CodeRoll | Frontend

// обратите внимание: код выполняется в нестрогом режиме
let greeting
greetign = {} // опечатка!
console.log(greetign)

class Chameleon {
  static colorChange(newColor) {
    this.newColor = newColor
    return this.newColor
  }

  constructor({ newColor = "green" } = {}) {
    this.newColor = newColor
  }
}

const freddie = new Chameleon({ newColor: "pink" })
freddie.colorChange("orange")

let a = 3
let b = new Number(3)
let c = 3

console.log(a == b)
console.log(a === b)
console.log(b === c)

let c = { greeting: "Hey!" }
let d

d = c
c.greeting = "Hello!"
console.log(d.greeting)

console.log(+true)
console.log(!"John")

const shape = {
  radius: 10,
  diameter() {
    return this.radius * 2
  },
  perimeter: () => 2 * Math.PI * this.radius
}

console.log(shape.diameter())
console.log(shape.perimeter())