How to get number of keys of object in javascript?

Hi Friends 👋,

Welcome To Infinitbility! ❤️

Today, we are going to learn How to get a number of keys of objects in javascript, here we will use the keys() method and array length to get a number of keys.

Basically, The keys() method creates an array of object keys, and when we got an array we will use simple array length syntax to get a number of keys.

Well, let’s start today’s tutorial How to get the number of keys of the object in javascript?

Here, we will do

1. create a sample object variable
2. use Object.keys() method to get an array
3. use .length to get the number of keys

// create sampel oject variable
let sampleObject = {
  id: 1,
  name: "infinitbility",
  domain: "infinitbility.com",
  email: "[email protected]"
};

// convert keys to array
let sampleObjectKeys = Object.keys(sampleObject);
console.log("sampleObjectKeys", sampleObjectKeys)

// print number of keys
console.log("number of keys", sampleObjectKeys.length);

we can also write in one line like the below example.

console.log(Object.keys(sampleObject).length);

lets run it, it should show 4 number of keys.

Output

All the best 👍.