What are .d.ts files in TypeScript?

JavaScript or TypeScript — which one should you really learn first? Here’s the simple roadmap no one explains clearly 👇 🧭 Step 1 – Learn JavaScript first. Understand the core: variables, functions, objects, arrays, and async logic. Without this, TypeScript will feel like a wall. ⚙️ Step 2 – Feel the pain. After building a few projects, you’ll notice JS doesn’t warn you about errors until it’s too late. That’s where TypeScript shines. 💡 Step 3 – Move to TypeScript. It adds types to your JS — making your code more predictable, scalable, and easier to debug. 📈 When to use each: Use JavaScript for quick prototypes or small scripts. Use TypeScript for large, long-term projects, especially with teams. Mastering both will make you unstoppable in modern development. 👉 Which one are you using right now — JS or TS? #JavaScript #TypeScript #Programming #CareerGrowth #WebDevelopment

Very well articulated Greg Munt More engineers should apply Systems Thinking, Objective Critical Thinking and ROI Thinking (personal and organisational) when using libraries and frameworks. Don't just use something because you are shamed into using it or derive Ego Inflation and Illusory Superiority because you've adopted the Established Dogma without questioning it's validity for yourself. Critically evaluate and pay attention to the Second Order Effects of adopting certain socially 'accepted' approaches.

if you write javascript and you’re good at typescript, 𝘁𝘆𝗽𝗲𝘀𝗰𝗿𝗶𝗽𝘁 should always be your default choice — no matter the project size or stage. regular javascript is just too loose. the lack of type safety can feel fine for small scripts (like a database migration), but while building applications, you really don’t want to half your time chasing weird runtime errors that typescript would’ve caught in seconds. for me, type safety isn’t something to compromise on when it comes to programming. not even if i’m working on an MVP. typescript is the only typed version of javascript, so taking advantage of that structure pays off early. and here’s the kicker: migrating to typescript after you’ve built using regular javascript is more painful than just starting with it. you don’t actually gain speed by skipping typescript, you just delay the cost.

💡Amazing JavaScript Facts Every Learner Should Know! When I started learning JavaScript, I used loops, functions, and arrays almost every day — but later I realized there are some shocking little facts hidden inside them 👀👇 1️⃣ Functions are also objects! You can assign them to variables, pass them as arguments, or even return them from another function. 👉 Example: function greet() { return "Hello"; } greet.message = "Hi from function!"; console.log(greet.message); // Hi from function! 2️⃣ You can loop through arrays in different ways — and they behave differently! 👉 for...of gives values, but for...in gives indexes! const arr = ['a', 'b', 'c']; for (let i in arr) console.log(i); // 0,1,2 for (let val of arr) console.log(val); // a,b,c 3️⃣ Arrays are special objects in disguise! That’s why typeof [] returns "object" 😄 console.log(typeof []); // "object" 4️⃣ Functions inside loops can surprise you! If you use var, all functions share the same variable; but let creates a new one each time. 👉 Small change, big difference! 5️⃣Arrays don’t always behave like “normal arrays”! const arr = [1, 2, 3]; arr[10] = 99; console.log(arr.length); // 11 😳 Yes — JavaScript fills the gap with empty slots, not undefined! 💬 Which one did you already know — and which surprised you the most? Let’s see how many JS lovers spot all 😎 #JavaScript #CodingJourney #FrontendDevelopment #DeveloperTips #LearnByDoing

Mastering Type Annotations in TypeScript: A Beginner’s Guide TypeScript makes JavaScript smarter — and Type Annotations are the brain behind it. 🧩 Type annotations let you explicitly define the type of a variable, function parameter, or return value in TypeScript. :) followed by the type. let message: string = "Hello, TypeScript!"; function add(a: number, b: number): number { Here: message is a string a and b are numbers The function add returns a number 🎯 Why Use Type Annotations? Even though TypeScript can infer types, using explicit annotations gives you more control and clarity. ✅ Clarity & Readability – self-documenting code Error Detection – catch mistakes before runtime IDE Support – better autocompletion and refactoring Let’s explore the most common use cases 👇 let name: string = "Alice"; These ensure that each variable holds only the correct type of data. You can annotate arrays in two ways: let numbers: number[] = [1, 2, 3]; Both are valid; pick your preferred style. function printPerson(person: { name: string; age: https://lnkd.in/gzNntDVG

🚀 Day 1 : Pathway to Next.js — Understanding JavaScript Behind the Scenes Before diving into Next.js, it’s essential to understand how JavaScript actually runs your code behind the scenes. Every program begins with the Global Execution Context (GEC) — the environment where all variables and functions are stored in memory before any code is executed. JavaScript executes code in two main phases: ✨ Memory Creation Phase — variables are assigned undefined, and functions are stored as complete objects. ⚡ Execution Phase — actual values are assigned, and functions are invoked line by line. When a function is called, JavaScript creates a new Function Execution Context (FEC) exclusively for that function. Each FEC has its own memory space and execution flow. Once the function finishes running, the FEC is destroyed, and control returns to the Global Context. Behind the scenes, everything is managed by the Call Stack, which keeps track of which execution context is currently active: 🧠 The Global Execution Context stays at the bottom. 🧩 Each function call is pushed onto the top of the stack. 🔁 Once the function completes, it’s popped off, and JavaScript continues execution from the previous context. This entire process of creating, pushing, and popping Execution Contexts defines JavaScript’s single-threaded, synchronous nature. 🔥 Key Takeaway: Understanding Execution Contexts and the Call Stack is the foundation for mastering asynchronous programming, closures, promises, and the event loop — the core concepts that power frameworks like Next.js.