How to convert a Map into an Object in JavaScript?

In JavaScript, a Map is a native class (since ES6) that makes it easy to create data dictionaries!

If you're wondering what the differences are between a JSON object (key-value) and a Map, you can read this article.

Let's take a very simplified example dictionary, like this:

const myMap = new Map();

myMap.set("a", "alternative");
myMap.set("b", "binoculaire");
myMap.set("c", "cyclomoteur");

To convert it to an Object type, simply use the fromEntries method of the Object class, like this:

const myObject = Object.fromEntries(myMap);

console.log(myObject);
// Output: { a: "alternative", b: "binoculaire", c: "cyclomoteur" }

And there you go, your dictionary is now stored in a classic JSON object!

Careful: The conversion only happens on a single level of depth, so if your Map contains other Maps, then your final Object will also contain those Maps.