React 2026: Async-First, Cleaner Architecture

Most developers know the Event Loop. Few understand its priority model. JavaScript doesn’t just “run async code.” It runs it through two distinct queues: • Microtasks (high priority) • Macrotasks (lower priority) And the rule is absolute: All microtasks run before even ONE macrotask. That means: Promises always beat setTimeout. Async/await always beats timers. This isn’t trivia. This is the scheduling policy of the entire runtime. Architects don’t just write async code. They design around the scheduler. Follow Muhammad Nouman for more useful content #JavaScript #React #Frontend #EventLoop #SystemDesign #AsyncProgramming #SoftwareArchitecture #JSInternals

Most developers know the Event Loop. Few understand its priority model. JavaScript doesn’t just “run async code.” It runs it through two distinct queues: • Microtasks (high priority) • Macrotasks (lower priority) And the rule is absolute: All microtasks run before even ONE macrotask. That means: Promises always beat setTimeout. Async/await always beats timers. This isn’t trivia. This is the scheduling policy of the entire runtime. Architects don’t just write async code. They design around the scheduler. #JavaScript #React #Frontend #EventLoop #SystemDesign #AsyncProgramming #SoftwareArchitecture #JSInternals

🤯 This JavaScript snippet will catch you off guard... const obj = {  value: 10,  double() {   return this.value * 2;  } }; const { double } = obj; console.log(double()); // What do you think prints? 💭 Most developers say 20. The real answer? NaN. Here's why 👇 When you destructure double from obj, it loses its this binding. Called as a plain function, this no longer points to obj — it points to undefined (strict mode) or the global object (non-strict), where value doesn't exist. So this.value becomes undefined, and undefined * 2 = NaN. ✅ Let me know how will you fix it before the console. The rule to remember: A method is only bound to its object when called AS a method (obj.double()). The moment you detach it, this is gone. This trips up even experienced developers. How many of you got it right? 👇 #JavaScript #WebDev #Frontend #JSInterviewTips #CodingTips #InterviewExperience

🚨 𝗥𝗲𝗮𝗰𝘁 𝗖𝗼𝗱𝗲 𝗦𝗺𝗲𝗹𝗹 #𝟬𝟴: 𝗢𝘃𝗲𝗿𝘂𝘀𝗶𝗻𝗴 𝘂𝘀𝗲𝗠𝗲𝗺𝗼 Not everything needs optimization. Using useMemo for simple calculations often adds more complexity than value. 👉 Memoize expensive work, not trivial math 👉 Prefer simpler code 👉 Optimize only when necessary Clear code beats premature optimization. Have you ever removed a useMemo and simplified a component? 😄 #React #CleanCode #CodeSmell #ReactHooks #Frontend #JavaScript

Most developers use forEach() and map() interchangeably — but they are NOT the same. ✔ Use forEach() for side effects ✔ Use map() for transformation ✔ Prefer map() when you need a new array Understanding this difference shows strong JavaScript fundamentals. #JavaScript #Frontend #WebDevelopment #CodingInterview #TechInterview

JavaScript continues to evolve — from modern architectures to performance-focused frameworks. The new iJS JavaScript Magazine – Volume 23 brings together expert insights on today’s most important trends in JavaScript development, covering topics like modern frameworks, web architecture, and practical techniques for building high-performance applications. If you want to stay up to date with what’s shaping the JavaScript ecosystem, this issue is definitely worth exploring. 📖 Read the magazine: https://lnkd.in/d23RivQm Karsten Sitterberg  Manfred Steyer  Riccardo Degni  Navya Agarwal  Michael Dowden  Alfonso Graziano  Soumaya Erradi  Sebastian Springer   #JavaScript #WebDevelopment #Frontend #FullStack #SoftwareDevelopment

This small filter() mistake is hurting your JavaScript readability. Most developers write: Returning true or false inside an unnecessary if/else. But filter() already expects a boolean. Return the condition directly. Less noise. More clarity. Cleaner code. Readable code > clever code. Do you prefer explicit returns or implicit ones? 👇 #JavaScript #WebDevelopment #CleanCode #SoftwareEngineering #Frontend

I often see developers wrap components with React.memo expecting magic improvements. But memoization only works when props are stable. If you pass a new object, array, or function on every render, React sees a new reference and re-renders anyway. Example in the screenshot below The real fix is not “wrap everything with memo”. It’s: • Stable references • Controlled state boundaries • Smaller components • Clean architecture Performance problems usually start with structure, not React itself. Optimize intentionally. Not blindly. #ReactJS #FrontendDevelopment #JavaScript #WebPerformance #SoftwareEngineering #CleanCode #FullStackDeveloper