function Contacts(vn) {
    let contacts = [
        {name: 'Fred', email: 'fred@example.com'},
        {name: 'Bob', email: 'bob@example.com'},
    ]

    function addContact(contact) {
        contacts.push(contact)
    }

    function delContact(email) {
        // PROBLEM HERE
        contacts = contacts.filter((el) => el.email !== email);
    }

    return {
        view: function() {
            return m("main", [
                m(ContactForm, {addContact: addContact}),
                m(ContactList, {contacts: contacts, delContact: delContact}),
            ])
        }
    }
}