JavaScript(JS) JS count the number of keys properties in an object

To count the number of keys or properties in a JavaScript object, you can use the Object.keys() method to get an array of all the keys of the object, and then use the length property of that array to get the number of keys. Here's an example:

const myObj = {a: 1, b: 2, c: 3};

const numKeys = Object.keys(myObj).length;

console.log(numKeys); // output: 3

In this example, we first create an object myObj with three key-value pairs. Then we use the Object.keys() method to get an array of all the keys in the object, which is ['a', 'b', 'c']. Finally, we use the length property of the array to get the number of keys, which is 3.