How TypeScript knows types from JavaScript libraries with .d.ts files

Came across a really clear article on the JavaScript Event Loop: “𝐓𝐡𝐞 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐄𝐯𝐞𝐧𝐭 𝐋𝐨𝐨𝐩 𝐄𝐱𝐩𝐥𝐚𝐢𝐧𝐞𝐝 𝐰𝐢𝐭𝐡 𝐄𝐱𝐚𝐦𝐩𝐥𝐞𝐬” short and practical. Great refresher on async tasks, microtasks vs macrotasks, and how the event loop works. The examples make it easy to connect theory with real code. If you work with JS, definitely worth a read! 🔗 https://lnkd.in/gwqhBxim #JavaScript #FrontendDevelopment #WebDevelopment #DeveloperLearning #React #EventLoop

I ran this JavaScript snippet, and the output completely surprised me 😳. Day 10: How JavaScript actually handles a async operations ⚙️. 🧠 Logic: 🔹 JS execution always starts with synchronous code -> so "start", "First" & "end" log first. 🔹 Inside the loop, setTimeout is added to macrotask queue (it will run later). 🔹 Promise.then() is added to microtask queue (these will run right after sync code), cause of high priority then macrotask queue. 🔹 Inside asyncFn(), when execution hits await it pauses that function exec & waits for promise to get resolve. 🔹 In the mean time, event Loop continue with promise callback in microTask, one it's completed, the promise get resolved in asyncFn() & then it prints ("Second") to console. 🔹 And the last, the setTimeout callback in macroTask queue gets executed. So:  ✅ Promise run first (microTasks). ⏱️ SetTimeout run after (macroTasks). That's why promise 0, promise 1, promise 2, and Second appear before all TimeOut logs. #Javascript #InterviewPrep  #100DaysOfCode #CodingChallenge  #JavaScript #CodingInterview #JSChallenges

Ever wondered how JavaScript actually runs your code behind the scenes? 👀 I’ve created a quick-reference cheat sheet on JavaScript’s Dynamic Runtime — covering the Execution Context, Call Stack, Heap, Event Loop, and how JS manages async operations through its task queues. Feel free to download and share the PDF. Hope it helps! ⚡ #JavaScript #FrontendDevelopment #ProgrammingTips #AsyncProgramming #WebDev #JSRuntime #Developers #TechLearning

🧠 JavaScript Functional Programming Cheat Sheet ✅ Pure functions & immutability 🧩 Higher-order functions & composition 🔁 Map / Filter / Reduce & currying ⚡ Generators & lazy evaluation The Complete Dev Roadmap with SaaS Boilerplate ➡️ https://champ.ly/-FLdfic_ --- If you found this guide helpful, follow TheDevSpace for more tips, tutorials, and cheat sheets on web development. Let's stay connected! 🚀 Also follow 👉 W3Schools.com & JavaScript Mastery to learn web development. #javascript #js #webdevelopment #WebDevelopment #JavaScript #FunctionalProgramming #CheatSheet #Frontend

🚀 Day 808 of #900DaysOfCode 🔹 Promises in JavaScript — Explained Simply! Promises are one of the most powerful features in JavaScript when dealing with asynchronous operations — like fetching data, reading files, or making API calls. In today’s post, I’ve broken down: ✅ What Promises are and why they exist ✅ How `.then()`, `.catch()`, and `.finally()` work ✅ Real-world examples to visualize how Promises handle async flow If you’ve ever struggled to understand how JavaScript handles waiting without blocking, this post will make it crystal clear. ✨ 💬 What’s one tricky thing about Promises that confused you when you first learned them? Drop it in the comments 👇 #Day808 #learningoftheday #900daysofcodingchallenge #JavaScript #AsyncJS #Promises #WebDevelopment #FrontendDevelopment #LearnToCode

#TIL The “You Don’t Need” series is a great reality check for many long-lived JS habits. One of the classics: You don’t need Lodash anymore. Most of its utilities are now built into the language — Array.flatMap, Object.entries, String.replaceAll, and so on. And for teams who still want familiar APIs, there’s a modern alternative: ES Toolkit — smaller, faster, actively maintained, fully typed, and even Lodash-compatible. Resources worth checking: • https://lnkd.in/e_VkCk_Y • https://lnkd.in/e7wCZBQx • https://es-toolkit.dev/ Lodash/Underscore has served us well — but modern JS gives us cleaner, faster, and native ways to get the same job done. #JavaScript #Frontend #WebDevelopment #Performance #Tooling #YouDontNeedSeries

🧠 Understanding the `this` Keyword in JavaScript One of the most confusing yet powerful concepts in JavaScript — the `this` keyword — is something every developer must deeply understand. In today’s post, I’ve covered: ✅ What `this` actually refers to in different contexts ✅ How it behaves inside functions, objects, and classes ✅ Common mistakes developers make ✅ Practical examples to master its behavior If you’ve ever found `this` acting unexpectedly in your code, this post will clear it all up once and for all. 💬 What’s the most confusing part of `this` for you? Share your thoughts in the comments 👇 #JavaScript #FrontendDevelopment #WebDevelopment #CleanCode #CodingCommunity #JSBasics #ProgrammingTips

🧠 Understanding the `this` Keyword in JavaScript One of the most confusing yet powerful concepts in JavaScript — the `this` keyword — is something every developer must deeply understand. In today’s post, I’ve covered: ✅ What `this` actually refers to in different contexts ✅ How it behaves inside functions, objects, and classes ✅ Common mistakes developers make ✅ Practical examples to master its behavior If you’ve ever found `this` acting unexpectedly in your code, this post will clear it all up once and for all. 💬 What’s the most confusing part of `this` for you? Share your thoughts in the comments 👇 #JavaScript #FrontendDevelopment #WebDevelopment #CleanCode #CodingCommunity #JSBasics #ProgrammingTips

10+ JavaScript Best Practices You Need to Implement Today! Description: Just dropped a quick guide on fundamental JavaScript best practices! Applying these simple rules leads to cleaner code, improved performance, and significantly easier debugging. Key takeaways include: Minimizing global scope. Using strict equality (===). Avoiding object constructors (e.g., use {} instead of new Object()). Placing all declarations at the top of your scripts. Check out the full guide for tips on variable declaration, type handling, switch statements, and why you should avoid eval(). What's your favorite tip for writing better JS? #JavaScript #CodingStandards #DevTips #Frontend

🚀 JavaScript Hoisting Explained (Simply!) Hoisting means JavaScript moves all variable and function declarations to the top of their scope before code execution. If that definition sounds confusing, see this example 👇 console.log(a); var a = 5; Internally, JavaScript actually does this 👇 var a; // declaration is hoisted (moved up) console.log(a); a = 5; // initialization stays in place ✅ Output: undefined --- 🧠 In Short: > Hoisting = JS reads your code twice: 1️⃣ First, to register variables & functions 2️⃣ Then, to execute the code line by line --- 💡 Tip: var → hoisted & initialized as undefined let / const → hoisted but not initialized (stay in Temporal Dead Zone) --- #JavaScript #Hoisting #WebDevelopment #CodingTips #JSInterview #Frontend #React #100DaysOfCode