Chapter 7. ECMAScript 6

So far, we have taken a detailed tour of the JavaScript programming language. I am sure that you must have gained significant insight into the core of the language. What we saw so far was as per the ECMAScript 5 (ES5) standards. ECMAScript 6 (ES6) or ECMAScript 2015 (ES2015) is the latest version of the ECMAScript standard. This standard is evolving and the last round of modifications was done in June, 2015. ES2015 is significant in its scope and the recommendations of ES2015 are being implemented in most JavaScript engines. This is great news. ES6 introduces a huge number of features that add syntactic forms and helpers that enrich the language significantly. The pace at which ECMAScript standards keep evolving makes it a bit difficult for browsers and JavaScript engines to support new features. It is also a practical reality that most programmers have to write code that can be supported by older browsers. The notorious Internet Explorer 6 was once the...