JavaScript Array: Order Nested Object by Key

Question

I have the following nested object. I would like to iterate through every item (latest.sentTime) and then sort the object itself by "sentTime". So that the most recent message is on top. How can I achieve this?

In the following example, "0" and "1" need to be swapped basically, since "1" has a more recent "sentTime".

Answer 1

• Using Array#map, iterate over the array to get latest.sentTime
• Using Array#sort and Date, sort the items

const arr = [ 
  { latest: { sentTime: '2022-02-05T19:15:32.000Z' } },
  { latest: { sentTime: '2022-02-06T22:12:00.000Z' } } 
];

const sentTimes = arr
  .map(({ latest }) => latest.sentTime)
  .sort((a, b) => new Date(b) - new Date(a));

console.log(sentTimes);