Key difference between OOP and FP in JavaScript

OOP-and-FP.md

Key difference between OOP and FP in JavaScript

In OOP we have mixed instance data and class functions:

class Animal { 
  constructor(name) {
    this.name = name;
  }
  speak() {
    console.log(this.name + ' makes a noise.');
  }
}
const instance = new Animal('Johny');
instance.speak();

In Functional Programming we have instance data and functions seperated:

const createAnimal = (name) => (this_) => {
  this_.name = name;
};
const speak = () => (this_) => {
  console.log(this_.name + ' makes a noise.');
};
const instance = {};
createAnimal('Johny')(instance);
speak()(instance);