how to find how many keys are in a dictionary javascript code example

Example 1: length of dict js

// check length of dictionary

let dict = {a:1 , b:2 , c:3}

console.log(Object.keys(dict).length) // expected result : 3

Example 2: 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)