--- product_id: 23373291 title: "You Don't Know JS: Types & Grammar" price: "€ 60.67" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.be/products/23373291-you-dont-know-js-types-and-grammar store_origin: BE region: Belgium --- # You Don't Know JS: Types & Grammar **Price:** € 60.67 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** You Don't Know JS: Types & Grammar - **How much does it cost?** € 60.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/23373291-you-dont-know-js-types-and-grammar) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description No matter how much experience you have with JavaScript, odds are you don’t fully understand the language. As part of the "You Don’t Know JS" series, this compact guide explores JavaScript types in greater depth than previous treatments by looking at type coercion problems, demonstrating why types work, and showing you how to take advantage of these features. Like other books in this series, You Don’t Know JS: Types & Grammar dives into trickier parts of the language that many JavaScript programmers simply avoid or assume don’t exist (like types). Armed with this knowledge, you can achieve true JavaScript mastery. With this book you will: Get acquainted with JavaScript’s seven types: null, undefined, boolean, number, string, object, and symbol Understand why JavaSript’s unique array, string, and number characteristics may delight or confound you Learn how natives provide object wrappers around primitive values Dive into the coercion controversy―and learn why this feature is useful in many cases Explore various nuances in JavaScript syntax, involving statements, expressions, and other features Review: Teaches you the nuances and details you never studied. - I'm not a noob for JavaScript, but I'm not an expert either. Up until now, I've been using a minimal of JS to develop small single page apps to manage my Java web apps. Things have changed and now, I'm expected to become a "Full Stack Developer" concentrating on the Front end of my Apps. This is where this book (and ALL the others in this series) excel. Those of us that learned "just enough JavaScript" to get by can eat this stuff up. In this book and the entire series, Kyle presents the good, bad and fugly of JavaScript. He tells you how to implement best practices and how to get around and even embrace some of the ugly parts of JavaScript. He tells you WHY some of the "features (not bugs)" were implemented and HOW the JS "compiler" implements the features of JS. This is EXTREMELY helpful in understanding the language (I wish there were Java books like this.) These are not beginner books, but I would say that EVERY JavaScript Developer should read and have on their Kindle or Bookshelf. It should be REQUIRED reading for those who want to become JS experts. And I LOVE Kyle's style of writing. It hooks you and keeps you interested. Thank you Kyle Simpson for such great books. Review: You really don't know Javascript... Finally a book series that covers the language like no other. Start the series @ second book - This is on of a series of books on JavaScript. Do yourself a favor and buy he series. It's absolutely the best information I have read on the js language. This is the third book in the series. The first book seems to be for complete newbies, but the rest of the series covers language concepts, how the engine processes the code, and it leads you to the promise land of understanding how to use the language optimally, and shines a light on how many have gone to great length to use the language like in a object oriented fashion, and failed. I walk away with a clear understanding of how I want to use javascript from now on. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #537,284 in Books ( See Top 100 in Books ) #77 in JavaScript Programming (Books) #352 in Computer Programming Languages #1,146 in Programming Languages (Books) | | Customer Reviews | 4.7 out of 5 stars 174 Reviews | ## Images ![You Don't Know JS: Types & Grammar - Image 1](https://m.media-amazon.com/images/I/919-DzRGiZL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Teaches you the nuances and details you never studied. *by S***L on August 4, 2016* I'm not a noob for JavaScript, but I'm not an expert either. Up until now, I've been using a minimal of JS to develop small single page apps to manage my Java web apps. Things have changed and now, I'm expected to become a "Full Stack Developer" concentrating on the Front end of my Apps. This is where this book (and ALL the others in this series) excel. Those of us that learned "just enough JavaScript" to get by can eat this stuff up. In this book and the entire series, Kyle presents the good, bad and fugly of JavaScript. He tells you how to implement best practices and how to get around and even embrace some of the ugly parts of JavaScript. He tells you WHY some of the "features (not bugs)" were implemented and HOW the JS "compiler" implements the features of JS. This is EXTREMELY helpful in understanding the language (I wish there were Java books like this.) These are not beginner books, but I would say that EVERY JavaScript Developer should read and have on their Kindle or Bookshelf. It should be REQUIRED reading for those who want to become JS experts. And I LOVE Kyle's style of writing. It hooks you and keeps you interested. Thank you Kyle Simpson for such great books. ### ⭐⭐⭐⭐⭐ You really don't know Javascript... Finally a book series that covers the language like no other. Start the series @ second book *by D***D on July 13, 2015* This is on of a series of books on JavaScript. Do yourself a favor and buy he series. It's absolutely the best information I have read on the js language. This is the third book in the series. The first book seems to be for complete newbies, but the rest of the series covers language concepts, how the engine processes the code, and it leads you to the promise land of understanding how to use the language optimally, and shines a light on how many have gone to great length to use the language like in a object oriented fashion, and failed. I walk away with a clear understanding of how I want to use javascript from now on. ### ⭐⭐⭐⭐⭐ 1UP to the series *by I***X on March 11, 2015* Awesome book! Content is clear, easy to understand, but deep enough to really cover all the fundamentals. Recommended for anyone, who is familiar with JavaScript and wants to get a deeper understanding of what is going on beneath the hood. This is especially important for front-enders, who never really touch many important aspects of JavaScript and writing efficient, well-thought code is a major problem for them. ## Frequently Bought Together - You Don't Know JS: Types & Grammar - You Don't Know JS: Async & Performance - You Don't Know JS: this & Object Prototypes --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/23373291-you-dont-know-js-types-and-grammar](https://www.desertcart.be/products/23373291-you-dont-know-js-types-and-grammar) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-23*