解構物件

解構是將物件的屬性提取到變數中的便捷方式。

基本語法：

let person = {
  name: 'Bob',
  age: 25
};

let { name, age } = person;

// Is equivalent to
let name = person.name; // 'Bob'
let age = person.age;   // 25

解構和重新命名：

let person = {
  name: 'Bob',
  age: 25
};

let { name: firstName } = person;

// Is equivalent to
let firstName = person.name; // 'Bob'

使用預設值進行解構：

let person = {
  name: 'Bob',
  age: 25
};

let { phone = '123-456-789' } = person;

// Is equivalent to
let phone = person.hasOwnProperty('phone') ? person.phone : '123-456-789'; // '123-456-789'

使用預設值進行解構和重新命名

let person = {
  name: 'Bob',
  age: 25
};

let { phone: p = '123-456-789' } = person;

// Is equivalent to
let p = person.hasOwnProperty('phone') ? person.phone : '123-456-789'; // '123-456-789'