Converting 10 digit timestamp to date

Converting 10 digit timestamp to date

Converting/reading 10 digit timestamp might seem confusing. I found this value in a field of a JSON response from an API where I was expecting a date. At the first, I couldn't figure out how to convert it to date for UI. After some research I found that the 10-digit timestamps represent the number of seconds.
Anyway, history lesson finished. How do you convert that to something useful in Javascript?