객체 (4줄 짜리)

//객체

const superman ={
name : 'clark',
age : 30 ,
}

superman.hairColor = 'greenyellow';
superman['hobby'] ='baseball';
console.log(superman)



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함수 속 객체

function makeObject(name, age){
return {
name,
age,
hobby:"baseball"
};
}

const Mini = makeObject("Mikimousei", 20 );
console.log(Mini);

//추가로 불린 값 물어볼 때
console.log("name" in Mini);