JavaScript DOM lessons

The Future of JavaScript whats coming next

by

🟦 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

by

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

The Weird the Subtle and the Powerful in JavaScript Book Free First 3 Chapters

by

The Weird, the Subtle, and the Powerful in JavaScript Get the book on Amazon Free until Dec 27th US Link Canada Link https://www.amazon.com/dp/B0GBTM5SCY https://www.amazon.ca/dp/B0GBTM5SCY GitHub Repohttps://github.com/lsvekis/The-Weird-the-Subtle-and-the-Powerful-in-JavaScript Introduction Why JavaScript Is Weird — and Why That’s a Good Thing JavaScript is one of the most widely used programming languages in the world—and also one of the … Read more

JavaScript Architecture Patterns for Large Applications

by

🟦 JavaScript Deep Dive — Issue #8 JavaScript Architecture Patterns for Large Applications How to structure code that scales without collapsing under its own weight Small JavaScript projects forgive bad structure.Large ones punish it relentlessly. As applications grow, the biggest challenges are no longer syntax or APIs — they’re: This issue focuses on architecture patterns … Read more

Closures Scope and Memory What Really Happens Under the Hood

by

🟦 JavaScript Deep Dive — Issue #7 Closures, Scope & Memory: What Really Happens Under the Hood Why closures are powerful, dangerous, and often misunderstood Closures are one of JavaScript’s greatest superpowers — and one of its most common sources of bugs, memory leaks, and confusion. Most developers use closures.Far fewer truly understand what they … Read more

How JavaScript Engines Optimize Your Code

by

🟦 JavaScript Deep Dive — Issue #6 How JavaScript Engines Optimize Your Code A practical V8 (and JS engine) deep dive every serious JS dev should understand Most JavaScript developers write code assuming the engine will “just handle it.” And often, it does. But once performance matters — large apps, data-heavy UIs, animations, AI workloads, … Read more

Advanced Async and Concurrency Patterns in JavaScript

by

🟦 JavaScript Deep Dive — Issue #5 Beyond Promises: Advanced Async & Concurrency Patterns in JavaScript How modern JS handles real-world async workloads at scale Promises and async/await made JavaScript easier to read — but they didn’t magically solve concurrency, coordination, cancellation, or backpressure. As apps grow more complex (AI calls, streaming APIs, real-time UIs, … Read more

Functional Programming Superpowers in JavaScript

by

🟦 JavaScript Deep Dive — Issue #4 Functional Programming Superpowers in JavaScript How FP techniques make your code cleaner, safer, more predictable — and easier to scale. Functional Programming (FP) isn’t a trend.It’s a set of powerful patterns that make code easier to reason about, test, reuse, and extend. Modern JavaScript frameworks — React, Svelte, … Read more

Modern JavaScript Performance Patterns 2025 Edition

by

🟦 JavaScript Deep Dive — Issue #3 Modern JavaScript Performance Patterns (2025 Edition) How to Write Faster, Smoother, More Efficient JS in a Modern Front-End World JavaScript performance isn’t just about shaving a few milliseconds.It affects: And with modern apps becoming more interactive — and LLM-driven apps doing async work at scale — understanding performance … Read more

JavaScript Deep Dive — Issue #2

by

Mastering the Event Loop: Microtasks, Macrotasks & Hidden Async Behaviors If there’s one concept that separates intermediate JavaScript developers from true experts, it’s this: Understanding the event loop — not just at a surface level, but deeply. Every framework, every asynchronous operation, every browser interaction ultimately depends on the event loop.But many developers still can’t … Read more