JavaScript

Debugging JavaScript Like a Senior Engineer Deep Dive JavaScript

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🟦 JavaScript Deep Dive — Issue #11 (Season 2 Kickoff) Debugging JavaScript Like a Senior Engineer How experts actually find bugs — and why juniors get stuck Most JavaScript bugs aren’t hard because the code is complex.They’re hard because we debug the wrong way. Senior engineers don’t “try random fixes.”They follow systems, mental models, and … Read more

100 Node.js Coding Snippets

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https://github.com/lsvekis/100-NodeJS-Snippets 1) Basic “Hello World” HTTP server What it does: Starts a basic HTTP server on port 3000.Use it for: Quick sanity checks, learning request/response basics. 2) Minimal server with routing (no frameworks) What it does: Routes by URL with if statements.Use it for: Tiny services, prototypes, understanding routing fundamentals. 3) Read JSON body from … Read more

Build a Game with JavaScript DOM Target Reaction Game

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JavaScript DOM Game Dev (Beginner-Friendly): Build a “Reaction + Score” Click Game If you can select an element, listen for a click, and update text on the page, you can build a game. The DOM (Document Object Model) is the browser’s “live” representation of your HTML. When you write JavaScript that changes what’s on screen—moving … Read more

Node.js Interview Quiz 100 Questions

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🚀 Node.js Interview Quiz (100 Questions with Answers) 1️⃣ Node.js Fundamentals (1–15) 1) What is Node.js? Answer: A JavaScript runtime built on Chrome’s V8 engine.Explanation: Node.js allows JS to run outside the browser, mainly for servers and tooling. 2) Is Node.js single-threaded? Answer: Yes (but it uses background threads).Explanation: JS runs on one thread, but … Read more

100-Question JavaScript Interview Quiz

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1) Basics, Types, Coercion (1–15) 1) What is the result of typeof null? A) “null” B) “object” C) “undefined” D) “number”Answer: B Explanation: A long-standing JS quirk: typeof null returns “object”. 2) What does NaN === NaN evaluate to? A) true B) falseAnswer: B Explanation: NaN is not equal to anything, even itself. Use Number.isNaN(x). … Read more

Building AI Powered JavaScript Applications JavaScript Deep Dive

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🟦 JavaScript Deep Dive — Issue #10 (Final) Building AI-Powered JavaScript Applications (Without Losing Control) How to integrate AI responsibly, predictably, and maintainably in real-world JS apps AI is no longer a novelty in JavaScript applications.It’s becoming infrastructure — used for search, assistants, personalization, content generation, tutoring, analytics, and automation. But most examples online focus … Read more

The Future of JavaScript whats coming next

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🟦 JavaScript Deep Dive — Issue #9 The Future of JavaScript: What’s Coming Next (And What Actually Matters) New language features, real-world impact, and what to learn vs ignore Every year brings new JavaScript features, proposals, APIs, and “next big things.”Some of them quietly improve everyday development.Others sound exciting… and never really change how we … Read more

JavaScript Coding Exercises 21-35

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If you’re serious about improving your JavaScript skills, reading alone isn’t enough — you need structured, real-world practice. I’ve just published 30 additional JavaScript coding exercises (Exercises 21–50), each one including:✅ Full, working code✅ Clear learning objectives✅ Step-by-step explanations✅ Practical DOM, async, and browser API examples This set goes beyond basics and helps you practice … Read more

Vibe Coding with JavaScript Learn to Think, Not Just Type Code

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Free Until December 31, 2025 https://www.amazon.com/dp/B0G9C4G9LS https://www.amazon.ca/dp/B0G9C4G9LS Learning JavaScript today is harder than it should be. Not because JavaScript is impossible — but because most learning paths skip the most important part: How to think. You’re expected to jump from tutorial to tutorial, memorize syntax, copy framework patterns, and now… accept AI-generated code without fully … Read more

Two Number 1 Bestselling Tech Books FREE on Kindle Until Dec 28

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🚀 Two #1 Bestselling Tech Books For a limited time, two of my bestselling books on Amazon are completely free on Kindle—and they’re currently sitting at #1 and #2 in their categories. If you’ve ever wanted to truly understand JavaScript or finally make sense of how AI actually works, this is the best possible moment … Read more