JavaScript Performance: Debouncing vs Throttling Explained

𝗪𝗲𝗹𝗰𝗼𝗺𝗲 𝘁𝗼 𝗗𝗮𝘆 𝟭𝟲 JavaScript is single-threaded. So how can it handle: • Synchronous code • Promises • Timers All at the same time? The answer is task priority and the Event Loop. In this video, I demonstrate exactly how tasks are added and executed based on priority. 𝙒𝙝𝙚𝙣 𝙘𝙤𝙙𝙚 𝙧𝙪𝙣𝙨: -> Code executes first (Call Stack). -> Promise callbacks go to the Microtask Queue. -> setTimeout callbacks go to the Macrotask Queue. 𝙃𝙤𝙬 𝙩𝙝𝙚 𝙀𝙫𝙚𝙣𝙩 𝙇𝙤𝙤𝙥 𝙋𝙞𝙘𝙠𝙨 𝙏𝙖𝙨𝙠𝙨 When the Call Stack becomes empty: -> Run ALL microtasks (Promises first). -> Then run ONE macrotask (setTimeout). -> Repeat the cycle. Microtasks always have higher priority. 𝙏𝙝𝙞𝙨 𝙥𝙧𝙞𝙤𝙧𝙞𝙩𝙮 𝙨𝙮𝙨𝙩𝙚𝙢 𝙞𝙨 𝙬𝙝𝙖𝙩 𝙖𝙡𝙡𝙤𝙬𝙨 𝙅𝙖𝙫𝙖𝙎𝙘𝙧𝙞𝙥𝙩 𝙩𝙤: • Stay responsive • Execute async logic predictably • Simulate concurrency while staying single-threaded #JavaScript #WebDevelopment #FrontendDevelopment #EventLoop #AsyncJavaScript #SoftwareEngineering #DeveloppementWeb #JavaScriptFR

Practiced using map() in JavaScript today. Instead of manually looping through an array, map() creates a new transformed array. Cleaner logic. Better readability. Small improvements like this make code more maintainable. #JavaScript #ArrayMethods #WebDevelopment #FrontendDevelopment #CleanCode #LearningInPublic #CodingJourney #DeveloperLife #100DaysOfCode

🚀 JavaScript Variables, Finally Decoded: var vs let vs const If you’ve ever wondered when to use var, let, or const, this breakdown makes it crystal clear. 💡 Key takeaways every JS developer should know: var is function-scoped and hoisted as undefined → easy to introduce bugs let and const are block-scoped → safer and more predictable const prevents reassignment (not immutability) let is perfect for loop counters and values that change Redeclaration errors = protection, not punishment 😄 ✅ Modern best practice Default to const Use let only when reassignment is required 🚫 Avoid var in modern JavaScript Cleaner scope. Fewer bugs. Happier future you. #JavaScript #WebDevelopment #Frontend #ProgrammingTips #ES6 #CleanCode #DevLife

Intercept, Control, Reflect: Power Tools Hidden in JavaScript 🪞 Learned about the Proxy pattern in JavaScript and how it works closely with the Reflect object. Explored how Proxies allow interception of operations like: -Property access -Assignment -Validation -Logging or access control And how Reflect provides a clean, predictable way to forward those operations while preserving default behavior. Key takeaway: Proxies are powerful but sharp tools. They enable elegant abstractions, yet can hurt readability and debugging if overused. Reflect helps keep proxy logic explicit and intention-revealing. Understanding these internals deepens how JS really works under the hood. #JavaScript #DesignPatterns #ProxyPattern #FrontendDevelopment #WebDevelopment #LearnInPublic

🚀 If...Else Statement in JavaScript The if...else statement helps your program make decisions. It runs one block of code when the condition is true, and a different block when the condition is false. This is how programs handle real-world situations. 🔹 Why it’s important? Because every real application needs logic. Your program must respond differently based on different conditions. 🔹 Simple Understanding: if → Executes only when the condition is true if...else → Handles both true and false cases Strong fundamentals build strong developers. #JavaScript #WebDevelopment #CodingJourney #FrontendDeveloper #LearnInPublic #100DaysOfCode

#Day 26 / 100 – JavaScript Practice & Error Handling 📌 Today I focused on understanding modern JavaScript behavior and applied it by building a Login Form with validation. ✅worked on today: • Deep understanding of this keyword • Error handling using try & catch • Writing cleaner code with arrow functions • Learned implicit return in arrow functions • Used setTimeout and setInterval for timed execution • Explored how this behaves inside arrow functions • Practiced questions to strengthen concepts 🔧 Practice: Built a Login Form UI and handled input validation & errors using JavaScript logic. Day 26 complete ✅ 👍🏻 🚀 #Day26 #JavaScript #ErrorHandling #ArrowFunctions #FrontendDevelopment #LearningByDoing #100DaysOfCode

Every program starts with a decision. The if statement in JavaScript is where logic begins 🧠 One condition. One decision. That’s how smart code is written. #JavaScript #IfStatement #ProgrammingLogic #FrontendDeveloper #WebDevelopment #CodingTips

🔥 JavaScript Concept: Hoisting — Code Moves Before Execution Hoisting is JavaScript’s behavior of moving declarations to the top of their scope before execution. 🔹 Key Points ✔ "var" is hoisted and initialized as "undefined" ✔ "let" & "const" are hoisted but NOT initialized (Temporal Dead Zone) ✔ Function declarations are fully hoisted 🔹 Example console.log(a); // undefined var a = 10; console.log(b); // Error let b = 20; 💡 Understanding hoisting helps prevent unexpected bugs. Write predictable code → Prefer "let" and "const" ✔ #JavaScript #Hoisting #CleanCode #Developers

https://lnkd.in/diyD-KU3 slice vs splice in JavaScript — a small concept that makes a big difference. Understanding which array methods mutate data and which don’t is crucial for writing predictable and bug-free code, especially in frontend frameworks. Sharing a quick visual breakdown for anyone revising JavaScript fundamentals. Which array method confused you the most when you started? #JavaScriptDevelopers #FrontendDevelopment #ProgrammingBasics #DevelopersOfLinkedIn #ContinuousLearning

We often focus on component optimizations, but the biggest performance win often hides in plain sight: your initial JavaScript bundle size. I’ve seen production applications become orders of magnitude faster just by being ruthless with code splitting. It’s not about shipping less code *overall*, but about not delivering code until it's ABSOLUTELY necessary. Think route-level lazy loading, or even conditionally importing heavy third-party libraries. Audit your critical render path. If a component or dependency isn't needed for the first paint, defer it. Learn more about effective code splitting: https://lnkd.in/gh2A4yGw #FrontendPerformance #WebDevelopment #CodeSplitting #JavaScript