Optimizing React Components with useMemo and useCallback

Introducing SuperForm – A TypeScript-First Form Validation Library for React I am excited to announce the initial public release of SuperForm, a lightweight, TypeScript-first validation and form state management library for React. SuperForm is designed to make form handling fast, intuitive, and fully typed. Key Features: - TypeScript-First: Full type inference from your schemas, no manual types required. - Zod-Like Syntax: Intuitive, chainable schema builder. - Comprehensive Validation: Strings, numbers, booleans, objects, and arrays. - Async Validation: Built-in support for async rules (e.g., checking if a username is taken). - React Integration: Lightweight hooks (useForm, useField) for effortless form state management. - Zero Dependencies: Optimized for performance. Installation: - npm install @silentcoderhi/superform - or - yarn add @silentcoderhi/superform Try it out: Define schemas, validate forms, and manage state effortlessly in React projects. This library is open-source and contributions are welcome! Check it out on npm: https://lnkd.in/dxPkZtxN #React #TypeScript #OpenSource #WebDevelopment #npm #FormValidation #SuperForm #Frontend #JavaScript

Most React dev has wasted hours building tables from scratch. Sorting, filtering, pagination... same struggle every time 😅 Recently came across react-table-craft and a few things stood out: ● Headless design - your styles, their logic. No CSS fights. ● Global config - set once, override anywhere. Way less prop drilling. ● Built-in virtualization - 10k rows, still fast. Only renders what's visible. Solid architecture whether you use the library or not. #React #JavaScript #FrontendDevelopment #WebDev #OpenSource #Programming #BuildInPublic #SoftwareEngineering #Developer #TechCommunity

Day 19 of #30DaysOfJavaScript: Built a Simple Notes App! Started with a clean architecture. DOM elements mapped to variables for easy reference. Implemented CRUD operations: create notes with unique IDs (using timestamp + random string), open/edit existing notes, save to localStorage, and delete with confirmation. Real-time search filters notes by title and content using .includes() and .toLowerCase(). Built XSS protection by sanitizing HTML special characters before rendering to prevent injection attacks. Keyboard shortcuts added for power users Ctrl+N creates a note, Ctrl+S saves instantly. Used event delegation and localStorage API for persistent data storage across sessions. Every note tracks its updatedAt timestamp. The UI shows live previews with metadata. Pure vanilla JS—no frameworks, no dependencies. Fast, lightweight, and production-ready. Live: https://lnkd.in/dmsPwaJp #JavaScript #WebDevelopment #FrontendCoding #30DaysOfJS #VanillaJS #localStorage #Netlify

The most significant architectural shift in Vite’s history. 🛠️ Vite 8 marks the end of the "Pragmatic Bet." For years, we relied on esbuild for dev and Rollup for production. It worked, but it created an architectural "gap." With the stable release of Rolldown, that gap is closed. Key Technical Highlights: 1️⃣ Unified Pipeline: A single Rust-based bundler handles everything from dependency pre-bundling to production chunks. 2️⃣ Oxc Integration: @vitejs/plugin-react v6 now swaps Babel for Oxc, making React Refresh transforms near-instant. 3️⃣ Memory Efficiency: Early reports show up to a 100x reduction in memory usage for massive monorepos. 4️⃣ Wasm SSR: Finally, native support for .wasm?init in server-side rendering. The Catch? You’ll need Node.js 20.19+ and about 15MB more disk space for the Rust binaries. A small price to pay for a 30x performance boost. The VoidZero ecosystem is officially consolidating the JS toolchain. Is Rust the final destination for web tooling? Let's discuss. #ViteJS #WebDev #RustLang #Programming #Frontend #JavaScript #SoftwareEngineering

I remember spending so much time manually managing re-renders in React — wrapping everything with useMemo, adding useCallback everywhere, and constantly asking myself: “Did I optimize this correctly?” Performance optimization often felt like a full-time job. One small change in a component could trigger unnecessary re-renders, and suddenly you’re deep in dependency arrays trying to keep everything stable. Now with the React Compiler, things are changing. Instead of relying on developers to manually optimize with hooks like useMemo and useCallback, the React Compiler works as a build-time tool that automatically analyzes and optimizes your code. It understands your component logic and handles many of the performance optimizations for you — without you having to sprinkle memoization everywhere. This is a big shift. It moves the responsibility of performance tuning from the developer to the tool itself. In other words, we focus more on writing clean, expressive React code — and the compiler takes care of optimizing it behind the scenes. Less boilerplate. Less mental overhead. More focus on product and logic. But the real question is: Will this make React feel “too magical”… or is it a long-overdue evolution of how we build UI? #reactCompiler #javaScript

Stop overusing useEffect: 3 patterns for cleaner React code in 2026! While useEffect is one of the most powerful hooks in React, it’s also the most misused. Many developers use it to sync state, leading to unnecessary re-renders and "spaghetti code." In my recent projects, I’ve been focusing on writing more predictable components by following these 3 patterns: 1) You might not need an effect for data transformation If you can calculate something from existing props or state, do it during rendering. - Don't: Use an effect to update a filteredList state when items change. - Do: Use useMemo or just a plain variable during render. It’s faster and simpler. 2) Action handlers over effects If a state change is triggered by a specific user event (like a button click), put that logic in the event handler, not in a useEffect watching the state. It makes the data flow much easier to trace. 3) Lifting State Up vs. Context API Don’t jump straight to Context for everything. Start by lifting state up to the nearest common ancestor. Only move to Context or state management libraries when the prop-drilling actually hurts scalability. The goal? Leaner components, better performance, and easier debugging. What’s a React "bad habit" you’ve recently broken? Let’s share some clean code tips below👇 #ReactJS #TypeScript #WebDevelopment #SoftwareArchitecture #CleanCode #FrontendEngineering #TorontoTech #MERN

Node.js Architecture: Under the Hood 🚀 Ever wondered how Node.js handles massive traffic with a single thread? Most people think Node.js is slow because it’s single-threaded but the reality? It’s smartly designed for performance. ⚙️ Step 1: Built on: → Chrome V8 (executes JavaScript) → C++ Runtime (system-level bindings like fs, http) → Libuv (handles async I/O & thread pool) 🧵 Step 2: Main Thread Execution → Your code runs on a single main thread (call stack) → Sync code executes immediately → Async tasks are delegated to Libuv 🔁 Step 3: The Real Hero: Event Loop Starts It efficiently manages execution through phases: Timers → Pending Callbacks → I/O Polling → Check (setImmediate) → Close ⚡ Step 4: Smart Offloading → Expensive tasks (file I/O, crypto, DNS) go to worker threads (thread pool) → Main thread stays free (non-blocking 🚀) 📥 Step 5: Callback Execution → Completed tasks return to callback queue → Event loop pushes them back to main thread for execution 💡 While the main thread stays non-blocking, heavy tasks are offloaded to worker threads (libuv thread pool) Special thanks to Piyush Garg Sir for introducing these concepts in such a simple and practical way 🙏 #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #EventLoop #AsyncProgramming #SystemDesign #V8Engine #Libuv #Coding #Developers #TechCommunity Hitesh Choudhary #chaicode

The fastest UI frameworks today don’t rely on a virtual DOM — and that might not be a coincidence ⚡ Gea just topped the js-framework-benchmark with a 1.03 score, outperforming Solid, Svelte, Vue, and React by compiling ordinary JavaScript classes into precise DOM updates at build time. No signals. No hooks. No new reactive primitives to learn. You write a class with state and methods. The compiler traces dependencies statically and wires direct DOM mutations before your app even runs 🧠 The entire framework (including routing) ships at ~13kb gzipped with zero runtime dependencies 📦 It raises an interesting question: How much of modern frontend complexity exists because we optimized around runtime constraints that no longer apply? If compilers can now generate surgical UI updates ahead of time… what other “core” abstractions might turn out to be optional? 🤔 https://geajs.com/ #JavaScript #WebDevelopment #Frontend #Performance #DX

Why the idea that var is more performant than let/const still appears — and why it`s misleading From time to time I still see claims that var should be preferred over let and const because it is faster and widely used in popular libraries. This sounds convincing, but in modern JavaScript it is mostly a myth. In real applications, performance differences between var, let, and const are negligible. Modern engines like V8 and SpiderMonkey optimize scope access heavily. In browsers, var can even be slower in some cases, because top-level var becomes a property of the global object, and accessing object properties may cost more than accessing block-scoped variables. Another common argument is that large libraries use var. But people often look at compiled dist bundles instead of source code. Those files are transpiled, minified, and optimized for compatibility. If you check real sources of major projects, you will see the opposite: Angular, React, Vue, Node.js core, and the TypeScript compiler all use const and let in their codebases. var usually appears only after build tools process the code. Style guides also make this clear. Google, Mozilla, and Airbnb recommend using const by default, let when needed, and avoiding var completely because of function scope, hoisting quirks, and risk of accidental globals. The bigger lesson here is not about var itself. In engineering, it`s easy to believe statements like "this is faster" "libraries do it this way" "this is how professionals write code" But without checking the source and measuring real performance, those claims can be wrong. Today we have TypeScript, Babel, SWC, and other tools that can generate whatever output is needed. Developers should write clear and safe code using const and let, and let the compiler handle low-level optimizations. #JavaScript #TypeScript #WebDevelopment #Frontend #SoftwareEngineering #CleanCode #CodingStandards #DeveloperExperience #Programming #FrontendArchitecture

Quick update on ngx-transforms the reverse pipe now handles arrays. Before, it only reversed strings. Now it does both:  {{ 'Hello' | reverse }} → 'olleH'  {{ [1, 2, 3, 4, 5] | reverse }} → [5, 4, 3, 2, 1]  {{ ['a', 'b', 'c'] | reverse }} → ['c', 'b', 'a'] It never mutates the original array. Spread + reverse under the hood, so Angular's change detection stays happy. This was a small change, but it came from a real need sorting UI lists, reversing timelines, and flipping table rows. Things you'd normally write a one-off helper for. Now it's just a pipe. npm i ngx-transforms https://lnkd.in/dRYZts_V If you find this useful, a star on the repo helps other developers find it. #Angular #TypeScript #OpenSource #WebDevelopment #Frontend