Output of an entire object in JavaScript

The contents of an entire object cannot be viewed normally with the function alert:

let obj = {1: 'a', 2: 'b', 3: 'c'}; alert(obj); // shows [Object object]

To see the contents of the entire object, you need to print it to the console:

let obj = {1: 'a', 2: 'b', 3: 'c'}; console.log(obj); // shows the object itself

Create an object with keys from 1 to 12, containing month names as values. Print this object to the console.