Gourav Jadhav’s Post

🚀 React 19 just made our code cleaner! Did you know forwardRef is no longer needed in React 19? ✅ ref is now just a regular prop — no wrapper, no extra imports, no boilerplate! I recorded a short video breaking it down with a real example — triggering a Child button from a Parent using ref. 🎥 Watch the video to see it in action 💻 Code is live on my GitHub — link in comments! #React #React19 #JavaScript #Frontend #WebDevelopment #Programming #100DaysOfCode Small change, big improvement in developer experience. Love where React is heading! 💙

A senior dev once reviewed my React app and said: "Your code is clean. But you're punishing your users." I had no idea what he meant — until he showed me the bundle size. 5.2MB of JavaScript. Loaded all at once. Every. Single. Visit. That day I learned: ✂️ Code Splitting — break JS into small chunks, load only what's needed 🌳 Tree Shaking — strip out dead code before it ever reaches the browser I went from 5MB → 900KB. Load time dropped from 11s → 2s. I turned those lessons into a simple visual carousel with code examples. Swipe to learn both 👉 —— 💾 Save this before your next PR. ♻️ Share with a dev who ships slow bundles. #JavaScript #React #WebDev #FrontendDevelopment #Performance #Programming

Understanding State and Props in React (Simple Explanation) If you are learning React, two concepts you must understand early are state and props. Props: Props are used to pass data from a parent component to a child component. They are read-only, which means the child cannot modify them. Example: A parent sends a user name to a child component. The child just displays it. State: State is used to store data inside a component. Unlike props, state can change over time. Example: A counter that increases when you click a button uses state. Key Difference: Props are external and immutable. State is internal and mutable. In simple words: Props = Data coming from outside State = Data managed inside the component Understanding this difference helps in building better and scalable React applications. #ReactJS #FrontendDevelopment #SolGuruz #WebDevelopment #JavaScript #Programming #SoftwareEngineering

⚛️ One thing that improved my React code significantly: Understanding when and why components re-render. In React, a component re-renders when: • Its state changes • Its props change • Its parent component re-renders Early in my projects, I didn’t think much about this. But as applications grow, unnecessary re-renders can affect performance. Some things that helped me manage this better: 🔹 Using React.memo for pure components 🔹 Memoizing functions with useCallback 🔹 Memoizing expensive calculations with useMemo But an important lesson: Premature optimization can make code harder to maintain. First build clean components. Optimize only where performance actually matters. React performance is less about tricks and more about understanding how rendering works. #ReactJS #FrontendDevelopment #ReactPerformance #JavaScript #SoftwareEngineering Ankur Prajapati MOHD ALI ANSARI Sheryians Coding School

In the world of web development, it’s tempting to jump straight into flashy frameworks like React or Next.js. But lately, I’ve realized that a house is only as strong as its foundation. I’m currently diving deep into JavaScript Fundamentals, and it’s been a game-changer. Re-learning the "why" behind things like Scope and Hoisting, Closures, Asynchronous patterns and so on. Mastering the fundamentals isn't a step backward; it’s the fastest way to move forward. If you understand the core of the language, the frameworks become easy to learn. Are you a "fundamentals first" developer, or do you prefer learning on the fly?

TypeScript protects you while coding. Not when your app is live. Your API returns this: { "name": "John", "age": "twenty", "email": null } TypeScript sees no problem. Your app breaks silently. Without Zod: - You trust the API blindly - Bad data enters your system - Bugs are painful to trace With Zod: - Data is validated the moment it arrives - Invalid fields are caught instantly - TypeScript types are generated automatically What you wanted: { "name": "John", "email": "john@gmail.com" } What you received: { "name": "John", "email": null } What Zod does: throws error immediately. Nothing slips through. One schema. Full runtime safety. Zero surprises. #TypeScript #Zod #WebDevelopment #JavaScript #SoftwareEngineering #DevTips #BuildInPublic #Programming

While learning React, I recently explored what happens behind the scenes when the UI updates the concept of Reconciliation and the Diffing Algorithm. When a component’s state or props change, React does not immediately update the real DOM. Instead, it creates a new Virtual DOM tree and compares it with the previous one. This comparison process is called Diffing. React checks what actually changed between the two trees and then updates only those specific parts in the real DOM instead of re-rendering everything. This process of efficiently updating the UI is known as Reconciliation. For example, if only a text value changes inside a <p> tag, React updates just that node rather than rebuilding the entire DOM structure. This makes React applications fast and efficient. A couple of interesting things React assumes to make this process quicker: • Elements with different types create different trees • Keys help React track items in lists efficiently Understanding how React updates the DOM internally really helped me see why things like keys and component structure matter for performance. #React #JavaScript #WebDevelopment #FrontendDevelopment #ReactJS #Programming #LearningInPublic

Code doesn’t run by itself. Something runs it for you. 👉 That “something” is called a runtime. It’s the layer between your code and your system. It handles: - Execution - Memory - Communication with the system You don’t see it. But it’s always there. Examples: - Your browser runs JavaScript - Node.js runs backend code - Android runtime runs apps Without a runtime… your code is just text. You click → runtime executes → you see result. This is Part 5 of the series. Tomorrow: how everything connects into one full system. Follow if you want to understand how software actually works behind the scenes. #Programming #Coding #SoftwareDevelopment #WebDevelopment #JavaScript #Nodejs #TechExplained #Developers #ComputerScience

React just made your code cleaner — without you changing a thing. React Compiler (v1.0) is officially stable. It automatically handles what `useMemo`, `useCallback`, and `React.memo` used to do manually. No more dependency array headaches. No more wrapping every function and component. Just write React — the compiler optimizes it for you. Already running in Meta's production with 12% faster load times and 2.5× smoother interactions. This is the biggest quality-of-life upgrade React developers have gotten in years. `#ReactJS` `#MERN` `#WebDevelopment` `#JavaScript` `#Frontend` `#React19` `#Programming`

🔢 Day 21 — JavaScript 30 Days Challenge Day 21 complete — built an Even or Odd Checker App using Vanilla JavaScript. The app takes a number as input and instantly determines whether the number is even or odd. It’s a small utility, but great for practicing fundamental programming logic. Features include: • Number input field • Instant even/odd detection • Clear result display • Basic input validation Sometimes the simplest logic problems are the best way to strengthen programming fundamentals. This project focuses purely on clean logic implementation. Code pushed to GitHub + Live hosted in ReadMe file on GitHUb (GitHub link in Profile section). Day 21 done. Closing in on the final stretch. 🚀 #JavaScript #WebDevelopment #FrontendDevelopment #30DaysOfCode #JavaScriptProjects #BuildInPublic #CodingJourney