How to get the latest and oldest record in mongoose.js (or just the timespan between them)

Question

Basic problem

I have a bunch of records and I need to get latest (most recent) and the oldest (least recent).

When googling I found this topic where I saw

Answer 1

We have method called sort using that we can able to get first element(old document) which means 1 for sort field or last element(new document) which means -1 for sort field of collection.