Get all 90 days before today with javascript

I want to have all 90 days before today as an array. I couldn't any solution in StackOverflow or Google.

const now = new Date(); const daysBefore = now.setDate(priorDate.getDate() - 90); 

My expected result is an array of 90 days before today:

const days = [ '2021-06-03T05:45:36.685Z', '2021-06-02T05:45:36.685Z', '2021-06-01T05:45:36.685Z', '2021-05-30T05:45:36.685Z', ... ] 

1 Answer

Create an array of dates by creating a new array of length 90 and mapping each entry to a new date that is now minus the index number of days

const now = new Date() const length = 90 const days = Array.from({ length }, (_, days) => { let day = new Date(now) // clone "now" day.setDate(now.getDate() - days) // change the date return day }) console.log(days)

This creates an array of Date instances starting with now and working back for 90 days (descending order).

See also Array.from()