Record Collection - How to update properties of JavaScript Object without editing the actual object?

JavaScript
1 
// Setup
const recordCollection = {
  2548: {
    albumTitle: 'Slippery When Wet',
    artist: 'Bon Jovi',
    tracks: ['Let It Rock', 'You Give Love a Bad Name']
  },
  2468: {
    albumTitle: '1999',
    artist: 'Prince',
    tracks: ['1999', 'Little Red Corvette']
  },
  1245: {
    artist: 'Robert Palmer',
    tracks: []
  },
  5439: {
    albumTitle: 'ABBA Gold'
  }
};

// Only change code below this line
function updateRecords(records, id, prop, value) {
  return records;
}

updateRecords(recordCollection, 5439, 'artist', 'ABBA');

for example in the last line of code ‘artist’ should be equal to ‘ABBA’ but the ‘artist’ property for id 5439 does not exist

how to add/delete or update properties of a JavaScript object?

2

Just example:

const recordCollection = {
  2548: {
    albumTitle: 'Slippery When Wet',
    artist: 'Bon Jovi',
    tracks: ['Let It Rock', 'You Give Love a Bad Name']
  },
  2468: {
    albumTitle: '1999',
    artist: 'Prince',
    tracks: ['1999', 'Little Red Corvette']
  },
  1245: {
    artist: 'Robert Palmer',
    tracks: []
  },
  5439: {
    albumTitle: 'ABBA Gold'
  }
};


recordCollection[9999] = {'whatever' : 'random stuff'}

console.log(recordCollection)
/* Output:
{
  '1245': { artist: 'Robert Palmer', tracks: [] },
  '2468': {
    albumTitle: '1999',
    artist: 'Prince',
    tracks: [ '1999', 'Little Red Corvette' ]
  },
  '2548': {
    albumTitle: 'Slippery When Wet',
    artist: 'Bon Jovi',
    tracks: [ 'Let It Rock', 'You Give Love a Bad Name' ]
  },
  '5439': { albumTitle: 'ABBA Gold' },
  '9999': { whatever: 'random stuff' }
}
*/
3

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