What are TypeScript type guards and how do they work?

What are TypeScript type guards and how do they work?

TypeScript type guards are techniques used to narrow down the type of a variable within a conditional block. They help ensure type safety.

Can you give me an example of a type guard?

Sure! A common type guard is the typeof operator. For instance, you can check if a variable is a string like this: if (typeof value === 'string') { ... }.

Are there other ways to create type guards?

Yes, you can also create custom type guards using functions. For example, you can define a function that checks if an object is of a specific type.

What about using interfaces with type guards?

You can use interfaces to define types and then use type guards to check if an object conforms to that interface, enhancing type safety.