Objects: Object destructuring

Given an object, you can extract just some values and put them into named variables:

const person = {
  firstName: 'Tom',
  lastName: 'Cruise',
  actor: true,
  age: 54, //made up

You can extract just some of the object properties and put them into named variables:

const { firstName, age } = person

Now we have 2 new variables, firstName and age, that contain the desired values:

console.log(firstName) // 'Tom'
console.log(age) // 54

The value assigned to the variables does not depend on the order we list them, but it’s based on the property names.

You can also automatically assign a property to a variable with another name:

const { firstName: name, age } = person

Now instead of a variable named firstName, like we had in the previous example, we have a name variable that holds the person.firstName value:

console.log(name) // 'Tom'

Lessons this unit:

0: Introduction
1: How to create an object
2: Object properties
3: Objects are passed by reference
4: Methods
5: Passing objects as function arguments or returning objects from a function
6: Accessing a property of the object inside a method using `this`
7: ▶︎ Object destructuring
8: Cloning objects
9: Sort an array of objects by a property value
10: Merging two objects into one
11: apply, call, bind