eNE6UBeq) .then(res => res.json()) .then(data => setData(data)); }, 300); return () => clearTimeout(timer); }, [query]); ✅ API calls reduced by ~70% ✅ Smoother UI ✅ Better user experience Lesson: Frontend performance isn’t just about what you render… It’s about when you trigger things. Small change. Big impact. Have you used debouncing or throttling in your apps? Where did it make the biggest difference? #frontend #reactjs #javascript #webperformance #softwareengineering

Everything was working… until production said otherwise 😅 One of the trickiest bugs in JavaScript is when your code is technically correct… but finishes in the wrong order. Many developers think: “If I use async/await, I’m safe.” Sadly… no 😄 async/await makes code look clean. It does NOT control which request finishes first. That’s where race conditions begin. Simple example: User searches “React” → Request 1 starts Immediately searches “Node.js” → Request 2 starts If Request 1 finishes later, old data can replace the new result. Now your UI confidently shows… the wrong answer. Classic. Same thing happens in Node.js too: ✔ Multiple API calls updating the same data ✔ Parallel requests overwriting each other ✔ Background jobs fighting like siblings Everything runs. Everything breaks. How to avoid it: ✔ Cancel old requests ✔ Ignore stale responses ✔ Use request IDs ✔ Debounce fast actions ✔ Handle backend concurrency properly Big lesson: async/await is syntax. Correct execution order is architecture. Very different things. Good code is not just: “It runs on my machine.” Good code is: “It runs correctly in production.” 😄 Have you ever debugged a race condition bug that made you question your life choices? 👇 #JavaScript #NodeJS #AsyncAwait #RaceConditions #FrontendDevelopment #BackendDevelopment #SoftwareEngineering #WebDevelopment

Nobody expects to fail these 7 React questions. And then they do. The tricky part? None of them are about some lesser-known API. They test whether you actually understand how React works under the hood. Here's what catches people off guard: 🔴 setState batching — calling setCount(count + 1) three times doesn't give you 3. It gives you 1. Closures are sneaky. 🟡 useRef vs useState — mutating a ref updates the value, but the UI never knows. It just sits there. Stale. 🔵 Stale closures in useEffect — an empty dependency array + setInterval = a timer that's frozen in time. Forever stuck at 1. 🟢 React.memo shallow trap — you wrapped your component in memo, feeling smart. But you're passing a new object literal every render. Memo does nothing. 🟣 useEffect cleanup order — most devs think cleanup only runs on unmount. Wrong. It runs before every single re-render effect. Every. Time. 🟡 Index as key — it works until you sort, filter, or reorder. Then React maps the wrong DOM to the wrong data. Inputs keep stale values. Good luck debugging that. 🔴 State mutation — you pushed to the array and called setState. React compared references. Same ref = no update. Your UI is frozen and you have no idea why. I put all 7 into a carousel with code snippets, wrong answers, correct answers, and explanations. Swipe through and test yourself honestly. The pattern? The questions that trip people up aren't about syntax. They're about understanding how React actually thinks. Save this for your next interview — whether you're giving it or taking it. --- #react #javascript #frontend #interviewprep #webdevelopment #softwareengineering #reactjs

Day 23 #100DaysOfCode 💻 #React #Module_39 1. Why is component-based architecture useful in React applications? = It allows reusable and organized UI components. 2. Which tool is used to manage states globally in React? = Redux (or Context API). 3. What is the purpose of the useEffect hook? = To handle side effects like data fetching, subscriptions, or manually changing the DOM. 4. In React, what is "JSX"? = A syntax extension that allows writing HTML-like code within JavaScript. 5. What is the use of "props" in React? = To pass data and event handlers from a parent component to a child component. 6. What is the Virtual DOM? = A lightweight representation of the real DOM that React uses to optimize updates and improve performance. 7. Which hook is used to manage local state in a functional component? = useState. 8. What is a "Higher-Order Component" (HOC)? = A function that takes a component and returns a new component with enhanced functionality. 9. How do you handle events in React? = Using camelCase syntax (e.g., onClick) and passing a function as the event handler. 10. What is the purpose of "Keys" in React lists? = To provide a stable identity to list elements, helping React identify which items have changed, been added, or removed.