What are the differences between union types and enum types in TypeScript?

What are the differences between union types and enum types in TypeScript?

Union types allow a variable to hold multiple types, while enum types define a set of named constants.

Can you give me an example of each?

Sure! A union type example: let value: string | number; An enum example: enum Color { Red, Green, Blue };.

When should I use union types over enum types?

Use union types when you need flexibility with multiple types, and enums when you want a fixed set of related constants.

Are there any performance differences between them?

Generally, enums can be more performant for fixed sets, while union types may require more checks at runtime.