Understanding React Fundamentals: HTML DOM JavaScript

JavaScript Variables: Your Code's Memory Boxes! 🗃️✨ Think of variables as sticky notes 📝 where you jot down info your code needs— like numbers 🔢, text 📄, or lists 📋. JS offers 3 main types, each with super simple rules: var (The Vintage Choice) 🕰️ • Works across whole functions ⚙️ • Jumps to the top (hoisted!) 🚀 • Easy to change or reuse 🔄 • Skip it for new projects ❌ let (The Flexible Friend) 🧡 • Stays inside blocks {} 🧱 • Needs to be declared first ⏳ • Change the value anytime ➕➖ • Great for counters or loops 🔁 const (The Rock-Solid One) 🪨 • Locked to blocks {} 🔒 • Declare first, no changes allowed 🚫 • Can't redeclare it ❌ • Ideal for constants like API keys 🔑 Pro Tip: 💡 Start with const everywhere. Switch to let only if you need to update. Ditch var for cleaner code! 🧹 Which one trips you up most? Drop a comment! 👇💬 #JavaScript #WebDevelopment #FrontendDev #LearnToCode #CodingTips #JSBasics #Programming #Developers #TechTips #CodeNewbie #JavaScriptTips #Frontend #CodingLife #WebDev #100DaysOfCode

Day 11/60: Leveling up the JavaScript Game. 📈 Today wasn't about new syntax—it was about controlling the flow of time in my code. ⏳ Tackled Asynchronous JavaScript head-on: ✅ Promises: Taming the pending state. ✅ Async/Await: Making my code read like a story, not a maze. ✅ Fetch: Reaching out into the internet and bringing data home. We're done with the sandbox examples. Time to plan some real-world apps where this async magic actually matters. Async/Await > Callback Hell. It's not even close. What's the first app you ever built that used an API? Let me know in the comments! 👇 #JavaScript #Coding #Developer #AsyncJS #Programming #60DayChallenge

🚀 JavaScript Tip: Say Goodbye to “Try-Catch Hell” in 2026! If your code still feels like a pyramid of nested try-catch blocks just to handle a simple API call, you’re doing things the old-school way. The Safe Assignment Operator (?=) is changing how JavaScript handles errors by treating them as data instead of exceptions that interrupt your flow. Instead of wrapping everything in try-catch, you can now assign results in a cleaner, more linear way — while still capturing errors in a predictable format. Why developers are switching: ✅ No more deep nesting ✅ No more declaring variables outside blocks just to use them later ✅ Code stays top-to-bottom and easier to follow ✅ Feels similar to Go and Rust’s “error as value” approach So what about you — are you still using traditional try-catch for most cases, or have you started moving to safe assignments? 👇 #JavaScript #WebDev #Coding #SoftwareEngineering #CleanCode #Programming #ReactJS #TechTrends

JavaScript isn’t truly “multithreaded”… it just fakes it brilliantly. The Event Loop is the brain behind that illusion. Here’s the real game happening under the hood: • Call Stack → Executes synchronous code first • Microtask Queue → Promises, queueMicrotask, process.nextTick() • Macrotask Queue → setTimeout, setInterval, I/O, UI events The rule most devs miss: Microtasks always run before Macrotasks. Which leads to something interesting called Starvation. If microtasks keep getting added endlessly (like chained Promises), the event loop keeps prioritizing them… and macrotasks like setTimeout might wait longer than expected. So the order looks like this: Sync Code → Microtasks → Macrotask → repeat. Understanding this isn’t just theory. It explains why your async code sometimes behaves like it’s possessed. JavaScript looks simple on the surface. Underneath, it’s a tiny scheduler juggling tasks like a caffeinated circus performer. #javascript #webdevelopment #frontend #reactjs #nodejs #coding #programming #eventloop #asyncjavascript #developers

JavaScript does NOT use classical inheritance. It uses Prototype inheritance. Example: function Person(name) { this.name = name; } Person.prototype.sayHi = function() { console.log("Hi " + this.name); }; const p1 = new Person("Prakhar"); p1.sayHi(); How it works: JavaScript creates empty object Links it to Person.prototype Assigns this Returns object If property not found on object, JavaScript looks up the prototype chain. This is how inheritance works internally. Understanding prototypes makes debugging easier. #javascript #webdevelopment #frontend #programming

🚀 30 Days — 30 Coding Mistakes Beginners Make Day 13/30 I copied an object… and the original data changed 😐 const newUser = user Then I updated newUser… and user also changed. Because objects in JavaScript are stored by reference, not value. Both variables pointed to the same memory. Fix 👇 const newUser = { ...user } Now a new object is created. This concept is very important in React state updates and debugging strange UI behavior. Day 14 tomorrow 👀 #30DaysOfCode #javascript #reactjs #frontend #webdevelopment #codeinuse

If Javascript is single-threaded, how can 'await' wait? 🤔 If it actually waited, the whole app would freeze !! Actually, await pauses the function, not the thread. 1. In an async function, when 'await getSomePromise()' is encountered, the rest of the function is scheduled as a microtask (pausing for "awaited" promise) 2. The thread returns to the caller of async function. 3. Once the Promise resolves it enters the microtask queue, to get executed by javascript engine once the call stack becomes empty. 🧠 Mental model: Think of a function as a chapter in a book 📕, Within a chapter, 'await' simply places a bookmark, moves on to other chapters, and comes back later. 📝 I wrote a short blog explaining this step-by-step with code and execution flow here👇🏻 https://lnkd.in/g5q2CjWU #javascript #asyncawait #webdevelopment #promises #frontend #softwareengineering #eventloop #javascriptinternals #programming #coding #microtasks

Two Important JavaScript Concepts Every Developer Should Know 🚀 I made a simple guide to explain Debounce and Throttle. ⚡ Debounce – Function runs after the last call. 👉 Example: Wait until user stops typing in a search box. 👉 Analogy: Elevator door – waits for people, then closes. ⏱️ Throttle – Function runs once in a fixed interval. 👉 Example: Run scroll function every 1 second, not every scroll. 👉 Analogy: Metro train – leaves every 10 minutes, no matter what. Why this matters? Your website becomes faster and smoother. No more lag! 💨 Which one do you use more? Share in comments! 👇 #JavaScript #WebDevelopment #Coding #Frontend #ProgrammingTips

Day 7 of “Js in bits series – (Datatypes - undefined)” Key ideas covered in the article: 🔹 What undefined actually represents 🔹 When JavaScript automatically assigns undefined 🔹 Common scenarios where developers encounter it 🔹 The difference between undefined and null 👉 https://lnkd.in/gSN7MqSY #javascript #webdevelopment #frontend #softwareengineering #coding #learning

Redux: Vanilla JavaScript https://lnkd.in/gspp_2MK A practical guide to implement Redux in Vanilla JavaScript, stripping away the complexity of frameworks to focus on core state management principles. Walking through the essential Redux workflow—Actions, Reducers, and the Store—demonstrating how to maintain a single source of truth in a web application. #ReactJS #reactjscourse #reactjsdeveloper #reactjsdevelopment #reactjstraining #codechallenge #programming #CODE #Coding #code #programmingtips #Redux #reduxredux