How do I iterate over a Map vs an Object in JavaScript?

What's the difference between iterating over a Map and an Object in JavaScript?

In JavaScript, a Map is an iterable collection of key-value pairs, while an Object is a collection of properties. You can use different methods to iterate over them.

How do I iterate over a Map?

You can use the forEach method or a for...of loop with map.entries() to iterate over a Map.

And how about an Object?

For an Object, you can use for...in to iterate over its keys or Object.keys() to get an array of keys and then iterate over that.

Are there performance differences between the two?

Yes, Maps generally have better performance for frequent additions and removals of key-value pairs compared to Objects.