Muhammad Waqas’ Post

React Render ≠ Repaint Many people think “render” means repainting the screen. In React, render means re-running the component function. What actually happens: 1. setState → schedules a re-render 2. React re-runs the component function 3. JSX is recalculated (Virtual DOM) 4. React diffs the result 5. Only then does the browser paint what changed 6. A render can happen without any repaint at all. Understanding this makes React performance and behavior much clearer. #React #JavaScript #WebDev #Frontend #LearningInPublic

🚀 Understanding useEffect in React – Simplified One of the most important hooks in React is useEffect, and how you use it depends on the dependency array 👇 🔹 useEffect(() => {}) ➡ Runs after every render ➡ Use carefully (can cause performance issues) 🔹 useEffect(() => {}, []) ➡ Runs only once (on component mount) ➡ Best for API calls, initial setup 🔹 useEffect(() => {}, [name]) ➡ Runs only when name changes ➡ Perfect for syncing state, props, or side effects #ReactJS #useEffect #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks #LearningReact

🚀 Understanding useEffect in React – Simplified One of the most important hooks in React is useEffect, and how you use it depends on the dependency array 👇 🔹 useEffect(() => {}) ➡ Runs after every render ➡ Use carefully (can cause performance issues) 🔹 useEffect(() => {}, []) ➡ Runs only once (on component mount) ➡ Best for API calls, initial setup 🔹 useEffect(() => {}, [name]) ➡ Runs only when name changes ➡ Perfect for syncing state, props, or side effects #ReactJS #useEffect #FrontendDevelopment #JavaScript #WebDevelopment #ReactHooks #LearningReact

What is Virtual DOM? 🤔 Virtual DOM is a lightweight copy of the real DOM. It compares changes, updates only what’s needed, and makes UI updates faster and more efficient. A key reason why frameworks like React are so performant 🚀 #ReactJS #VirtualDOM #WebDevelopment #Frontend #JavaScript

Optimize Re-renders with React.memo Avoid unnecessary re-renders in React functional components by using React.memo. It memoizes your component and only re-renders it when props change — great for performance! Typing in the input won’t trigger a re-render of the Child component because it’s wrapped with React.memo. Less re-render = smoother performance! #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #ReactTips #CodingTips

Here's a quick visual reminder of why React is so fast! ⚡️ The Virtual DOM acts as a lightweight blueprint. Instead of updating the slow Real DOM for every single change, React compares the new blueprint with the old one and only updates what's absolutely necessary. This "diffing" process is the key to high-performance UIs. What's your favorite way to explain this to new devs? #ReactJS #WebDevelopment #Performance #JavaScript #FrontEnd

In my last post, I explained the difference between static and dynamic routes in Next.js. This is the follow up. Once you understand what static and dynamic routes are, the next question is what actually makes a route dynamic. Here are the most common ways routes become dynamic, often without you realizing it. 👇 Which one have you run into before? #Nextjs #React #Frontend #WebDevelopment #Javascript #Typescript #ProgrammingTips

What is Nuxt.js and when should you use it? ✅ A practical breakdown for Vue developers wondering if they need Nuxt or if plain Vue is enough. #Nuxt #NuxtJS #VueJS #Vue3 #WebDevelopment #JavaScript #Frontend

What Next.js REALLY Is 🚀 Next.js = React + Rendering Control + Performance React decides how UI updates. Next.js decides where & when it renders. You can mix: • SSG → fastest • ISR → fast + fresh • SSR → dynamic • CSR → interactive 💡 Rule: Render as early as possible, hydrate only when needed. #NextJS #ReactJS #WebPerformance #FrontendEngineering #JavaScript