How to count the number of elements in this json object?

Question

I want to get the number of elements for this JSON object in javascript.

data = 
{
    name_data: {
        35: {
            name: "AA",
        },
        47: {
            name: "BB",
        },
        48: {
            name: "CC",
        },
        49: {
            name: "DD",
        }
    }
}

The correct answer should be 4. My code is data.name_data.length but it returns an undefined object. How can the correct number of elements in this JSON object be obtained in javascript?

`JSON` is a text format. What you have there is a Javascript object and not JSON. — jfriend00, Jul 27 '14 at 01:37

Khalid · Accepted Answer · 2021-05-14T17:59:20.730

31

You can use Object.keys:

 Object.keys(data).length; // returns 1
 Object.keys(data.name_data).length; // returns 4

edited May 14 '21 at 17:59

answered Jul 27 '14 at 01:39

Khalid

4,730
5
27
50

How about nested elements? Is there a way to include that in the overall count as well? – Bat_Programmer May 10 '22 at 04:32

How to count the number of elements in this json object?

1 Answers1