What are some practical use cases for TypeScript enums?

What are some practical use cases for TypeScript enums?

TypeScript enums are useful for defining a set of named constants. They can be used in scenarios like managing state, defining action types in Redux, or representing fixed options in a dropdown.

Can you give me an example of using enums in a switch statement?

Sure! Here's an example:

enum Direction {
    Up,
    Down,
    Left,
    Right
}

function move(direction: Direction) {
    switch (direction) {
        case Direction.Up:
            console.log('Moving up!');
            break;
        case Direction.Down:
            console.log('Moving down!');
            break;
        // Add other cases as needed
    }
}

What are the benefits of using enums over plain strings?

Enums provide better type safety, auto-completion in IDEs, and prevent errors from using incorrect string values. They also make your code more readable.

Are there any performance considerations when using enums?

Enums in TypeScript are compiled to objects in JavaScript, which can have a slight overhead. However, the benefits in code clarity and maintainability usually outweigh the performance costs.