What's the output?

const createMember = ({ email, address = {}}) => {
	const validEmail = /.+\@.+\..+/.test(email)
	if (!validEmail) throw new Error("Valid email pls")

	return {
		email,
		address: address ? address : null
	}
}

const member = createMember({ email: "my@email.com" })
console.log(member)

You missed this one before

The default value of address is an empty object {}. When we set the variable member equal to the object returned by the createMember function, we didn't pass a value for the address, which means that the value of the address is the default empty object {}. An empty object is a truthy value, which means that the condition of the address ? address : null conditional returns true. The value of the address is the empty object {}.

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