对象转储JavaScript

const obj = {
  name: "John",
  age: 30,
  city: "New York"
};

const objKeys = Object.keys(obj);
const objValues = Object.values(obj);
const objEntries = Object.entries(obj);

console.log(objKeys); // ["name", "age", "city"]
console.log(objValues); // ["John", 30, "New York"]
console.log(objEntries); // [["name", "John"], ["age", 30], ["city", "New York"]]

// 将对象转储为JSON格式
const objDump = JSON.stringify(obj);
console.log(objDump); // {"name":"John","age":30,"city":"New York"}