What is the difference between TypeScript enums and const objects?

What is the difference between TypeScript enums and const objects?

TypeScript enums are a way to define a set of named constants, while const objects are just immutable objects. Enums can be numeric or string-based, providing a more structured way to handle sets of related values.

Can you give me an example of each?

Sure! Here's an enum example:

enum Color {
  Red,
  Green,
  Blue
}

And a const object example:

const Colors = {
  RED: 'red',
  GREEN: 'green',
  BLUE: 'blue'
} as const;

When should I use enums instead of const objects?

Use enums when you need a set of related constants that can be easily referenced and iterated over. Use const objects when you want to define a fixed set of properties with specific values.

Are there any performance differences between the two?

Generally, enums can have a slight overhead due to their additional features, but in most cases, the performance difference is negligible. Choose based on readability and maintainability.