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Explore the inner workings of the world's most popular programming language and enjoy the power and control that comes only from deep knowledge! In this book, JavaScript and Node legend James M. Snell goes beyond the basic syntax and common implementations to expose the secrets of its engines, runtimes, and language design decisions.
Written by core Node.js and TC-39 committee contributor James M. Snell, this book teaches you what's really happening when JavaScript handles asynchronous tasks, manages memory, or interacts with system APIs. This interesting and entertaining book is filled with insights that you reason better about your code, your tools, and your runtime environments.
In JavaScript in Depth, you will learn how to:
• Take advantage of the internals of the JavaScript language
• Understand how runtimes like Node.js, Deno, and Bun differ
• Discover how features like streams, file systems, and crypto APIs really work
• Avoid common performance traps and subtle bugs
About the book
JavaScript in Depth isn't a ?how-to? guide?it's a ?how it works? guide. In it, you'll find detailed code samples, in-depth technical breakdowns, and real examples drawn from production environments, all connecting JS theory to everyday development. You'll see how JS engines execute code and interact with system APIs, how runtimes power your applications, and why JavaScript behaves the way it does. Whether you read it cover to cover or dip in as for easy reference, this book will help you refresh obscure topics, troubleshoot complex bugs, and make the best use of AI-generated code snippets.
About the reader
This book is written to turn JavaScript beginners into JavaScript veterans, with a deep understanding of the language.
About the author
James M. Snell is a core contributor to Node.js and a member of the Node.js Technical Steering Committee. He is a senior principal engineer on the Cloudflare Workers runtime and a delegate on TC-39, the ECMA committee that defines the JavaScript language. He has dedicated his career to open source, open standards, and open governance.
