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How to format a date as yyyymmdd using javascript -

How to format a date as yyyymmdd using javascript

You are working with date data in JavaScript and want to format a date as yyyymmdd using javascript. This article is what you are looking for. 

Format a date as yyyymmdd using javascript

Use Date.toLocaleString() with locales argument

Syntax:

Date.toLocaleString(locales)

  • locales: a value representing a region/country.

The value returned will correspond to the format of each region/country.

When using the ‘locale’ parameter, you will receive the date in the conventional format of the specific region/country in the output. 

In case we are interested, select the region/country that uses the YYYY-MM-DD format. Combined with the additional use of replaceAll() or split() + join(). You will get the desired result.

The purpose of using replaceAll() or split() + join() is to remove concatenation characters like “-“,”/”,.. See the following example for a better understanding:

const today =  new Date().toLocaleDateString("sv-EN")  // 2022-09-17
const result1 = today.split('-').join('')
const result2 = today.replaceAll('-','')

console.log(result1)
console.log(result2)

Output:

20220917
20220917

Sometimes you will also need to use reverse() if working with the DD-MM-YYYY format.

const today =  new Date().toLocaleDateString("en-GB")  // 17/09/2022
const result1 = today.split('/').reverse().join('')  // 20220917

Use Date.toLocaleString() with both arguments

Syntax:

Date.toLocaleString(locales, options)

  • locales: a value representing a region/country. The value returned will correspond to the format of each region/country.
  • options: an object used to modify the output

Unlike the first method, we use the ‘options‘ and ‘locales’ parameters in this method.

//This way is the same as new Date("2022-07-14")
let date = new Date("Fri , 14 July 2022");

const y = date.toLocaleString("sv-EN", { year: "numeric"});
const m = date.toLocaleString("sv-EN", { month: "2-digit" });
const d = date.toLocaleString("sv-EN", { day: "2-digit" });
result = y + m + d
console.log(result)

Output:

20220714

We use objects like {year: “numeric”} to get the year’s value, same with month and day. However, the value corresponding to the month/day key is “2-digit”. The reason is to change the values ​​1,2,3…,9 to 01,02,03,…,09 in the required format.

Use the getFullYear(), getMonth(), getDate() method

  • Date.getFullYear(): returns the year’s value. The value range is from 1000 to 9999.
  • Date.getMonth():  returns the month’s value. The value range is from 0 to 11. Notably, the value 0 corresponds to January; the value 1 corresponds to February,…
  • Date.getDate(): returns the day’s value. The value range is from 1 to 31.
//This way is the same as new Date("2022-07-14")
let date = new Date("Fri , 14 July 2022");

const y = String(date.getFullYear())
const m = String(date.getMonth() + 1).padStart(2, '0')
const d = String(date.getDate()).padStart(2, '0')
result =  y + m + d
console.log(result)

Output:

20220714

Just like the example in the second method, we use padStart(2, ‘0’) to get the final result in the correct “YYYYMMDD” format.

In methods two and three, you can use statements directly or wrap them in a function. Wrap them in a function to make your code more readable, avoiding calling the same statements repeatedly.

Summary

The methods mentioned in this article will help you Format A Date As YYYYMMDD Using JavaScript. Use the method that you find works best.

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