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Can you write JavaScript in a functional programming style?
You can write JavaScript in a functional programming style, with its first-class functions, or even in an imperative style (C-like). In case you're wondering, JavaScript has nothing to do with Java, it's a poor name choice but we have to live with it. Update: You can now get a PDF and ePub version of this JavaScript Beginner's Handbook.
What is a class keyword in JavaScript?
The class keyword starts a class declaration, which allows us to define a constructor and a set of methods all in a single place. Any number of methods may be written inside the declaration’s braces. The one named constructor is treated specially. It provides the actual constructor function, which will be bound to the name Rabbit.
How to write JavaScript?
You can write JavaScript using an object-oriented paradigm, using prototypes and the new (as of ES6) classes syntax. You can write JavaScript in a functional programming style, with its first-class functions, or even in an imperative style (C-like).
What is JavaScript?
JavaScript was introduced in 1995 as a way to add programs to web pages in the Netscape Navigator browser. The language has since been adopted by all other major graphical web browsers.

Can you write JavaScript in a functional programming style?