Introduced in ES2017.

This method returns an array containing all the object own properties, as an array of [key, value] pairs.

Usage:

const person = { name: 'Fred', age: 87 }
Object.entries(person) // [['name', 'Fred'], ['age', 87]]

Object.entries() also works with arrays:

const people = ['Fred', 'Tony']
Object.entries(people) // [['0', 'Fred'], ['1', 'Tony']]

You can use it to count the number of properties an object contains, combined with the length property of the array.


Download my free JavaScript Beginner's Handbook!


Check out my in-depth, practical Web Development Courses!

(all 50% off with the coupon code POSITIVEVIBRATIONS)

⤴️⤴️⤴️

And signup to my upcoming JavaScript Bootcamp!

⤴️⤴️⤴️