Classes.js

Class.md

// PROTOTYPE WAY
function Person (props) {
  this.name = props.name
  this.age = props.age
}

Person.prototype.say = function (word) {
  console.log(`${this.name}: ${word}`)
}

// ES6 WAY
class Person {
  constructor({ name, age }) {
    this.name = name
    this.age = age
  }

  say(word) {
    console.log(`${this.name}: ${word}`)
  }
}

var person = new Person({ name: 'Daiki', age: 22 })
person.say('hello!')