javascript count properties code example

Example 1: javascript get length of object

var person={
    "first_name":"Harry",
    "last_name":"Potter",
    "age":14
};
var personSize = Object.keys(person).length; //gets number of properties (3)

Example 2: js obj getting count of properties

let count = 0;
for (let k in myobj) if (myobj.hasOwnProperty(k)) count++;