Updating javascript object property?

Question

I have a structure like the following:

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


        

Answer 1

I think that is simpler

     let skillet = {
        person: {
            name    : {
                first: '',
                last : ''
            },
            age     : {
                current: ''
            },
            birthday: {
                day  : '',
                month: '',
                year : ''
            }
        }
    };

    let update = {
        person: {
            name: {
                first: 'blah',
                last : 'ha'
            }
        }
    };

    let result = Object.assign(skillet.person, update.person);

    console.log(result);