SOURCE

function animal(name, sex){
    let obj = new Object()
    obj.name = name
    obj.sex = sex
    obj.name = name
    obj.saySex = function () {
        return `${this.name}的性别是${this.sex}`
    }
  return obj
}
let monkey = animal('猴子', '母')
console.log(monkey.name) //猴子
console.log(monkey.saySex())
console.log(monkey instanceof animal)
console.log(monkey instanceof Object)

function cake(name, price) {
  this.name = name
  this.price = price
  this.sayPrice = function () {
    return (`${this.name}的价格是${this.price}`)
  }
}
let crepeCake = new cake('千层', '￥12')
console.log(crepeCake.name) //千层
console.log(crepeCake.sayPrice() )

console.log(crepeCake instanceof cake)
console.log(crepeCake instanceof Object)