Question 253157 in Javascript Question posted in
A very good W3school tutorial can be found here.

Get more dates from a base date in javascript

I have a date in this format – 20230926 (yyyymmdd).

whatever date I get at runtime I want to have dates till next 120 days in an array. For example If I get date 20230926. Then my final array should contain date from today till next 120 days. Means final array will have 120 records.

  finalArray = [26-09-2023,27-09-2023,28-09-2023.
   
    .etc till next 120 days]

. How can I do that?

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2

Answers


  1. 0

    You can use a for-loop to iterate through a date object. For each step, increment the date by 1.

    const now = new Date();
const daysInFuture = 120;
const dates = getDatesInRange(now, daysInFuture);
const expectedEndDate = getFutureDate(now, daysInFuture - 1); // Exclusive

console.log(expectedEndDate.toString() === dates[dates.length - 1].toString());
console.log(dates.length === 120);
console.log(dates); // Show all the dates

function getDatesInRange(startDate, count) {
  const results = [], currDate = new Date(startDate.getTime());
  for (let i = 0; i < count; i++) {
    results.push(new Date(currDate.getTime()));
    currDate.setDate(currDate.getDate() + 1);
  }
  return results;
}

function getFutureDate(relativeDate, days) {
  const result = new Date(relativeDate.getTime());
  result.setDate(result.getDate() + days);
  return result;
}
    .as-console-wrapper { top: 0; max-height: 100% !important; }
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  2. 0

    You can use getDate() to get the current date and increment days and set using setDate(). You have to do it upto 120 times to reach your limit.

    To deal with Local time,

    const currentDate = new Date();
const nextDates = [];
const dateLimit = 120;

for(let i = 1; i <= dateLimit; i++){
  const tempDate = new Date();
  tempDate.setDate(tempDate.getDate() + i);
  nextDates.push(tempDate);
}

console.log(nextDates)

    For UTC operations, Use

    tempDate.setUTCDate(tempDate.getUTCDate() + i);
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