How do I use the readonly type in TypeScript?

What is the readonly type in TypeScript?

The readonly type in TypeScript is used to create properties that cannot be modified after their initial assignment.

Can you give me an example of how to use readonly?

Sure! You can define a readonly array like this: readonly number[] which prevents any modifications to the array.

What happens if I try to change a readonly property?

If you try to change a readonly property, TypeScript will throw a compilation error, ensuring immutability.

Are there any best practices for using readonly?

Yes, use readonly for properties that should not change, especially in function parameters and class properties to enhance code safety.