![]() The illustration has changed, as has the opening paragraphs. For example, the introductions between versions are nearly identical, with the same sections: “On Programming,” “Why Language Matters,” and so on. If you are a fan of the original, you will find much has not changed. In these contrasting quotes, I intentionally left some overlap to show that some of the language has not changed from one book to the other. ![]() In this book, I’m using the 2017 version of JavaScript. The language designers are careful to not make any changes that could break existing programs, so new browsers can still run old programs. The fact that the language is evolving means that browsers have to constantly keep up, and if you’re using an older browser, it may not support every feature. Since then we’ve had new, small updates every year. Then in 2015 version 6 came out, a major update that included some of the ideas planned for version 4. A version 6 is in the process of being finalized, and some browsers are starting to support new features from this version.īut the introduction of Eloquent Javascript 3rd edition says:Ĭhanging a living, widely used language in such a radical way turned out to be politically difficult, and work on the version 4 was abandoned in 2008, leading to a much less ambitious version 5, which made only some uncontroversial improvements, coming out in 2009. We’re now at the point where all major browsers support version 5, which is the language version that this book will be focusing on. The introduction of Eloquent Javascript 2nd edition says:Ĭhanging a living, widely used language in such a radical way turned out to be politically difficult, and work on the version 4 was abandoned in 2008, leading to the much less ambitious version 5 coming out in 2009. Because the 2nd edition of Javascript was released in 2014, that pre-dates the release of Javascript’s major update, ECMAScript 2015 or ES6. In the introduction of both Eloquent Javascript 3rd edition and 2nd edition, you find a detailed history of Javascript. Difference 1: Eloquent Javascript 2nd Edition Does Not Cover ES6 For this article, I do not intend to focus on the small differences, but the bigger, high-impact ones. For example, the 2nd edition has two separate chapters for HTTP and forms, whereas in Eloquent Javascript 3rd edition, the two chapters are combined. The order of chapters and the chapters titles are the same, with some minute differences. ![]() If you read the 2nd edition, you will find that the structure, including chapters and sections, are nearly-identical, with whole swaths of conceptual paragraphs unchanged. 3 Differences: Eloquent Javascript 2nd Edition vs 3rd Editionīefore diving into the big differences between Eloquent Javascript 3rd edition and 2nd edition, you may wonder what is the same. ![]()
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