When should I use unions in TypeScript?

When should I use unions in TypeScript?

You should use unions in TypeScript when you want a variable to hold multiple types. For example, if a function can return either a string or a number, you can define its return type as string | number.

Can you give me an example of a union type?

Sure! Here's a simple example: type ID = string | number; This means that the variable ID can be either a string or a number.

What are the benefits of using union types?

Union types enhance type safety by allowing you to specify exactly what types a variable can be, reducing runtime errors and improving code clarity.

Are there any downsides to using unions?

One downside is that they can make your code more complex, especially if overused. It can also lead to more exhaustive checks in your code.