💡 What is onChange in React? In React, onChange is used to handle user input in real-time. 👉 When user types… onChange triggers a function 👉 That function updates State 👉 State updates → UI updates instantly 📌 Common Uses: • Form inputs • Live search • Validation • Dynamic UI updates ⚡ onChange is the key to building interactive forms in React. 💡 Tip: Always connect input with State for controlled components. Follow TFSC for practical frontend learning. #reactjs #onchange #reactevents #frontenddeveloper #javascript #webdevelopment #coding #learnreact #programming #tfsc

🚀 React Series - Day 3 State - The Reason React Apps Feel Alive Static UI is boring - users expect interaction. That’s where state comes in. State allows components to store data that can change over time, such as: • Button clicks • Form inputs • Toggle switches Whenever state changes, React automatically updates the UI. This is what makes React applications feel dynamic and responsive. 👉 In modern React, state is usually managed using the useState hook. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

🚀 React Series – Day 7 Rendering Based on Conditions (Making UI Smarter) Not every part of the UI should always be visible. Sometimes, what users see depends on certain conditions. React allows this through conditional rendering. Common approaches include: • Using if/else statements • Ternary operators • Logical && For example, showing a dashboard only when a user is logged in. 👉 This makes applications more dynamic and improves user experience by displaying only relevant content. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

🚀 React Series – Day 6 Handling User Actions in React (Events Made Simple) User interaction is at the heart of every application - clicks, typing, form submissions. In React, handling these actions is straightforward and similar to JavaScript, with a few small differences. Events are written in camelCase, such as: • onClick • onChange • onSubmit Instead of writing inline logic, it’s better to pass a function as a handler. This keeps the code clean and maintainable. 👉 One small but important detail: always pass the function reference, not the function call. This approach helps React efficiently manage user interactions and update the UI accordingly. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

Building My Own Reusable Star Rating Component in React As part of my journey learning React, I decided to stop relying on external npm packages for simple UI features (For security and Reliability reasons) and instead build them from scratch. One of the components I built recently is a fully reusable Star Rating component Features I implemented: - Configurable number of stars (max) - Controlled and uncontrolled rating support - Click interaction to set rating - Custom colors support (border, fill, shadow) - Reset / clear rating option - Callback function triggered when the user selects a rating, passing the updated rating value as an argument , this is helpfull for external handling (e.g: state sync with parent components) - Fully reusable design #React #JavaScript #FrontendDevelopment #WebDevelopment #LearningInPublic #Programming #UI #CleanCode

🚀 Just dropped: TypeScript 6.0 This isn’t just another update… 👉 It’s the final version built on the current system 👉 TypeScript is moving to a brand new, ultra-fast Go-based engine next (v7.0) 👉 Meaning: massive performance boost is coming soon 💡 Translation for non-devs: The tool behind most modern web apps is getting a major speed upgrade from the core And the crazy part? TypeScript 7.0 is almost ready already. Big shift happening behind the scenes of the internet 👀 Link in the comment ⸻ #TypeScript #JavaScript #WebDevelopment #Programming #SoftwareDevelopment #Developers

🚀 React Series - Day 10 Avoiding Unnecessary Re-renders with React.memo As applications grow, performance becomes more important. One common issue is unnecessary re-rendering of components. This is where React.memo helps. It is a higher-order component that memoizes a component - meaning it will only re-render if its props actually change. If the props remain the same, React skips rendering that component, improving performance. 👉 This is especially useful for components that: • Receive the same props frequently • Are part of large or complex UIs Used correctly, it can make applications faster and more efficient. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

🚀 React Series - Day 5 useEffect - Making React Work with the Outside World Not everything in an app is just UI rendering. Sometimes you need to: • Fetch data from APIs • Run logic after rendering • Set up timers or listeners This is where useEffect is used. It runs after a component renders and allows you to handle these “side effects” cleanly. With the dependency array, you can control when it runs: • Empty array → runs once • With values → runs when those values change 👉 It’s a key concept for handling real-world app behavior in React. #reactjs #javascript #frontenddeveloper #webdevelopment #codinginterview #learnreact #30daysofcode #programming #reactinterview #react #coding

🧠 If you're overusing "useEffect", you're probably doing it wrong. This hook is powerful — but also one of the most misused things in React. Here’s what I see often 👇 ❌ Missing dependency array → unexpected behavior ❌ Adding everything to dependencies → infinite loops ❌ Using useEffect for derived state → unnecessary complexity ✅ Use it only for side effects: - API calls - Subscriptions - DOM interactions --- 💡 Rule of thumb: “If it can be calculated during render, don’t use useEffect.” --- 👀 Let’s discuss: 👉 What’s the most confusing part of useEffect for you? 👉 Have you ever debugged an infinite loop issue? 😅 Drop your thoughts 👇 #ReactJS #Frontend #JavaScript #WebDev #Programming

React feels fast because it usually updates only what changed. That is reconciliation. When state changes, React creates a new Virtual DOM tree, compares it with the previous one, finds the difference, and updates only the affected part of the real DOM. That is the reason React apps can stay efficient without you manually touching every DOM node. The infographic shows the full flow step by step, from state change to browser repaint. What React concept should I simplify next? #React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #VirtualDOM #Programming #SoftwareEngineering