TypeError: Cannot set properties of undefined (setting 'prop')

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.

I tried to use dot notation instead of bracket notation to access and update the nested object here but I keep on receiving the Type Error about prop being undefined

  **Your code so far**


// 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) {
if (value === '') {
  delete records.id.prop;
} else if (prop === 'tracks') {
  records.id.prop = records.id.prop.push(value);
} else {
  records.id.prop = value;
}
return records;
}

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

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Challenge: Record Collection

Link to the challenge:

2

You cannot use dot notation with variables that hold property names… That just not how dot notation works.

3

Appreciate the feedback; I watched a few more videos on notation to better grasp the idea. I’ve always thought dot and bracket notation can be used interchangeably, but now I know better haha

4

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