JavaScript Debouncing vs Throttling Explained

Reposting this 🔁 — Debouncing vs Throttling explained really well 🚀 These two concepts look simple, but they play a huge role in frontend performance. 🔹 Debouncing → waits until the user stops the action (perfect for search inputs) 🔹 Throttling → executes at fixed intervals (great for scroll & resize events) Understanding when and why to use each one can: Reduce unnecessary API calls Improve app performance Create smoother user experiences If you’re working with JavaScript / React, this is a must-know concept. Highly recommend going through this post 👍 Credits: Naganathan A 🙌 #JavaScript #WebDevelopment #Frontend #ReactJS #PerformanceOptimization #Learning #Developers

🔁 Closures in JavaScript A closure is when a function remembers variables from its parent function, even after the parent function has finished executing. function outer() {  let count = 0;  return function inner() {   count++;   console.log(count);  } } const counter = outer(); counter(); // 1 counter(); // 2 👉 inner() still remembers count 👉 That memory is called a closure If closures ever confused you, save this post 👍 #JavaScript #WebDevelopment #Frontend #CodingSimplified #LearnJS #BhaviDigital

Can you guess the output? 🤔 (JavaScript — no cheating) Take a second and think… 👇 👇 Output: A D C B Why does this happen? Because of the Event Loop. JavaScript first runs all synchronous code. Once the call stack is empty, the Event Loop: - executes all microtasks (Promises) - then moves to the macrotask queue (timers) That’s why Promise callbacks run before setTimeout, even with 0ms. Once the Event Loop clicks, async JavaScript finally starts making sense. Did you guess it right? 😄 #javascript #js #eventloop #async #frontend

Most developers don’t know this about JavaScript closures 🤯 Closures are not magic. They simply remember the variables even after the function is executed. That’s why: • setTimeout • Event listeners • Callbacks work so smoothly. If closures confuse you → practice small examples, not big codebases. Question: What topic confused you the most in JavaScript? 👇 #JavaScript #WebDevelopment #Frontend #CodingLife

Closures in JavaScript — Explained Simply A lot of people use closures without actually understanding them. So let’s kill the confusion. What’s a Closure? A closure is just a function that remembers the variables from where it was created, even after that outer function has finished running. Think of it like this The inner function carries a backpack Inside that backpack → variables from the outer scope. #JavaScript #Closures #WebDevelopment #Frontend #ReactJS #LearningInPublic #JavaScriptBasics

Ever wondered why useEffect runs twice and thought: “React is broken”? It’s actually doing you a favor. In development, React deliberately re-runs effects to expose: - Hidden side-effects - Missing cleanups - Unsafe logic This behavior occurs in Strict Mode and does not affect production. Once you understand this, you can stop fighting React and start writing effects that are predictable, clean, and future-proof. React isn’t trolling you; it’s training you. #React #ReactHooks #Frontend #JavaScript #WebDevelopment

Ever wondered why your JavaScript logs run out of order? This is one of the most common async mistakes. The fix isn’t complex — it’s async/await. Once you see it, you can’t unsee it. Cleaner flow. Predictable output. Better code. Try this pattern in your code today. #JavaScript #AsyncAwait #WebDevelopment #Frontend #SoftwareEngineering #makstyle119

😄 JavaScript be like… “I deleted it, but it’s still there?” Used delete on an array element and expected magic ✨ Instead, JavaScript said: “Here, take an empty slot.” 🕳️ 👉 delete removes the value, not the index 👉 The array length stays the same 👉 Surprise bugs unlocked 😅 💡 Pro tip: If you actually want to remove an element and reindex the array — use splice() 🧹 Small quirks like this are what make JavaScript fun (and sometimes scary 😄). #JavaScript #CodingHumor #WebDevelopment #Frontend #DevLife #LearnJS

🚀 JavaScript Promises — From Pending to Powerful Promises solve a simple problem: 👉 “I’ll give you the result later.” They make async code readable, predictable, and chainable. 🧠 Promise States (In Real Life) Pending → task started Fulfilled → task completed successfully Rejected → task failed A promise moves only once from pending. 📌 What’s Happening Here? ✔️ Promise starts in pending state ✔️ resolve moves it to fulfilled ✔️ .then() passes data to the next step ✔️ .catch() handles errors in the chain 💡 Golden Rule: “Every .then() returns a new promise — that’s why chaining works.” #JavaScript #Promises #AsyncJavaScript #Frontend #WebDevelopment #JSConcepts #InterviewPrep #ReactJS

🚀 JavaScript Hoisting: What Really Happens Behind the Scenes? Hoisting is one of those JavaScript concepts that looks confusing… until you understand how the JavaScript engine reads your code. 🧠 Hoisting = memory allocation before execution, not moving code upward. 📌 What’s Really Happening? ✔️ var is hoisted and initialized with undefined ✔️ let and const are hoisted but stay in the Temporal Dead Zone (TDZ) ✔️ Accessing let / const before initialization throws ReferenceError ✔️ Function scope creates a new execution context with its own hoisting phase 💡 Rule to Remember: “If JavaScript knows the variable exists but hasn’t initialized it yet → TDZ.” #JavaScript #Hoisting #Frontend #WebDevelopment #JSInternals #InterviewPrep #ReactJS #MERN