Can default parameters in functions be objects?

Can default parameters in functions be objects?

Yes, default parameters in functions can be objects. This allows you to set default values for multiple properties.

Can you give me an example of a function with an object as a default parameter?

Sure! Here's an example:

function greet({ name = 'Guest', age = 18 } = {}) {
    return `Hello, ${name}. You are ${age} years old.`;
}

In this function, if no argument is provided, it defaults to an object with name as 'Guest' and age as 18.

What happens if I pass an empty object?

If you pass an empty object, the function will use the default values for name and age since they are defined in the function.

Can I override just one of the default values?

Yes, you can override just one of the default values by passing an object with the specific property you want to change. For example:

greet({ name: 'Alice' });

This will return 'Hello, Alice. You are 18 years old.'