How do I use the unknown type in TypeScript?

What is the unknown type in TypeScript?

The unknown type in TypeScript is a type-safe counterpart to any. It represents any value but requires type checking before use.

How is it different from the any type?

Unlike any, which allows any operation without checks, unknown requires you to perform type checks before using the value.

Can you give me an example of using unknown?

Sure! Here's an example:

function processValue(value: unknown) {
    if (typeof value === 'string') {
        console.log(value.toUpperCase());
    }
}

In this function, we check if the value is a string before using it.

When should I use unknown instead of any?

Use unknown when you want to ensure type safety and require explicit type checks, making your code more robust.