What are some examples of type assertions in TypeScript?

Can you explain what type assertions are in TypeScript?

Type assertions are a way to tell the TypeScript compiler to treat a value as a specific type. They are useful when you know more about the type of a variable than TypeScript does.

Can you give me an example of how to use type assertions?

Sure! For instance, if you have a variable someValue that you know is a string, you can assert its type like this: let strLength: number = (someValue as string).length;.

Are there different ways to assert types?

Yes, you can use the as syntax or the angle-bracket syntax. For example: let strLength: number = (<string>someValue).length;.

When should I use type assertions?

Use type assertions when you are confident about the type of a variable but TypeScript cannot infer it correctly. However, use them sparingly to avoid runtime errors.