What are type-safe enums in TypeScript?

What are type-safe enums in TypeScript?

Type-safe enums in TypeScript are a way to define a set of named constants that are strongly typed, ensuring type safety.

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

Sure! Here's a simple example:

enum Direction {
    Up,
    Down,
    Left,
    Right
}

This defines an enum called Direction with four possible values.

How do they differ from regular enums?

Type-safe enums provide better type checking and can be used with string values, while regular enums are more flexible but less safe.

Are there any performance implications of using type-safe enums?

Generally, type-safe enums have minimal performance overhead, but they can help catch errors at compile time, which is beneficial.