Functional Programming in JavaScript

You do not need a functional library to write functional JavaScript. The array methods are enough.

Core Trio

const result = data
  .filter(x => x.active)
  .map(x => x.name)
  .reduce((acc, name) => acc + ", " + name, "")

• map transforms each element
• filter selects elements
• reduce accumulates to a single value

Avoid mutations. Prefer expressions over statements. Your code will be more predictable.