JavaScript Basics: How it Works

Ever wondered what actually happens when you use new in JavaScript? 🤔 Today I learned: 👉 How objects are created behind the scenes 👉 How prototypes are linked 👉 How constructors build instances Documented everything in this article 👇 https://lnkd.in/gr2UykHg #JavaScript #100DaysOfCode #WebDev #chaicode Chai Code Hitesh ChoudharyPiyush Garg Akash Kadlag Suraj Kumar Jha

I used to write JavaScript like this: getData(function(a) { processData(a, function(b) { saveData(b, function(c) { console.log("done... maybe?"); }); }); }); My senior dev looked at my screen, took a deep breath, and said: "We need to talk." 😭 That was my introduction to Callback Hell — and the moment I realized I had a LOT to learn about Asynchronous JavaScript. Here's the evolution every JavaScript developer goes through: Stage 1 — Callbacks 😵 You pass functions into functions. It works. But nest 4 of them and your code looks like a pyramid of doom. Nobody wants to debug that at 2am. Stage 2 — Promises 🤝 Cleaner. Chainable. You discover .then(), .catch(), .finally() and feel like a genius. Until you chain 7 of them and wonder if this is really better. Stage 3 — Async/Await ✨ The moment everything clicks. Your async code finally reads like a story. Clean, readable, debuggable. This is where real JavaScript development begins. Stage 4 — You stop panicking about the Event Loop 🧘 You understand why JavaScript doesn't block. You understand the Call Stack, the Web APIs, the Callback Queue. And suddenly the whole language makes sense. Most developers skip understanding the why and jump straight to copying async/await from Stack Overflow. Don't be that developer. Understand the journey: Callbacks → Promises → Async/Await → Fetch API → Axios Each one exists because the previous one had a problem. Each one made us better. Save this carousel. It covers everything you need — Callbacks, Promises, Promise Chaining, Async/Await, setTimeout, Event Listeners, Fetch API, Axios, and XHR — all with real code examples. Whether you're just starting out or brushing up before an interview, this one's for you. 🚀 Drop a 🔥 in the comments if async JS once broke your brain — and tell me which stage you're currently at! #JavaScript #WebDevelopment #AsyncJavaScript #Programming #100DaysOfCode #CodeNewbie #SoftwareEngineering #Frontend #LearnToCode #JavaScriptTips #TechEducation #Coding #DevCommunity #FrontendDevelopment #CareerInTech

🧠 Day 13 — Class vs Prototype in JavaScript (Simplified) JavaScript has both Classes and Prototypes — but are they different? 🤔 --- 🔍 The Truth 👉 JavaScript is prototype-based 👉 class is just syntactic sugar over prototypes --- 📌 Using Class (Modern JS) class Person { constructor(name) { this.name = name; } greet() { console.log(`Hello ${this.name}`); } } const user = new Person("John"); user.greet(); // Hello John --- 📌 Using Prototype (Core JS) function Person(name) { this.name = name; } Person.prototype.greet = function () { console.log(`Hello ${this.name}`); }; const user = new Person("John"); user.greet(); // Hello John --- 🧠 What’s happening? 👉 Both approaches: Create objects Share methods via prototype Work almost the same under the hood --- ⚖️ Key Difference ✔ Class → Cleaner, easier syntax ✔ Prototype → Core JavaScript mechanism --- 🚀 Why it matters ✔ Helps you understand how JS works internally ✔ Useful in interviews ✔ Makes debugging easier --- 💡 One-line takeaway: 👉 “Classes are just a cleaner way to work with prototypes.” --- #JavaScript #Prototypes #Classes #WebDevelopment #Frontend #100DaysOfCode

💡 JavaScript Isn’t That Difficult — You’re Just Looking at It the Wrong Way A lot of beginners think JavaScript is complicated… but honestly, it’s not. What is difficult is trying to learn everything at once. Let’s simplify it 👇 --- 🚀 What Actually Matters in JavaScript Instead of getting overwhelmed, focus on these core concepts: 1️⃣ Variables & Data Types Understand how data is stored: - "let", "const", "var" - Strings, Numbers, Booleans, Arrays, Objects 👉 This is your foundation — don’t rush it. --- 2️⃣ Functions (The Real Power ⚡) Functions are everywhere in JavaScript. function greet(name) { return "Hello " + name; } 👉 Learn: - Parameters & return values - Arrow functions - Callback functions --- 3️⃣ DOM Manipulation 🌐 This is where JavaScript becomes alive. - Selecting elements - Changing text/styles - Handling events document.querySelector("button").onclick = () => { alert("Clicked!"); }; --- 4️⃣ Events & User Interaction Click, scroll, input — everything is an event. 👉 Understanding events = building real apps --- 5️⃣ Arrays & Objects Most real-world data is stored here. const user = { name: "Sufiyan", age: 18 }; 👉 Learn methods like: - "map()", "filter()", "forEach()" --- 6️⃣ Asynchronous JavaScript ⏳ This is where many beginners struggle — but it’s not scary. 👉 Learn step by step: - "setTimeout" - Promises - "async/await" --- 🧠 Truth You Should Know JavaScript isn’t hard… ❌ Watching tutorials endlessly is hard ❌ Not practicing is hard ❌ Jumping between topics is hard --- ✅ The Right Approach ✔ Learn one concept at a time ✔ Build small projects (calculator, to-do app, etc.) ✔ Make mistakes — that’s how you grow --- 🔥 Final Thought JavaScript is not difficult. It only feels difficult when you don’t have a clear path. Start small. Stay consistent. Build things. You’ll be surprised how fast you improve 🚀 --- 💬 Are you learning JavaScript right now? What topic feels hardest to you? #JavaScript #WebDevelopment #Coding #Programming #Frontend #LearnToCode #Developers

Starting React? Here are 6 beginner tips that will save you hours of confusion. When I first started learning React, I used to jump directly into projects without understanding the basics properly. Because of that, even small things like passing data, handling events, or using hooks felt difficult. If you're beginning your React journey, focus on these 6 things first: 1. Start with Create React App / Vite Before learning advanced concepts, create a basic project and understand the folder structure. npx create-react-app my-app or npm create vite@latest 2. Learn JSX Properly JSX is not HTML. It looks similar, but there are some important differences: * Use `className` instead of `class` * Use `{}` to write JavaScript inside JSX * Components must return a single parent element Example: const name = "Durgesh"; return <h1>Hello, {name}</h1>; 3. Understand Components React is all about reusable components. Instead of writing the same UI again and again, create components and reuse them. Example: function Button() { return <button>Click Me</button>; } Small reusable components make your code cleaner and easier to manage. 4. Learn State and Props These are the heart of React. * Props = pass data from parent to child * State = store and update data inside a component If you understand these two concepts well, React becomes much easier. 5. Practice Event Handling Every application needs interactions like clicks, typing, submitting forms, etc. Example: <button onClick={() => alert("Clicked!")}> Click Me </button> Practice events early because they are used in almost every project. 6. Start Learning Hooks After basics, learn hooks like: * useState * useEffect * useRef Start with `useState` first because it helps you understand how React updates the UI. My suggestion: Don't try to learn everything in one day. Spend 1–2 days on each topic and build a tiny project after learning it. The more you build, the faster you learn. As someone working with React and frontend development, I’ve realized that consistency matters more than speed. Even 1 hour every day can make a huge difference. Which React topic confused you the most when you started? 👇 #ReactJS #React #FrontendDevelopment #JavaScript #WebDevelopment #Coding #Programming #LearnToCode #ReactDeveloper #Frontend

I just shipped my 5th JavaScript project in public. Here's everything I built and everything I learned. 6 months ago I had done a JavaScript course but never built anything real. Today I have 5 live projects, 5 GitHub repos and a portfolio that actually shows what I can do. Here's what I built: 1. Expense Splitter Solves post-braai WhatsApp arguments about money. Built a debt settlement algorithm that calculates minimum transactions. 🔗 https://lnkd.in/dr5P2UCh 2. Job Application Tracker A Kanban board for tracking job applications with drag and drop. Built while actively job hunting the irony was not lost on me. 🔗 https://lnkd.in/epCemVgU 3. Currency Converter Real-time exchange rates fetched from a live API. My first time writing async/await and talking to the internet with code. 🔗 https://lnkd.in/dMgWQfmh 4. GitHub Profile Analyser Enter any GitHub username and get a recruiter score out of 100. Uses Promise.all() to fetch per-repo language data simultaneously. 🔗 https://lnkd.in/dFQtprNV 5. Smart Study Scheduler Generates a personalised study plan using a spaced repetition algorithm. Calculates sessions based on exam dates, priority and daily availability. 🔗 https://lnkd.in/d6VC9P4z Here's everything I learned across all 5 projects: → DOM manipulation and event listeners → Arrays, objects and array methods → fetch() with async/await and error handling → Promise.all() for parallel API calls → Drag and Drop API → localStorage and JSON storage → Algorithm design, debt settlement and spaced repetition → Date manipulation in JavaScript → CSS variables and dark/light theming → CSS Grid for dashboard layouts → Git and GitHub version control → Deploying live sites with GitHub Pages I built everything in vanilla JavaScript. No React. No frameworks. Just the fundamentals properly understood. If you're learning to code build things. Real things. Things that solve real problems. Post about them. The learning compounds fast. Most junior developers can build a frontend. Far fewer can build the whole thing a real backend, a real database, authentication, security and deployment. This is my next focus... lets do this #javascript #buildinpublic #webdevelopment #frontenddevelopment #hiring #juniordev

🚀 Still confused between JS and JSX in React? Let’s break it down. When I started learning React, I kept asking: 👉 Is JSX just JavaScript? 👉 Why does HTML appear inside JS? 👉 Which one should I use? 😬 It was confusing at first… but once I understood, everything clicked. 💡 What is JavaScript (JS)? JavaScript is the core programming language of the web. 👉 Used for logic, functions, APIs 👉 Works in all browsers 👉 No HTML inside code Example: 👉 const name = "John"; 👉 function greet() { return "Hello " + name; } 💡 What is JSX? JSX = JavaScript + HTML-like syntax (used in React) 👉 Lets you write UI inside JavaScript 👉 Makes code more readable 👉 Compiles to regular JavaScript Example: 👉 const element = <h1>Hello {name}</h1>; 💡 Key Differences: ✔ JS → Logic & functionality ✔ JSX → UI structure (what you see on screen) ✔ JS → Pure JavaScript syntax ✔ JSX → HTML-like + JavaScript combined 💡 Which one is better? 👉 They are not competitors — they work together ✔ Use JS for logic ✔ Use JSX for UI 💡 Why JSX is powerful in React: ✔ Cleaner and more readable UI code ✔ Easier to visualize components ✔ Reduces complexity compared to manual DOM manipulation 🔥 Pro tip: Don’t try to replace JavaScript with JSX — master both together. 🔥 Lesson: Great React developers don’t choose between JS and JSX — they combine them effectively. Are you comfortable with JSX or still finding it confusing? #React #JavaScript #JSX #WebDevelopment #Frontend #CodingTips #Programming

From the "steep learning curve" of Angular to the "isomorphic code" of Meteor, every framework has a trade-off. We’ve summarized the pros and cons of the industry's top JavaScript tools to help you decide what fits your workflow: ✅ Angular for TypeScript lovers. ✅ React for component-based reusability. ✅ Vue for rapid, lightweight development. ✅ Ember for battle-tested stability. Which is your go-to framework for 2026? Let us know in the comments! Full Article: https://lnkd.in/ezJc4_Ac #JavascriptFrameworks #Programming #FrontEndDev #CodingCommunity #WebDevTips #Java #Javascript #technology Seth Narayanan Kathleen Narayanan Tracy Vinson Bill Brady Balakrishna D

𝗬𝗼𝘂𝗿 𝗰𝗼𝗱𝗲 𝗶𝘀𝗻’𝘁 𝘀𝗺𝗮𝗿𝘁… 𝘂𝗻𝘁𝗶𝗹 𝗶𝘁 𝗰𝗮𝗻 𝗺𝗮𝗸𝗲 𝗱𝗲𝗰𝗶𝘀𝗶𝗼𝗻𝘀. Writing JavaScript isn’t just about functions and variables. It’s about teaching your code 𝘄𝗵𝗲𝗻 𝘁𝗼 𝗱𝗼 𝘄𝗵𝗮𝘁. That’s where Conditional Statements come in 👇 🔹 𝟭. 𝗶𝗳 𝗦𝘁𝗮𝘁𝗲𝗺𝗲𝗻𝘁 👉 Runs code when a condition is true Example: if (age >= 18) { console.log("Eligible to vote"); } ✅ Use case: Basic decision-making 🔹 𝟮. 𝗶𝗳...𝗲𝗹𝘀𝗲 👉 Handles two possible outcomes Example: if (age >= 18) { console.log("Adult"); } else { console.log("Minor"); } ✅ Use case: Binary conditions 🔹 𝟯. 𝗲𝗹𝘀𝗲 𝗶𝗳 𝗟𝗮𝗱𝗱𝗲𝗿 👉 Multiple conditions Example: if (marks >= 90) { console.log("A"); } else if (marks >= 75) { console.log("B"); } else { console.log("C"); } ✅ Use case: Grading systems, multi-level checks 🔹 𝟰. 𝘀𝘄𝗶𝘁𝗰𝗵 𝗦𝘁𝗮𝘁𝗲𝗺𝗲𝗻𝘁 👉 Cleaner alternative for multiple exact matches Example: switch (role) { case "admin": console.log("Full access"); break; case "user": console.log("Limited access"); break; default: console.log("Guest"); } ✅ Use case: Role-based logic, menus 🔹 𝟱. 𝗧𝗲𝗿𝗻𝗮𝗿𝘆 𝗢𝗽𝗲𝗿𝗮𝘁𝗼𝗿 (? :) 👉 Short form of if-else Example: const result = age >= 18 ? "Adult" : "Minor"; ✅ Use case: Clean inline conditions (especially in React) 🔹 𝟲. 𝗟𝗼𝗴𝗶𝗰𝗮𝗹 𝗢𝗽𝗲𝗿𝗮𝘁𝗼𝗿𝘀 𝗶𝗻 𝗖𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀 Example: if (isLoggedIn && isVerified) { console.log("Access granted"); } ✅ Use case: Combining multiple conditions 🔹 𝟳. 𝗡𝘂𝗹𝗹𝗶𝘀𝗵 𝗖𝗼𝗮𝗹𝗲𝘀𝗰𝗶𝗻𝗴 (??) Example: let name = userName ?? "Guest"; ✅ Use case: Default values only when null or undefined 𝗙𝗶𝗻𝗮𝗹 𝗧𝗮𝗸𝗲𝗮𝘄𝗮𝘆 Great developers don’t just write code… They write code that thinks and decides. Which conditional do you use the most in your daily coding? 👇 💡 Part of my #FrontendRevisionMarathon — breaking down frontend concepts daily 🚀 🚀 Follow Shubham Kumar Raj for more such content. #JavaScript #WebDevelopment #Frontend #CodingTips #100DaysOfCode #codinginterview #learnjavascript #programming #interviewprep #CareerGrowth #SowftwareEngineering #OpenToWork #ReactJS #FrontendDevelopment #Coding #Hiring

I published a book today. JavaScript: The Parts It is a foundational guide to JavaScript for developers who learned the language by imitation — who can build things, ship things, and make things work, but struggle to explain what their code is actually doing. That was me for longer than I'd like to admit. I learned JavaScript the way most people do: tutorials, patterns, copy-paste until it runs. I could produce output. I couldn't always explain it. When someone asked me in an interview to describe what my code was doing, the words weren't there — because the understanding that would produce those words wasn't there either. This book is what I wish had existed when I was starting out. It uses a method called PARTS — Problem, Answer, Reasoning, Terms, Syntax — to introduce every concept in the order that actually builds understanding, rather than the order that just gets code to run. It's technically precise without being dense. And it's honest about what it's like to feel like you're faking it, and why that feeling has a specific cause and a specific fix. It's available now on Leanpub, and it's the first book in a planned series covering the full self-taught developer curriculum. 👉 leanpub.com/jsparts If you know a developer who's been coding for years but still feels like they're faking it — this is for them.