name: "Karin",

  hobby: "Programmieren"

}

​

console.log(person.name);

// -> "Karin"

console.log(person.hobby);

// -> "Programmieren"

​

console.log(person.lieblingsfarbe);

// -> undefined

​

person.lieblingsfarbe = "Pink";

console.log(person.lieblingsfarbe);

// -> Pink