Advanced JavaScript: Patterns, Performance, and the Tools of Professional Developers (Practical Programming) by Jacob Ren
English | June 28, 2026 | ASIN: B0H6TYD48B | 149 pages | EPUB | 0.17 Mb
This is the book that makes the language make sense.
Most JavaScript developers know how to use the language. Fewer understand how it actually works - what the engine does, why closures behave the way they do, what the event loop is really doing, and why the code they wrote is slow. Advanced JavaScript is for the developer who wants to close that gap for good.
This book doesn't just teach you more syntax. It teaches you how to think like a senior developer - in patterns, tradeoffs, and systems.
What's inside:
Under the hood: The V8 engine, the call stack, execution contexts, the scope chain, and how the event loop actually processes microtasks and macrotasks - with clear, practical implications for your code
Advanced OOP: Prototypal inheritance, the class keyword decoded, private fields, Proxy and Reflect, generators, Symbols, and iterators
Functional programming: Currying, memoization, the Maybe pattern, function composition, and recursion with trampolining
Async mastery: AbortController, Web Workers for true parallelism, building an event emitter from scratch, debounce and throttle implemented properly
Design patterns: Factory, Builder, Observer, Strategy, State Machine, Decorator, and Facade - with real, production-grade JavaScript examples
Performance: Profiling with DevTools flame charts, avoiding memory leaks, DOM batching, lazy loading with dynamic import, and Intersection Observer
Modern tooling: TypeScript fundamentals, unit testing with Jest, Node.js file system and HTTP servers
Capstone: Build a reactive state management system from scratch (think mini-Redux), plus security, the JavaScript ecosystem map, and senior developer thinking patterns
This book is for you if:
You've been writing JavaScript for a while and want to understand it at a deeper level
You're preparing for senior developer roles or technical interviews
You want to understand how frameworks like React and Redux actually work under the hood
Every concept is grounded in real use cases. Nothing is academic for the sake of it. If it's in this book, it's because you'll encounter it in production code.
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