How to get the size of a JavaScript object ?

0 0 1 minute read

In this article, we will see the methods to find the size of a Javascript object. We can get the size of the javascript object with the help of Object.keys() method.

Syntax:

Object.keys(object_name)

object_name

Return Value: an array of all the object’s own enumerable property keys.

Approach:

Create an object variable and assign values to it
Create a variable that shows the size
Call the Object.keys(object-name).length and assign it to the variable (in step 2).

Example: To get the size of a javascript object by Object.keys() method.

javascript

let object1= { "rajnish":"singh",
               "sanjeev":"sharma",
               "suraj":"agrahari",
               "yash":"khandelwal"
             };
let count= Object.keys(object1).length;
console.log(count);

Output:

Approach 2: Another way to get the size of the javascript object is:

Create an object variable and assign values to it
Create a variable that shows the size
Pass the object name to Object.objsize which further enters the function which calculates and returns the size and assigns it to the variable.

Example:

javascript

Object.objsize = function(obj) {
    let size = 0, key;
 
    for (key in obj) {
        if (obj.hasOwnProperty(key))
        size++;
    }
    return size;
};
 
let object1 = { "rajnish":"singh",
                "sanjeev":"sharma",
                "suraj":"agrahari",
                "yash":"khandelwal"
              };
 
let count = Object.objsize(object1);
console.log(count);