What are some real-world examples of conditional types in TypeScript?

What are some real-world examples of conditional types in TypeScript?

Conditional types in TypeScript allow you to create types based on conditions. For example, you can use them to create a type that checks if a given type is a string or not.

Can you give me a specific example?

Sure! Here's a simple example: type IsString<T> = T extends string ? 'Yes' : 'No';. This type checks if T is a string.

How would this be useful in a real application?

It can be useful for creating utility types that enforce type safety in functions, ensuring that parameters are of the expected type.

Are there more complex examples?

Absolutely! You can create types that infer properties from other types, like mapping over object types to create new types based on their properties.