What are the key types in JavaScript collections?

What are the key types in JavaScript collections?

In JavaScript, collections like Maps and Sets can use various key types. Maps allow any value as a key, while Sets use unique values.

Can you explain how Maps work with different key types?

Sure! Maps can use objects, functions, or primitive types as keys. Each key-value pair is stored in the order of insertion.

What about Sets? How do they handle keys?

Sets store unique values, meaning each value can only appear once. They don't allow duplicate entries.

Are there any performance considerations when using these collections?

Yes, Maps generally have better performance for frequent additions and removals compared to plain objects, especially with large datasets.