What are mandatory properties in TypeScript?

What are mandatory properties in TypeScript?

Mandatory properties in TypeScript are properties that must be defined in an object type. They are specified without a question mark in the type definition.

Can you give me an example of how to define them?

Sure! Here's an example:

interface User {
  name: string;
  age: number;
}

In this case, both name and age are mandatory properties.

What happens if I don't provide a mandatory property?

If you don't provide a mandatory property, TypeScript will throw a compilation error, indicating that the property is missing.

Can mandatory properties be optional in some cases?

No, mandatory properties cannot be optional. However, you can define optional properties using a question mark, like this: age?: number;.