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Understanding ECMAScript 6 by Nicholas C. Zakas

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INTRODUCTION

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The JavaScript core language features are defined in the ECMA-262 standard. The language defined in this standard is called ECMAScript. What you know as JavaScript in browsers and in Node.js is actually a superset of ECMAScript. Browsers and Node.js add more functionality through additional objects and methods, but the core of JavaScript remains as defined in ECMAScript. The ongoing development of ECMA-262 is vital to the success of JavaScript as a whole, and this book covers the changes brought about by the most recent major update to the language: ECMAScript 6.

The Road to ECMAScript 6

In 2007, JavaScript was at a crossroads. The ...

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