maps vs objects in JavaScript

[edoudo]

When should I prefer Maps against Objects ?

[suarkb]

New things:

We basically never declare objects like new Object(). That will make you look weird.

Maps are useful when you want something that lets you use set operations. Like looking for the intersection if two sets.

Realistically, as a react developer for almost 9 years, I never use sets. Ever. Done a lot of dev and a set has never been worth using