What are the differences between enum and const assertions in TypeScript?

What are the differences between enum and const assertions in TypeScript?

Enums in TypeScript are a way to define a set of named constants, while const assertions allow you to create a constant value that retains its literal type.

Can you give me an example of how to use both?

Sure! An enum can be defined like this: enum Color { Red, Green, Blue }. A const assertion can be used like this: const colors = ['Red', 'Green', 'Blue'] as const;.

When should I use enums instead of const assertions?

Use enums when you need a set of related constants that can be referenced by name, and const assertions when you want to create a tuple or array with fixed values.

Are there any performance differences between the two?

Generally, enums are compiled to objects, which can have a slight overhead, while const assertions are optimized to retain their literal types, making them lightweight.