destructuring object in javascript

1const book = {
2    title: 'Ego is the Enemy',
3    author: 'Ryan Holiday',
4    publisher: {
5        name: 'Penguin',
6        type: 'private'
7    }
8};
9
10const {title: bookName =  'Ego', author, name: {publisher: { name }} = book, type: {publisher: { type }} = book } = book;

1({ a, b } = { a: 10, b: 20 });
2console.log(a); // 10
3console.log(b); // 20
4
5
6// Stage 4(finished) proposal
7({a, b, ...rest} = {a: 10, b: 20, c: 30, d: 40});
8console.log(a); // 10
9console.log(b); // 20
10console.log(rest); // {c: 30, d: 40}
11

1Object Destructuring =>
2//
3   The destructuring assignment syntax is a JavaScript expression that makes it
4possible to unpack values from arrays,
5or properties from objects, into distinct variables.
6//
7example:
8const user = {
9    id: 42,
10    is_verified: true
11};
12
13const {id, is_verified} = user;
14
15console.log(id); // 42
16console.log(is_verified); // true 
17

1const hero = {
2  name: 'Batman',
3  realName: 'Bruce Wayne',
4  address: {
5    city: 'Gotham'
6  }
7};
8
9// Object destructuring:
10const { realName, address: { city } } = hero;
11city; // => 'Gotham'

1const { identifier } = expression;

1let {name, country, job} = {name: "Sarah", country: "Nigeria", job: "Developer"};
2
3console.log(name);//"Sarah"
4console.log(country);//"Nigeria"
5console.log(job);//Developer"
6