ashish kumar @WebdevAshishk
I am frontend web developer doing all things creative to make the web a more unique and awesome place. Joined March 2023-
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Synchronous: Tasks run one after another, waiting for each to finish. Asynchronous: Tasks can run independently, without waiting.🧠 Tip: Use async when tasks take time (like network calls) to avoid blocking the rest of the code.
🧠 Lexical Scope vs Closure 🔹 Lexical Scope: Inner function can see outer variables. 🔹 Closure: Inner function remembers outer variables even after outer is done. 📌 Scope gives access. 📌 Closure keeps it. #JavaScript #LexicalScope #Closures
🚀 Lexical Scope vs Lexical Environment (JS) 🧠 Lexical Scope = Where variables/functions are defined in the code. 🔍 Lexical Environment = How JS stores/manages them during execution (includes current vars + outer refs).
🧠 JavaScript Tip: Temporal Dead Zone (TDZ) Ever got a ReferenceError before your variable even existed? 💪🏾That’s TDZ in action! When using let or const, the variable is hoisted but not initialized. Accessing it before declaration = ReferenceError.
💡 Shallow Copy vs Deep Copy in JavaScript 🔹 Shallow Copy: Copies only top-level data. Nested objects still linked. 🔹 Deep Copy: Copies everything — fully independent
🧠 JavaScript Trick You Should Know Ever confused between ?? (Nullish Coalescing) vs || (Logical OR)? They look similar but behave differently! 👉 || returns the right side if the left is falsy 👉 ?? returns the right side only if the left is null or undefined
Here are some unofficial yet powerful JavaScript concepts that often pop up in interviews and real-world code — but aren’t part of the official language spec.
JavaScript can be tricky! From hoisting and closures to this and async behavior, even experienced devs get confused. Mastering these tricky parts—like == vs ===, scope, and references—can make you a better coder. 💡 What topic still confuses you in JS? #JavaScript #WebDevelopment
🚀 Just completed my first TypeScript project from scratch! 🎉 TypeScript Tailwind CSS React Router DOM Parcel Check it out here and let me know what you think! 🙌 [rest-country-by-ashishk.netlify.app] ✨ #TypeScript #TailwindCSS #ReactRouterDOM #Parcel #WebDev
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