Updating javascript object property?

Question

I have a structure like the following:

skillet.person = {
  name: {
    first: \'\',
    last: \'\'
  }, 
  age: {
    current: \'\' 
  },
  birthday: {
    day:         


        

Answer 1

As @ramon-diogo wrote with ES7+

I like to update nested values like:

let user = {
    name: {
        first: 'john',
        last: 'smith'
    },
    age: 18,
    city: 'new york'
}

const age = 20;

user = {...user, age}

console.log(user.age)
// output: 20


const newData ={
    age: 22,
    city: 'san francisco'
};

user = {...user,...newData}

console.log(user.name.first)
// output: john
console.log(user.age)
// output: 22
console.log(user.city)
// output: 'san francisco'