React API Fetching with useEffect and useState

💡 Do you really understand useEffect in React? In React, not everything is about rendering. Fetching data from an API, manipulating the DOM, or using setTimeout are all side effects — and that’s exactly what useEffect is for. 👉 There are 3 main ways to use useEffect: 🔹 Without a dependency array Runs on every render 🔹 With an empty array [] Runs only once, when the component mounts Perfect for initial API calls 🔹 With dependencies [state] Runs only when that specific state changes Great for reacting to controlled updates (theme, language, data, etc.) ⚠️ Don’t forget about cleanup If you add listeners, intervals, or timeouts, clean them up to avoid memory leaks. ✨ Mastering useEffect is key to writing predictable, performant, and professional React code. #ReactJS #FrontendDevelopment #JavaScript #WebDev #Hooks #CleanCode #ProgrammingTips

⚛️ useMemo vs useCallback in React In React, every re-render: 👉 Recalculates values 👉 Recreates functions This is normal behavior — but in large apps, it can lead to ❌ Performance issues ❌ Unnecessary child re-renders That’s where useMemo and useCallback come into play 👇 🟢 useMemo – remembers a VALUE Use it to cache the result of an expensive calculation so React doesn’t recompute it on every render. ✔ Filtering large lists ✔ Sorting data ✔ Derived values from state/props ✔ Heavy computations It recalculates only when its dependencies change, keeping your UI fast and efficient. 🔵 useCallback – remembers a FUNCTION Use it to cache a function reference, especially when passing functions to child components. ✔ Prevent unnecessary child re-renders ✔ When child components are wrapped with React.memo ✔ Stable event handlers ✔ Optimizing large component trees Major Difference: useMemo → stores a computed value useCallback → stores a function reference useCallback(fn, deps) === useMemo(() => fn, deps) #ReactJS #useMemo #useCallback #ReactHooks #JavaScript #FrontendDeveloper #WebDevelopment #PerformanceOptimization

Today was a great, i deepened my understanding of Client Side vs Server Side, and also explored modern data fetching patterns in React. Here are some key things I learned today: * How and when to use useEffect for data fetching * Introduction to modern React async patterns like use() and Suspense *How form handling works in React using onSubmit and FormData *The difference between normal React forms, Router forms, and Server Actions One thing I’m realizing is that learning React is not just about components — it’s about understanding how data flows, where code runs, and how users interact with apps. Step by step, getting better every day 💻✨ #React #WebDevelopment #FrontendDeveloper #LearningInPublic #JavaScript #SoftwareDevelopment #TechJourney #ReactJS #CodingLife #BuildInPublic

🚀 7 Days of Better React – Day 4 Old Approach → Better Approach Faced a common issue while working with a search input. Every keystroke was triggering an API call. ❌ Old approach: useEffect(() => { fetchResults(query); }, [query]); This hits the API on every key press. ✅ Better approach (Debouncing): useEffect(() => { const timeout = setTimeout(() => { fetchResults(query); }, 500); return () => clearTimeout(timeout); }, [query]); Now the API call only happens after the user stops typing. Better performance. Fewer unnecessary requests. Better user experience. Optimization isn’t always complex. Sometimes it’s just controlling timing. #reactjs #frontenddeveloper #javascript #performance #webdevelopment

Day 8 of my Next.js journey 🚀 Today was all about turning backend logic into real, user-facing features. Here’s what I worked on 👇 ✅ Built Create Question server action ✅ Created and tested question submission flow ✅ Implemented Edit Question functionality ✅ Tested update logic properly Then focused on the Home Page 👇 ✅ Fetched questions from the database ✅ Displayed them dynamically ✅ Implemented proper UI states     • Loading     • Empty state     • Data rendered state Big takeaway 💡 Building features isn’t just about writing logic — it’s about connecting database → server action → UI → user experience smoothly. Seeing questions flow from submission to homepage made the app feel real. Huge shoutout to JavaScript Mastery 🙌 Momentum continues 🔥 What do you think is more challenging — backend logic or handling clean UI states? #NextJS #FullStackDevelopment #ServerActions #WebDevelopment #LearningInPublic #JavaScript #JSMastery

🚀 React Series – Day 12: useState Hook First React Hook 📌 Title useState Hook 📖 Definition The useState hook allows functional components to manage and update state. It helps make components dynamic by storing data that can change over time. ✨ Features / Uses Manages dynamic data inside components. Triggers re-render when state updates. Makes functional components powerful and interactive. Simplifies state management compared to class components. 💻 Coding Example const [count, setCount] = useState(0); 🧠 Explanation Here, count is the current state value and setCount is the function used to update it. Whenever we update the state using setCount, React automatically re-renders the component to reflect the new value in the UI. Learning React step by step and strengthening my fundamentals every day 💪 #ReactJS #useState #ReactHooks #FrontendDevelopment #WebDevelopment

Just finished building a Todo App as part of strengthening my React fundamentals. Tech stack used: =>React =>Context API =>Hooks (useState, useEffect) =>Component-based architecture What I focused on: =>Managing global state with Context API =>Clean and reusable components =>Implementing basic CRUD functionality =>Writing readable and maintainable code This project helped me better understand how state flows in real React applications and why structure matters as apps scale. 🔗 GitHub Repository: https://lnkd.in/dzeNy2bd #React #JavaScript #WebDevelopment #FrontendDeveloper #LearningInPublic

One important concept every React developer must truly understand: State management In React, state is what drives your user interface. It determines what users see, how components update, and how data flows across your application. Poor state management leads to: • unpredictable UI behavior • unnecessary re-renders • hard-to-maintain code But when state is handled correctly using tools like useState, useEffect, lifting state up, or Context your application becomes cleaner, more scalable, and easier to reason about. React development isn’t just about building components. It’s about thinking in state and data flow. Still learning. Still building. #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #LearningInPublic

After 3 years of working with React and Next.js, one important lesson I’ve learned about state management is: Redux is powerful — but it should be used wisely. Why use Redux? Redux is a great choice when your application has: Complex and large-scale state Data that needs to be shared across multiple components or pages Multiple API calls with loading and error handling A need for predictable state flow with a single source of truth Easier debugging using Redux DevTools In larger projects like dashboards or applications with user sessions, global data, and frequent updates, Redux Toolkit makes state management much cleaner and more scalable. Cons of Redux From practical experience, Redux also comes with some challenges: Extra setup and initial configuration Can feel like overkill for small or medium projects Adds complexity if the state is simple Slight learning curve for beginners More code compared to local state or Context API My takeaway Use Redux when your application actually needs global and complex state. For smaller apps, tools like useState, useReducer, or Context API might be simpler and more efficient. Good development is not about using the most powerful tool — it’s about choosing the right tool for the problem. What do you prefer for state management in your projects — Redux, Context API, or something else? #React #Redux #ReduxToolkit #FrontendDeveloper #NextJS #JavaScript #WebDevelopment #SoftwareEngineering