Day 4: Functional vs Class Components In React, there are two main types of components: 1️⃣ Functional Components 2️⃣ Class Components Let’s understand the difference. 📌 Functional Components A Functional Component is simply a JavaScript function that returns JSX. Example: function Welcome() { return <h1>Hello React</h1>; } With the introduction of React Hooks, functional components can now handle state, lifecycle methods, and side effects. That’s why modern React applications mostly use Functional Components. 📌 Class Components A Class Component is a JavaScript class that extends React.Component. Example: import React, { Component } from "react"; class Welcome extends Component { render() { return <h1>Hello React</h1>; } } Before React Hooks, class components were used to manage state and lifecycle methods. 📌 Key Differences • Functional components use functions • Class components use ES6 classes • Functional components use Hooks (useState, useEffect) • Class components use lifecycle methods 📌 Which one should you use today? 👉 Functional Components They are: ✅ Simpler ✅ Easier to read ✅ Less boilerplate code ✅ Officially recommended in modern React #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #CodingJourney #LearnInPublic
React Components: Functional vs Class
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💡 React Tip: Use Custom Hooks to Reuse Logic One pattern I use frequently in React projects is custom hooks. Instead of repeating API logic across components, I move it into a reusable hook. Example 👇 function useFetch(url) { const [data, setData] = useState(null); useEffect(() => { fetch(url) .then(res => res.json()) .then(setData); }, [url]); return data; } Usage: const users = useFetch("/api/users"); Benefits: • Cleaner components • Reusable logic • Easier testing Custom hooks are one of the most powerful patterns in React. What’s your favourite custom hook? #ReactJS #FrontendDevelopment #JavaScript
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Back to Basics: Building a High-Performance Project in Vanilla JS! Recently, I worked on a project with a very specific client requirement: No Frameworks. Just Vanilla HTML, CSS, and JavaScript. Coming from a React.js background, where everything is component-based and state-managed, going back to the basics was both a challenge and a massive learning experience! Here’s what I realized during this build: The "Manual" Struggle: Managing the DOM manually and handling state without hooks like useState or useEffect definitely feels more "boring" and time-consuming at first. Optimization is a Real Test: Without React’s Virtual DOM, optimizing for speed and performance in plain JS is much harder. It forced me to write cleaner, more efficient scripts to keep the UI snappy. The Power of Control: While React makes everything "easy," Vanilla JS gives you absolute control over every single pixel and event listener. The Lesson? Frameworks like React are productivity powerhouses, but a strong grip on the fundamentals is what makes a developer truly "Future-Proof." It was a great experience delivering exactly what the client needed while sharpening my core engineering skills. Developers, do you think we rely too much on frameworks today? Let’s talk in the comments! 👇 #WebDevelopment #VanillaJS #JavaScript #CodingFundamentals #ClientSuccess #MERNStack #SoftwareEngineering #CareerGrowth
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💡 React Tip: Why Functional Components Are the Standard Today When I started working with React, class components were widely used. But over time, functional components have become the preferred approach — especially with the introduction of React Hooks. Here are a few reasons why developers prefer functional components today: ✅ Cleaner and simpler code – Less boilerplate compared to class components ✅ Hooks support – Hooks like useState, useEffect, and useMemo make state and lifecycle management easier ✅ Better readability – Logic can be grouped by functionality instead of lifecycle methods ✅ Improved performance optimization – Tools like React.memo and hooks make optimization easier Example: function Counter() { const [count, setCount] = React.useState(0); return ( <button onClick={() => setCount(count + 1)}> Count: {count} </button> ); } Functional components combined with Hooks make React development more scalable, maintainable, and easier to reason about. 📌 Curious to know from other developers: Do you still use class components in production projects, or have you fully moved to functional components? #ReactJS #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks
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Mastering React JS starts with strong fundamentals 🚀 Before jumping into advanced concepts, every developer should clearly understand these core basics: 🔹 Components (Functional & Class) The building blocks of any React application. Everything in React is a component. 🔹 JSX (JavaScript XML) Allows you to write HTML-like code inside JavaScript, making UI development more intuitive. 🔹 Props (Passing Data) Used to pass data from one component to another — enabling reusability and clean architecture. 🔹 State (Managing Data) Handles dynamic data inside components and controls how the UI updates. 💡 Key Insight: A strong understanding of these fundamentals makes learning advanced topics like Hooks, State Management, and Performance Optimization much easier. 📌 Don’t rush into advanced React — build a solid foundation first. What concept helped you understand React better? 👇 #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering
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🚀 Day 15/100 – #100DaysOfCode Today I focused on core React concepts that are essential for building modern frontend applications. Here are the key topics I explored: 🔹 What is React? ReactJS is a JavaScript library for building user interfaces, especially for creating fast and interactive single-page applications (SPA). It allows developers to build reusable UI components and manage application state efficiently. 🔹 Components Components are the foundation upon which we build user interfaces (UI). Also, a React component is simply a JavaScript function that returns JSX and its name must start with a capital letter. By combining multiple components, we can build complex user interfaces in a structured way. 🔹 JSX (JavaScript XML) JSX is a syntax extension for JavaScript that allows developers to write HTML-like code inside JavaScript files. It makes UI code more readable and easier to maintain. 🔹 Functional Rendering In React, the UI is treated as a function of data. Instead of manually manipulating the DOM, components describe what the UI should look like based on the current data or state. This approach makes applications more predictable, reusable, and easier to maintain. #Day15 #100DaysOfCode #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #MERNStack #SoftwareEngineering
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One React Hook changed the way I build dynamic forms. And honestly, it saved me from a lot of messy code. Before using useFieldArray in React Hook Form, I used manual state for dynamic fields. At first, it looked manageable. But as the form started growing, the logic became messy very quickly. Adding fields, removing fields, keeping values in sync, and handling validation started taking more effort than expected. The feature was simple, but the code was not. Then I started using useFieldArray. That is when I understood how useful this hook is in real projects. It makes dynamic form handling much cleaner. Add and remove actions become easier. The structure feels more organized. And the code becomes easier to maintain. For me, the biggest lesson was simple: Sometimes a problem feels difficult not because it is truly hard, but because we are solving it in a harder way. If you work with dynamic forms in React, this hook is worth understanding deeply. What React Hook made your code noticeably cleaner? #ReactJS #JavaScript #FrontendDevelopment #ReactHookForm #SoftwareEngineering #WebDevelopment #NextJS
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A lot of people constantly ask me what React Hooks actually are, and the best way to think about Hooks and JavaScript concepts in general is to look at what problem they were trying to fix. For example, before React Hooks, people would create a Container Component and a Presentational Component. The Container Component would retrieve data, like making a fetch request, and then pass that data down to the Presentational Component, which was usually a pure function that returned some UI, like a div with styling, and accepted that data as props. This pattern helped create a standard for how data was retrieved in React and enforced separation of concerns, but it ended up being too boilerplate heavy for most people. So Hooks were introduced to let us hook into components directly, allowing us to load data as a side effect inside a function while still maintaining separation of concerns without needing extra components. #ReactJs #JavaScript #JavaScriptHooks
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🚨 I see developers jumping straight into React and Next.js — and struggling to debug the simplest bugs. Here's the uncomfortable truth: 👉 React is just JavaScript. 👉 Next.js is just JavaScript. 👉 Every framework you'll ever use... is just JavaScript. If your JS fundamentals are weak, you're building on sand. 🏚️ Here's what actually happens when you skip the basics: ❌ You copy-paste code without understanding it ❌ You can't debug — only Google ❌ Every new framework feels like starting from zero But when you master JS fundamentals first: ✅ Closures → you understand React hooks ✅ Event loop → you understand async/await & API calls ✅ Prototypes → you understand how JS objects really work ✅ Array methods → you write cleaner, readable React components Frameworks come and go. JavaScript stays. Invest time in the fundamentals. Your future self — and your teammates — will thank you. 🙌 ───────────────── 💬 Drop a comment: What JS concept clicked everything into place for you? #JavaScript #WebDevelopment #React #NextJS #Frontend #100DaysOfCode
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The frontend stack is a lie. Not entirely. But hear me out. Ten years ago you wrote HTML, CSS, and JavaScript. You shipped a file. Users opened it. Done. Today you need a bundler, a transpiler, a type checker, a linter, a formatter, a component framework, a state manager, a data fetching layer, a router, a testing framework, and a CI pipeline to glue it all together. And every six months half of that gets replaced. Here's what nobody admits: Most of that complexity doesn't solve user problems. It solves developer problems created by the previous tool that was supposed to solve developer problems. Babel existed because browsers were slow to adopt ES6. Webpack existed because browsers had no native modules. Create React App existed because Webpack was too hard to configure. Vite existed because CRA was too slow. Turbopack exists because Vite isn't fast enough at scale. That's five tools solving the same problem in sequence. Each one genuinely better than the last. Each one adding a new mental model to maintain. The part that actually matters: None of this is inherently bad. Abstraction is how we build complex things. The problem is when the stack becomes the goal — when engineers spend more time configuring tooling than shipping features. I've worked in codebases where onboarding took two weeks just to understand the build pipeline. Not the product. The build pipeline. What I actually do now: I question every layer. Not with nostalgia — I'm not going back to vanilla JS for a production app. But with a real question: does this tool reduce complexity for the user, or just for me? If it's only for me, I'd better be sure it's worth the tradeoff. The best stack is the one your team stops thinking about. #frontend #javascript #webdevelopment #softwareengineering #react
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