Today's date -30 days in JavaScript

Question

I need to get today's date -30 days but in the format of: "2016-06-08"

I have tried setDate(date.getDate() - 30); for -30 days.

I have tried date.toISOString().split('T')[0] for the format.

Both work, but somehow cannot be used together.

Answer 1

// Format date object into a YYYY-MM-DD string
const formatDate = (date) => (date.toISOString().split('T')[0]);

const currentDate = new Date();

// Values in milliseconds
const currentDateInMs = currentDate.valueOf();
const ThirtyDaysInMs = 1000 * 60 * 60 * 24 * 30;

const calculatedDate = new Date(currentDateInMs - ThirtyDaysInMs);

console.log(formatDate(currentDate));
console.log(formatDate(calculatedDate));