let cat1 = { name: 'nac', age: 11 } let cat2 = { name: 'xx', age: 12 } function createCat(name, age){ let obj = new Object() obj.name = name obj.age = age return obj } let cat3 = createCat('haha', 14) console.log(cat3) function createCat1(name, age){ this.name = name this.age = age this.bark = () => { console.log(this.name + '++++++') } } let cat4 = new createCat1('who',24) console.log(cat4)