What are type assertions in TypeScript?

What are type assertions in TypeScript?

Type assertions are a way to tell the TypeScript compiler to treat a variable as a specific type. It doesn't change the runtime behavior.

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

Sure! You can use the as keyword. For example: let someValue: any = 'this is a string'; let strLength: number = (someValue as string).length;

Are type assertions the same as type casting?

Not exactly. Type assertions do not perform any special checking or restructuring of data. They are purely a compile-time feature.

When should I use type assertions?

Use type assertions when you know more about the type of a variable than TypeScript does, especially when working with dynamic content.