The specification mentions neither ES6 nor ES2015, though.
This means that if either a or b is not passed, the required() function is called and you’ll get an error. Officially, the name is ECMAScript 2015 Language and its the 6th Edition of the ECMA-262 standard. In the following example, we are setting the required() function as the default value for both a and b parameters. New Features in ES6 The let keyword The const keyword Arrow Functions The.
This chapter describes the most important features of ES6. ECMAScript 2015 is also known as ES6 and ECMAScript 6. Enforcing required parametersĮS6 provides default parameter values that allow you to set some default value to be used if the function is called without that parameter. ECMAScript 2015 was the second major revision to JavaScript. If you know of other tips, please let me know in the comment and I’ll be happy to add them. we will demonstrate how to use some of the functionalities of ES2015, which may be useful in everyday JavaScript coding. I wanted to list and discuss some of them, since I think you’ll find them useful. In this article, the first of a series titled From JavaScript developer to JavaScript engineer, Ill discuss how to re-implement ECMAScript 2015s String. Beginning with ECMAScript 2015, the ECMAScript language includes syntactic class definitions that permit programmers to concisely define objects that conform to the same class-like abstraction pattern used by the built-in objects. By rajaraodv Check out these useful ECMAScript 2015 (ES6) tips and tricks Photo by Glenn Carstens-Peters on UnsplashĮcmaScript 2015 (aka ES6) has been around for couple of years now, and various new features can be used in clever ways. The ECMAScript built-in objects themselves follow such a class-like pattern.
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