kirti patel’s Post

🚀 TypeScript Best Practices: The Comma (,) vs. The Semicolon (;) Whether you're a seasoned engineer or just starting your TypeScript journey, small syntax choices can make a huge difference in code readability and maintainability. One of the most common questions for developers transitioning from JavaScript is: "When do I use a comma versus a semicolon?" Here is a quick breakdown to keep your enterprise-grade codebase clean and consistent. 🏗️ The Semicolon (;): Defining the Blueprint When you are defining Interfaces or Type Aliases, you are creating a "set of instructions" or a contract for the compiler, not actual data. Best Practice: Use semicolons to terminate members in a structural definition. Why? Interfaces are conceptually similar to class definitions. The semicolon tells the TypeScript compiler that the definition of that specific property or method is complete, acting as a clear boundary for the engine. TypeScript // ✅ Good: Clear separation of structural definitions interface User { id: number; name: string; email: string; } 💎 The Comma (,): Handling the Data When you move from defining a type to creating an Object Literal, you are working with live data in the JavaScript runtime. Best Practice: Use commas to separate key-value pairs in an object. Why? In JavaScript, an object is essentially a list of data. Commas are the standard delimiter for items in a list, just like in an array. Using a semicolon inside an object literal is a syntax error that will break your build! TypeScript // ✅ Good: Standard JavaScript object notation const activeUser: User = { id: 1, name: "John Doe", email: "dev@example.com", // Trailing commas are great for cleaner Git diffs! }; 💡 Senior Dev Tips for Your Workflow Visual Distinction: While TS technically allows commas in interfaces, sticking to semicolons helps you distinguish "Types" from "Objects" at a glance during rapid code reviews. Watch the Typos: Ensure your implementation strictly follows your interface—watch out for common spelling slips like balance vs balence which can lead to runtime headaches. Accessibility First: Remember that clean code is accessible code—maintaining strict typing and clear syntax supports better documentation for everyone on the team. What's your preference? Do you stick to semicolons for types to keep things "classy," or do you prefer the comma-everywhere approach? Let's discuss in the comments! 👇 #TypeScript #WebDevelopment #CodingBestPractices #FrontendEngineering #CleanCode #JavaScript #SeniorDeveloper

Day 3/30 — JavaScript Journey JavaScript Conditionals (if / else, switch) Today your code learns to DECIDE. 🧠 Most beginners write code that runs. Great developers write code that thinks. 🔥 The Core Idea Conditionals turn JavaScript from a calculator into a decision engine. Your code stops doing everything… and starts doing the right thing at the right time. ⚡ if / else → Real-Time Decisions Use this when logic is dynamic and complex. if (user.isLoggedIn) {  showDashboard(); } else {  redirectToLogin(); } 👉 Reads like human thinking: “If this is true → do this, otherwise → do that.” ⚡ else if → Multiple Paths if (score > 90) {  grade = "A"; } else if (score > 75) {  grade = "B"; } else {  grade = "C"; } 👉 Your code evaluates top → bottom First match wins. Execution stops. ⚡ switch → Clean Structured Decisions Best when comparing one value against many options switch (role) {  case "admin":   access = "full";   break;  case "user":   access = "limited";   break;  default:   access = "guest"; } 👉 Cleaner than multiple else if 👉 Faster to scan, easier to maintain ⚠️ Critical Concepts (Most People Miss This) • Truthiness matters if ("0") // true 😳 if (0)  // false • === vs == 5 == "5"  // true (loose) 5 === "5" // false (strict) 👉 Always prefer === (predictable behavior) • Missing break in switch = fall-through bug case "admin":  access = "full"; // no break → next case runs too ⚠️ 🧠 Pro Insight Conditionals are not just syntax… They define your application’s behavior logic. Bad logic = bugs Good logic = clean systems 💡 When to Use What Situation Best Choice Complex logic / ranges if / else Multiple conditions else if Single variable, many values switch 🚀 Final Thought Beginners write: “Make it work” Developers evolve to: “Make it decide correctly” Because in real systems… logic is everything. If you master conditionals, you don’t just write code anymore — you control outcomes. 🔥

The last version of TypeScript built on JavaScript. Most people noticed the breaking changes: strict true by default, ES5 support dropped, @types no longer auto-loaded, outFile gone for good. What's easy to miss is the historical significance: this is the last version of TypeScript built on JavaScript. The compiler that's been running on Node.js since 2012 (14 years) ships its final release. Everything after this is TypeScript 7.0, rewritten in Go. The numbers are real: ✨ VS Code's 1.5 million line codebase: 78 seconds → 7.5 seconds; ✨ Sentry's codebase: 133 seconds → 16 seconds; ✨ Multi-threaded, native binary: ~57% less memory. So why not just celebrate? A few things worth keeping in mind: plugin ecosystem is broken by design. Any custom transformer, ts-patch plugin, or tool relying on the TypeScript compiler API in JS won't work with tsgo out of the box. If your build pipeline has custom tooling → check compatibility now, not when 7.0 lands. WebAssembly performance is a concern. Evan you raised it publicly: Go's Wasm output is slower than the existing JS implementation for browser-based tools. CodeSandbox, StackBlitz, web playgrounds — they run tsc in the browser. Go-compiled Wasm doesn't win there. You're migrating twice, in quick succession. 6.0 breaks enough defaults to require real work. 7.0 follows within months. For teams that don't move fast, this is two migrations with no breathing room between them. The 10x is a build-time story, not a runtime one. Your users won't feel it. Your CI pipeline will. Keep that in context when making the case for migration internally. The Go choice over Rust is worth noting too. Not because it's wrong, but because it goes against the current JS tooling trend (SWC, Deno, Turbopack are all Rust). Microsoft said that Go's GC fits TypeScript's data structures better, and porting was faster than a full redesign. Pragmatic over ideologically pure. The era of a JS-based TypeScript compiler is officially over. 14 years, 1 language, 1 runtime... and now a clean break. Curious where you stand: are you already on 6.0, or still holding off?

I've been writing JavaScript for years, but if you'd asked me to explain closures clearly six months ago — I'd have struggled. Not because I didn't use them. I used them constantly. debounce functions, event handlers, useState under the hood — all closure-powered. I just couldn't articulate the mental model behind them. So I wrote it down. My latest article breaks down closures and currying using a framework I call the "three questions" — a way to approach any closure problem before writing a single line of code: 1. What needs to be remembered between calls? 2. What does the returned function do with that memory? 3. What does the outer function receive as setup? Once you have those three answers, the code almost writes itself. The article also covers: - Why stale closures are React's most common bug - Two flavours of closure (mutable vs immutable recursive) - How currying shows up in your daily React code without you realizing - Real implementations of debounce, memoize, and partial application If closures have always felt a bit slippery, this one's for you. https://lnkd.in/g2ZKvVUd

✨ 𝗪𝗿𝗶𝘁𝗲 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗦𝘁𝗿𝗶𝗻𝗴𝘀 𝗟𝗶𝗸𝗲 𝗔 𝗛𝘂𝗺𝗮𝗻 ⤵️  Template Literals in JavaScript: Write Strings Like a Human ⚡  🔗 𝗥𝗲𝗮𝗱 𝗵𝗲𝗿𝗲: https://lnkd.in/d_HhAEsM  𝗧𝗼𝗽𝗶𝗰𝘀 𝗰𝗼𝘃𝗲𝗿𝗲𝗱 ✍🏻:   ⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺   ⇢ Why string concatenation becomes messy in real apps   ⇢ Template literals — the modern way to write strings   ⇢ Embedding variables & expressions using ${}   ⇢ Multi-line strings without \n headaches   ⇢ Before vs After — readability transformation   ⇢ Real-world use cases: HTML, logs, queries, error messages   ⇢ Tagged templates (advanced but powerful concept)   ⇢ How interpolation works under the hood   ⇢ Tradeoffs & common mistakes developers make   ⇢ Writing cleaner, more readable JavaScript  Thanks Hitesh Choudhary Sir & Piyush Garg Sir, and the amazing Chai Aur Code community 🙌  #ChaiAurCode #JavaScript #WebDevelopment #Frontend #Programming #CleanCode #Hashnode

TypeScript: The "Second Pair of Eyes" that catches mistakes before they become bugs. Writing test automation in pure JavaScript can sometimes feel like a high-speed guessing game. It’s flexible and fast, until you hit that one undefined is not a function error deep in your execution. Moving your framework to TypeScript is like finally getting a roadmap for a territory where you previously had to rely on memory and luck. TypeScript acts as a vigilant sidekick, pointing out potential issues while you’re still typing, so you don't have to wait for a failing CI/CD pipeline to tell you something is wrong. Why adding types to your tests is a massive productivity boost: Autocomplete that actually works: Say goodbye to the "documentation ping-pong" where you constantly switch files just to check if an object property was named userID, userId, or u_id. With TS, your IDE knows exactly what’s inside your Page Objects and API responses, offering you perfect suggestions and saving you from those annoying failures driven by simple naming mismatches. Contracts that keep everyone honest: When testing APIs, you can define an Interface that acts as a blueprint for your data. If the backend team changes a field from a string to a number, your code will highlight the discrepancy immediately. It’s like having an automatic gatekeeper for your business logic. Refactoring without the "Scavenger Hunt": Need to rename a core method in your framework? In JS, it’s often a risky game of "Find and Replace" followed by hoping you didn't break a test in another folder. In TS, you rename it once, and the compiler instantly shows you exactly where updates are needed. It’s a clean, surgical way to evolve your code. Self-Documenting Code for the Win: Types serve as documentation that never goes out of date. When a new engineer joins the team, they don’t have to guess what a function expects—the code explains itself. This makes the onboarding process much smoother and reduces the "what does this variable actually do?" questions. Sustainable automation thrives on a balance between catching application bugs and keeping the test code itself reliable and maintainable. Adopting TypeScript allows your team to focus on the actual quality of the product, instead of spending time debugging the "identity crisis" of your JavaScript variables. Do you enjoy the total freedom of JavaScript, or do you prefer the organized structure of TypeScript? Let’s be honest: what’s the most time you’ve ever spent chasing a bug that turned out to be a classic type mismatch, like trying to map over an undefined that was supposed to be an array? #TypeScript #JavaScript #TestAutomation #SDET #CleanCode #SoftwareEngineering #TestGeeks

Why you should use TypeScript instead of JavaScript? If you’re still using plain JS for a growing automation framework, you’re basically inviting flaky tests into your codebase. Moving to TypeScript (TS) isn't just a "nice to have"—it’s a massive reliability upgrade for any AQA. Here’s why I always advocate for the rewrite: Catching "Dumb" Bugs Early: In JS, you find out you passed a string instead of an int to an API helper only when the test fails in CI. TS catches that typo while you're still writing the code. It turns runtime crashes into simple red squiggly lines in your IDE. The Code IS the Documentation: You don’t have to guess what a data object contains. By defining an interface, you know exactly which fields are available. It makes onboarding new QAs to the framework 10x faster because the types tell them how to use your methods. Autocompletion that Actually Works: Because TS understands your data structures, IntelliSense is actually helpful. You get real suggestions for your Page Objects and API models, which means way less time spent Alt-Tabbing back to the source code to check a method name. Fearless Refactoring: Renaming a core locator or a utility function in a large JS framework is terrifying because you might break a test 50 folders away. In TS, the compiler acts as a safety net. If a change breaks a contract somewhere else, the build fails immediately. Scale and Consistency: When multiple engineers are contributing to the same framework, TS enforces a standard. You can’t "silently" break a teammate’s helper function by passing the wrong data type—the contract is strictly enforced. If you're building a framework that needs to last, JavaScript is a gamble. TypeScript is an investment in stability

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

I've been writing JavaScript for years. And for years, I thought TypeScript was just extra work. I was wrong. Completely wrong. After switching to TypeScript full-time, my debugging time dropped by almost 40%. My code reviews became faster. Onboarding new devs became easier. And I stopped getting 3am calls about production bugs. Here's everything I wish someone had taught me before making the switch What is TypeScript, really? TypeScript is JavaScript - but with a superpower: a type system. It's a superset of JavaScript, which means every valid JS file is already valid TypeScript. You don't relearn the language. You extend it. TypeScript adds: - Static types (string, number, boolean, custom types) - Interfaces and type aliases - Enums - Generics - Type inference (TS is smart enough to guess types) - Compile-time error checking The TypeScript compiler (tsc) transpiles your .ts files back into plain JavaScript - so browsers and Node.js run it exactly the same. You write safer code. The machine handles the rest. Why JavaScript alone isn't enough anymore in Modern Web Apps JavaScript was built in 10 days in 1995. It was designed for tiny scripts - not 100,000-line enterprise apps, not distributed teams of 50 engineers, not systems that handle millions of users. In JS, this is perfectly valid code: function add(a, b) { return a + b; } add("5", 10); // Returns "510", not 15 No error. No warning. Just wrong behavior at runtime. In TypeScript: function add(a: number, b: number): number { return a + b; } add("5", 10); // ERROR at compile time - caught before it ships This is the core value of TypeScript: it moves bugs from runtime (when users feel it) to compile time (when only you see it).

🚀 Day 3 of #30DaysOfJavaScript (27 April 2026) Today I learned All types of Conditionals in JavaScript আজ আমি JavaScript-এর সব ধরনের Conditionals শিখেছি 📌 Conditionals (Definition | সংজ্ঞা) 👉 Conditionals are used to control the flow of a program based on conditions. 👉 Conditionals হলো এমন logic যেটা condition অনুযায়ী program-এর flow control করে।🔹 1. if Statement (Basic Condition) 👉 Runs code only if condition is true 👉 শুধু condition true হলে কাজ করে let age = 18; if (age >= 18) { console.log("Adult"); } 🔸 2. if...else Statement 👉 One block runs if true, another if false 👉 true হলে একটা, false হলে অন্যটা let age = 16; if (age >= 18) { console.log("Adult"); } else { console.log("Not Adult"); } 🔹 3. else if Ladder (Multiple Conditions) 👉 Used when multiple conditions exist 👉 একাধিক condition check করার জন্য let marks = 75; if (marks >= 80) { console.log("A+"); } else if (marks >= 60) { console.log("A"); } else { console.log("Fail"); } 🔁 4. switch Statement (Fixed Cases) 👉 Used for multiple fixed value checks 👉 fixed value compare করার জন্য let day = "Monday"; switch (day) { case "Monday": console.log("Start Week"); break; case "Friday": console.log("Weekend Coming"); break; default: console.log("Normal Day"); } ⚡ 5. Ternary Operator (Shortcut Condition) 👉 Short form of if...else 👉 ছোটভাবে condition লেখার shortcut let age = 20; let result = (age >= 18) ? "Adult" : "Not Adult"; ⚠️ Common Mistake 👉 Forgetting break in switch 👉 Complex logic in ternary makes code unreadable 🔥 Learning 👉 Conditionals are the core of decision-making in programming 👉 Programming logic build korar base holo conditionals #JavaScript #FullStackDeveloper #LearningInPublic #WebDevelopment #30DaysChallenge