I've been searching for a way to create an array of the 90 days before today, but I haven't found a solution on StackOverflow or Google.
const now = new Date();
const daysBefore = now.setDate(priorDate.getDate() - 90);
The result I'm looking for is an array that includes the dates of the 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',
...
]
To generate an array of dates, start by creating a new array that is 90 days long. Map each entry in the array to a date that is calculated as "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) // update the date
return day
})
console.log(days)This approach results in an array of Date objects starting from the current date and going back for 90 days (in descending order).
For more information, refer to Array.from()
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