What are some practical use cases for conditional types in TypeScript?

What are some practical use cases for conditional types in TypeScript?

Conditional types in TypeScript allow you to create types based on conditions. For example, you can use them to create types that depend on whether a certain type is assignable to another.

Can you give me an example of a conditional type?

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

How can I use conditional types with interfaces?

You can use conditional types to create interfaces that adapt based on other types. For instance, you could define an interface that changes its properties based on whether a type is a string or not.

What are the benefits of using conditional types?

They enhance type safety and allow for more flexible and reusable code, making it easier to manage complex type relationships.